Toyota Tundra Service Manual: Engine Stall History (P1603,P1605)

Toyota Tundra Service Manual / Engine, Hybrid System / 1ur-fe Engine Control / Sfi System / Engine Stall History (P1603,P1605)

DESCRIPTION

P1603

After starting the engine, this DTC is stored when the engine stops without the ignition switch being operated.

Using the Techstream, the conditions present when the DTC was stored can be confirmed by referring to the freeze frame data. Freeze frame data records engine conditions when a malfunction occurs. This information can be useful when troubleshooting.

It is necessary to check if the vehicle has ran out of fuel before performing troubleshooting, as this DTC is also stored when the engine stalls due to running out of fuel.

DTC No.	DTC Detection Condition	Trouble Area
P1603	After monitoring for startability problems (P1604) finishes and 2 seconds or more elapse after starting the engine, with the engine running, the engine stops (the engine speed drops to 200 rpm or less) without the ignition switch being operated for 0.5 seconds or more (1 trip detection logic).	Air leak in intake system Purge VSV Brake booster Mass air flow meter Engine coolant temperature sensor Water inlet with thermostat sub-assembly Power supply circuit (purge VSV, air fuel ratio sensor, fuel injector assembly, ignition coil assembly) Fuel pump Fuel pump control circuit Fuel line PCV valve and hose Camshaft timing oil control valve Knock sensor Ignition system Air conditioning system Power steering system Electrical load signal system Charging system A/T system Park/neutral position switch assembly ECM Wire harness or connector EGR valve assembly Engine immobiliser system

P1605

This DTC is stored if the engine speed drops below the set speed without the ignition switch being operated.

It is necessary to check if the vehicle ran out of fuel before performing troubleshooting, as this DTC is also stored when idling is unstable due to running out of fuel.

DTC No.	DTC Detection Condition	Trouble Area
P1605	After 5 seconds or more elapse after starting the engine, with the engine running, the engine speed drops to 400 rpm or less without the ignition switch being operated for 0.5 seconds or more (1 trip detection logic).	Air leak in intake system Purge VSV Brake booster Mass air flow meter Engine coolant temperature sensor Water inlet with thermostat sub-assembly Power supply circuit (purge VSV, air fuel ratio sensor, fuel injector assembly, ignition coil assembly) Fuel pump Fuel pump control circuit Fuel line PCV valve and hose Camshaft timing oil control valve Knock sensor Ignition system Air conditioning system Power steering system Electrical load signal system Charging system A/T system Park/neutral position switch assembly ECM Wire harness or connector EGR valve assembly Engine immobiliser system

CAUTION / NOTICE / HINT

HINT:

In contrast to normal malfunction diagnosis for components, circuits and systems, DTCs P1603 and P1605 are used to determine the malfunctioning area from the problem symptoms and freeze frame data when the user mentions problems such as engine stall.
As these DTCs can be stored as a result of certain user actions, even if these DTCs are output, if the customer makes no mention of problems, clear these DTCs without performing any troubleshooting and return the vehicle to the customer.
If any other DTCs are output, perform troubleshooting for those DTCs first.

Use any information from the customer problem analysis about the condition of the vehicle at the time when the problem occurred (how the engine stopped, conditions when the engine was restarted, etc.) as a reference.

Symptom	Suspected Area
Engine vibration occurs and engine stops	Air-fuel ratio abnormal
Engine stops with no engine vibration	Ignition system, injection stoppage, high load from external parts
Engine can be started with accelerator pedal depressed	Insufficient air volume
Rough idling after engine started	Air-fuel ratio abnormal, abnormal combustion

Read freeze frame data using the Techstream. Freeze frame data records engine conditions when a malfunction occurs. This information can be useful when troubleshooting.
When confirming the freeze frame data, be sure to check all 5 sets of freeze frame data (See page ).
When DTC P1603 (Engine Stall History) is stored, DTC P1605 (Rough Idling) is also stored. When confirming freeze frame data, check DTC P1605. The ECM stores DTC P1605 first. Therefore, 5 sets of freeze frame data can be confirmed through DTC P1605, enabling the technician to obtain more information.
When confirming freeze frame data, if there are multiple items related to the cause of the malfunction, perform troubleshooting for all related items.
Try to operate the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and the data when the engine is idling (engine warmed up, no load, and shift lever in D or N) and compare these data with the freeze frame data.
Inspections take into account the fact that the malfunction may not have reoccurred and place emphasis on checking the vehicle conditions present at the time when the malfunction occurred.
When performing inspections, jiggle the relevant wire harnesses and connectors in an attempt to reproduce malfunctions that do not always occur.

Inspection flow:

Using freeze frame data, narrow down the parts to be inspected according to the vehicle conditions at the time when the malfunction occurred.

P1603:

If the engine stalled when the intake air volume was low (during idling or deceleration), there may be a decrease in torque due to an incorrect air-fuel ratio, etc.
If the engine stalled when the intake air volume was high (during driving or acceleration), there may be a major malfunction such as continuous misfire due to ignition stoppage, fuel injection stoppage, etc. and the torque drops to zero.

If the engine speed decreased slowly, there may have been a decrease in torque due to an air-fuel ratio that was incorrect (by approximately 20 to 30%), etc.
If the engine speed decreased rapidly, there may have been a malfunction such as when the engine misfires almost continuously due to ignition stoppage, fuel injection stoppage, etc., or when the external load increases due to an external part malfunctioning.

If the air-fuel ratio is abnormal, there may have been an intake air leak, sensor malfunction, or fuel supply problem.
If the vehicle was normal, the air volume may have been insufficient or the ignition timing may have been incorrect.

P1603 inspection flow: Narrow down the parts to be inspected according to the vehicle conditions at the time when the malfunction occurred (freeze frame data).

Vehicle State	Engine Speed	Suspected Area		Primary Parts to Inspect	Procedure
Idling or decelerating	Slowly decreases and engine stalls	Ignition system abnormal	Igniter abnormal	Power supply circuit Ignition coil assemblies Spark plug	10, 38, 52
		Air-fuel ratio abnormal	Air suction	Intake system connections Purge VSV system Brake booster	5 to 9
			Sensor malfunction (value from sensor too lean)	Mass air flow meter Engine coolant temperature sensor Air fuel ratio sensor system Water inlet with thermostat sub-assembly	11 to 23
			Sensor malfunction (value from sensor too rich)		39 to 51
			Fuel supply problem	Fuel pump control circuit Purge VSV system Fuel line ECM	24 to 37
		Intake air volume insufficient	Problem with air passage	Intake system connections Mass air flow meter Brake booster PCV valve and hose Purge VSV system	53 to 55
			Excessive valve overlap	Camshaft timing oil control valve	56 to 59
			Abnormal combustion	EGR valve	60, 61
		Ignition timing incorrect	Does not operate as expected	Knock sensor Engine coolant temperature sensor Mass air flow meter	62 to 66
	Rapidly decreases and engine stalls*	Ignition and injection stops (electrical system malfunction)	Power temporarily cut	Power supply circuit (fuel injector assembly, ignition coil assembly)	67, 68
	Rapidly decreases and engine stalls*	External part malfunctioning	Increase in load	Air conditioning system Electrical load signal system Power steering system A/T system Park/neutral position switch assembly	69 to 81
Accelerating	-	Crankshaft position sensor or VVT sensor malfunction	Power temporarily cut	Check DTCs	1
		Mass air flow meter	Foreign matter adhesion	Mass air flow meter	72 to 75
		Ignition and injection stops (electrical system malfunction)	Power temporarily cut	Power supply circuit (fuel injector assembly, ignition coil assembly)	76, 77
		Fuel supply problem	Fuel leak, clog	Fuel pump control circuit Fuel line	78 to 82

*: If the engine stalls immediately after the injection method is switched from port injection to direct injection, the injector driver may be malfunctioning.

P1605:

If the engine speed decreased slowly, there may have been a decrease in torque due to an air-fuel ratio that was incorrect (by approximately 20 to 30%), etc.
If the engine speed decreased rapidly, there may have been a malfunction such as when the engine misfires almost continuously due to ignition stoppage, fuel injection stoppage, etc., or when the external load increases due to an external part malfunctioning.

If the air-fuel ratio is abnormal, there may have been an intake air leak, sensor malfunction, or fuel supply problem.
If the vehicle was normal, the air volume may have been insufficient or the ignition timing may have been incorrect.

P1605 inspection flow: Narrow down the parts to be inspected according to the vehicle conditions at the time when the malfunction occurred (freeze frame data).

Engine Speed	Suspected Area		Primary Parts to Inspect	Procedure
Slowly decreases and engine stalls	Ignition system abnormal	Igniter abnormal	Power supply circuit Ignition coil assemblies Spark plug	10, 38, 52
	Air-fuel ratio abnormal	Air suction	Intake system connections Purge VSV system Brake booster	5 to 9
		Sensor malfunction (value from sensor too lean)	Mass air flow meter Engine coolant temperature sensor Air fuel ratio sensor system Water inlet with thermostat sub-assembly	11 to 23
		Sensor malfunction (value from sensor too rich)		39 to 51
		Fuel supply problem	Fuel pump control circuit Purge VSV system Fuel line ECM	24 to 37
	Intake air volume insufficient	Problem with air passage	Intake system connections Mass air flow meter Brake booster PCV valve and hose Purge VSV system	53 to 55
		Excessive valve overlap	Camshaft timing oil control valve	56 to 59
		Abnormal combustion	EGR valve assembly	60, 61
	Ignition timing incorrect	Does not operate as expected	Knock sensor Engine coolant temperature sensor Mass air flow meter	62 to 66
Rapidly decreases and engine stalls*	Ignition and injection stops (electrical system malfunction)	Power temporarily cut	Power supply circuit (fuel injector assembly, ignition coil assembly)	67, 68
Rapidly decreases and engine stalls*	External part malfunctioning	Increase in load	Air conditioning system Electrical load signal system Power steering system A/T system Park/neutral position switch assembly	69 to 81

*: If the engine stalls immediately after the injection method is switched from port injection to direct injection, the injector driver may be malfunctioning.

NOTICE:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1.	CHECK FOR ANY OTHER DTCS OUTPUT

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

Result

Result	Proceed to
Only DTC P1603 and/or P1605 is output	A
DTCs other than P1603 and/or P1605 are output	B

HINT:

If any DTCs other than P1603 or P1605 are output, troubleshoot those DTCs first.

GO TO DTC CHART

2.	CHECK FREEZE FRAME DATA

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (See page ).

OK:

Immobiliser Fuel Cut is OFF.

Result

Result	Proceed to
Abnormal	A
Normal	B

GO TO STEP 4

3.	CHECK ENGINE IMMOBILISER SYSTEM

(a) Connect the Techstream to the DLC3.

(b) Start the engine.

(d) Enter the following menus: Powertrain / Engine and ECT / Data List / Immobiliser Communication and Immobiliser Fuel Cut.

(e) Check the Data List indication.

Result

Data List Item	Result
Immobiliser Communication	ON
Immobiliser Fuel Cut	OFF

CHECK ENGINE IMMOBILISER SYSTEM

4.	READ FREEZE FRAME DATA

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (See page ).

Result

Problem Symptom	Freeze Frame Data Item for DTC P1605			Suspected Area	Proceed to
Problem Symptom	Closed Throttle Position SW	Engine Speed	Total of Short FT and Long FT	Suspected Area	Proceed to
When idling or decelerating, engine speed slowly decreases and engine stalls	All 5 sets of freeze frame data are ON	Decreases slowly*1	All 5 sets of freeze frame data are +15% or more*2	Air suction Sensor malfunction (value from sensor too lean) Fuel supply problem	A
			At least 1 of the 5 sets of freeze frame data is -15% or less*3	Sensor malfunction (value from sensor too rich)	B
			All 5 sets of freeze frame data are from -15% to +15%	Intake air volume insufficient Ignition timing incorrect	C
When idling or decelerating, engine speed rapidly decreases and engine stalls		Decreases rapidly*1	-	Injection stoppage, ignition stoppage Load from external parts	D
When accelerating or driving at constant speed, engine stalls*4	At least one is OFF	-	-	Sensor malfunction Injection stoppage, ignition stoppage Fuel supply problem	E

HINT:

*1: A rapid decrease in engine speed may be caused by an electrical fault in the shared wiring of all or a number of cylinders, an increase in load from external parts, etc. The engine speed is considered to have decreased rapidly if either of the following conditions applies.
Otherwise, the engine speed is considered to have decreased slowly.
1. In the freeze frame data, the decrease in engine speed from #3 to #5 is 400 rpm or more.
2. In the freeze frame data, the engine speed at #5 is 120 rpm or less.

If the vehicle speed is 30 km/h or less and the difference between Engine Speed and SPD (NT) is 100 rpm or less, inspect the automatic transmission. (Depending on the rate of vehicle deceleration, the engine speed may have decreased due to the A/T lock-up release being late.)
*2: When a DTC is stored, feedback compensation increases because the air-fuel ratio is determined to be lean.
*3: When a DTC is stored, feedback compensation decreases because the air-fuel ratio is determined to be rich.
*4: This item should be checked when DTC P1603 is output and is not necessary to check when only P1605 is output.

GO TO STEP 38

GO TO STEP 52

GO TO STEP 67

GO TO STEP 72

5.	CHECK INTAKE SYSTEM

(a) Check for air leakage in the intake system [vacuum hose disconnection, cracks, damaged gaskets, etc.] (See page ).

HINT:

If the accelerator pedal is released after racing the engine, the inspection is easier to perform because the vacuum inside the intake pipes increases and the air suction noise becomes louder.
If Short FT and Long FT are largely different from the normal values when idling (the intake air volume is small) and almost the same as the normal values when racing the engine (the intake air volume is high), air leakage may be present.

OK:

There is no air leakage.

REPAIR OR REPLACE INTAKE SYSTEM

6.	CHECK PURGE VSV

(a) Disconnect the purge hose (on the canister side) of the purge VSV.

(b) Start the engine.

(d) Disconnect the connector of the purge VSV.

(e) Check if air flows through the purge VSV.

OK:

Air does not flow.

(f) Connect the connector of the purge VSV.

(g) Connect the purge hose of the purge VSV.

HINT:

When this inspection is performed, the MIL may illuminate. After finishing the inspection, check and clear DTCs (See page ).

REPLACE PURGE VSV

7.	READ FREEZE FRAME DATA

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (See page ).

Result

Freeze Frame Data Item for DTC P1605	Result	Suspected Area	Proceed to
Stop Light Switch	At least 1 of the 5 sets of freeze frame data is ON	Air suction from brake booster	A
Stop Light Switch	All 5 sets of freeze frame data are OFF	-	B

GO TO STEP 10

8.	READ VALUE USING TECHSTREAM (SHORT FT)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

HINT:

The A/C switch and all accessory switches should be off.

(d) Idle the engine.

(e) Using the Techstream, read the value of Short FT B1S1 and Short FT B2S1 in the Data List while depressing the brake pedal.

Standard:

Short FT B1S1 and Short FT B2S1 changes by +10% or less.

HINT:

When air leakage from the brake booster is present, the feedback compensation increases because the air-fuel ratio becomes lean.

INSPECT BRAKE BOOSTER ASSEMBLY

9.	PERFORM DRIVE TEST

(a) Connect the Techstream to the DLC3.

(b) Start the engine and warm it up until the engine coolant temperature stabilizes.

HINT:

The A/C switch and all accessory switches should be off.

(d) Using the Techstream, read the value of Short FT B1S1 and Short FT B2S1 in the Data List.

Standard:

Data List	Condition	Specified Condition
Short FT B1S1 + Long FT B1S1	The conditions of the vehicle are matched to those present when the problem occurs	-15 to +15%
Short FT B2S1 + Long FT B2S1	The conditions of the vehicle are matched to those present when the problem occurs	-15 to +15%

INSPECT BRAKE BOOSTER ASSEMBLY

10.	CHECK IGNITION SYSTEM

(a) Perform ignition system On-vehicle Inspection (See page ).

HINT:

Perform "Inspection After Repair" after repairing or replacing the ignition system (See page ).

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

11.	READ FREEZE FRAME DATA

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (See page ).

Result

Freeze Frame Data Item for DTC P1605

Result

Suspected Area

Proceed to

Calculate Load

Below 90% of the current value of the vehicle*1

Mass air flow meter

AFS Voltage B1S1

AFS Voltage B2S1

3.3 V or higher*2

Air fuel ratio sensor
Wire harness or connector

HINT:

*1: If the mass air flow meter is malfunctioning and incorrectly measures the pressure to be less than the actual intake manifold pressure, the freeze frame data will show a low engine load value.
*2: If the air fuel ratio sensor is malfunctioning and constantly outputs a value indicating the air-fuel ratio is lean, the actual air-fuel ratio will become rich and the engine may stall.

GO TO STEP 15

12.	CHECK MASS AIR FLOW METER

(a) Remove the mass air flow meter.

(b) Check for foreign matter in the airflow passage of the mass airflow meter.

Result

Result	Proceed to
Visible foreign matter is not present	A
Visible foreign matter is present	B

HINT:

Perform "Inspection After Repair" after replacing the mass air flow meter (See page ).

REPLACE MASS AIR FLOW METER

13.	CHECK HARNESS AND CONNECTOR (ECM - MASS AIR FLOW METER)

(a) Check the harnesses and connectors, referring to DTC P0102 inspection procedure (See page ).

HINT:

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
Make sure there is not an excessive amount of force applied to the wire harness.

REPAIR OR REPLACE HARNESS OR CONNECTOR

14.	PERFORM DRIVE TEST

(a) Connect the Techstream to the DLC3.

(b) Start the engine and warm it up until the engine coolant temperature stabilizes.

HINT:

The A/C switch and all accessory switches should be off.

(d) Using the Techstream, read the value of Calculate Load in the Data List.

Standard:

Data List	Specified Condition
Calculate Load	90 to 110% of the current value of the vehicle

Result

Result	Proceed to
Abnormal	A
Normal	B

HINT:

Perform "Inspection After Repair" after replacing the mass air flow meter (See page ).

REPLACE MASS AIR FLOW METER

GO TO STEP 18

15.	PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION VOLUME FOR A/F SENSOR)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Start the engine, turn off all accessory switches and warm up the engine until the engine coolant temperature stabilizes.

(d) Idle the engine.

(e) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor.

(f) Read the output voltage from the air fuel ratio sensor when increasing and decreasing the fuel injection volume.

Standard:

Techstream Display	Specified Condition
Control the Injection Volume for A/F Sensor (+12.5%)	Air fuel ratio sensor output voltage is below 3.1 V
Control the Injection Volume for A/F Sensor (-12.5%)	Air fuel ratio sensor output voltage is higher than 3.4 V

Result

Result	Proceed to
Abnormal	A
Normal	B

HINT:

The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor has a maximum output delay of approximately 20 seconds.

GO TO STEP 18

16.	CHECK TERMINAL VOLTAGE (AIR FUEL RATIO SENSOR POWER SOURCE)

(a) Check the harnesses and connectors, referring to DTC P0031 inspection procedure (See page ).

HINT:

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
Make sure there is not an excessive amount of force applied to the wire harness.

REPAIR AIR FUEL RATIO SENSOR POWER SOURCE CIRCUIT

17.	CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - ECM)

(a) Check the harnesses and connectors, referring to DTC P2237 inspection procedure (See page ).

HINT:

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
Make sure there is not an excessive amount of force applied to the wire harness.

REPAIR OR REPLACE HARNESS OR CONNECTOR

18.	READ FREEZE FRAME DATA

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (See page ).

Result

Freeze Frame Data Item for DTC P1605	Result	Proceed to
Initial Engine Coolant Temp, Ambient Temp for A/C, Initial Intake Air Temp	Difference in temperature between each item is less than 10°C*1	A
	Difference in temperature between each item is 10°C or more*2	B

HINT:

*1: A long time had elapsed after stopping the engine.
*2: A long time had not elapsed after stopping the engine.

GO TO STEP 21

19.	READ FREEZE FRAME DATA

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (See page ).

Result

Freeze Frame Data Item for DTC P1605	Result	Suspected Area	Proceed to
Initial Engine Coolant Temp, Coolant Temp, Engine Run Time	Range A	Engine coolant temperature sensor Water inlet with thermostat sub-assembly	A
	Range B	Engine coolant temperature sensor	B
	Range C	-	C

HINT:

This step is not directly related to engine stall.

GO TO STEP 22

GO TO STEP 24

20.	INSPECT WATER INLET WITH THERMOSTAT SUB-ASSEMBLY

HINT:

For the water inlet with thermostat sub-assembly inspection, refer to the following procedures (See page ).

Result

Result	Proceed to
Abnormal	A
Normal	B

REPLACE WATER INLET WITH THERMOSTAT SUB-ASSEMBLY

GO TO STEP 22

21.	READ FREEZE FRAME DATA

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (See page ).

Result

Freeze Frame Data Item for DTC P1605	Result	Suspected Area	Proceed to
Coolant Temp	120°C or higher	Engine coolant temperature sensor	A
Coolant Temp, Ambient Temp for A/C	Engine coolant temperature is lower than outside temperature by 15°C or more	Engine coolant temperature sensor	A
Both freeze frame data items listed above	Values are other than above	-	B

GO TO STEP 24

22.	INSPECT ENGINE COOLANT TEMPERATURE SENSOR

HINT:

For the engine coolant temperature sensor inspection, refer to the following procedures (See page ).

Result

Result	Proceed to
Normal	A
Abnormal	B

HINT:

Perform "Inspection After Repair" after replacing the engine coolant temperature sensor (See page ).

REPLACE ENGINE COOLANT TEMPERATURE SENSOR

23.	CHECK HARNESS AND CONNECTOR (ECM - ENGINE COOLANT TEMPERATURE SENSOR)

(a) Disconnect the ECM connector.

(b) Disconnect the engine coolant temperature sensor connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
D74-76 (THW) - D28-2	Always	Below 1 Ω
D74-98 (E2) - D28-1	Always	Below 1 Ω
D74-76 (THW) or D28-2 - Body ground	Always	10 kΩ or higher

HINT:

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
Make sure there is not an excessive amount of force applied to the wire harness.

REPAIR OR REPLACE HARNESS OR CONNECTOR

24.	READ FREEZE FRAME DATA

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (See page ).

Result

Freeze Frame Data Item for DTC P1605	Result	Suspected Area	Proceed to
EVAP (Purge) VSV	At least 1 of the 5 sets of freeze frame data is not 0%	Purge VSV	A
EVAP (Purge) VSV	All 5 sets of freeze frame data are 0%	-	B

HINT:

If the purge VSV is stuck closed, air-fuel ratio compensation by the purge VSV is incorrectly adjusted, and then the air-fuel ratio becomes lean and the engine may stall.

GO TO STEP 33

25.	PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE VSV FOR EVAP CONTROL)

(a) Disconnect the purge hose (on the canister side) of the purge VSV.

(b) Connect the Techstream to the DLC3.

(d) Start the engine.

(e) Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the VSV for Evap Control.

(f) Operate the purge VSV and check the airflow.

OK:

Activate the VSV for Evap Control	Specified Condition
ON	Air flows
OFF	Air does not flow

Result

Result	Proceed to
NG	A
OK	B

HINT:

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

GO TO STEP 33

26.	INSPECT PURGE VSV

(a) Inspect the purge VSV (See page ).

REPLACE PURGE VSV

27.	CHECK TERMINAL VOLTAGE (PURGE VSV POWER SOURCE)

(a) Disconnect the purge VSV connector.

(b) Turn the ignition switch ON.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
D29-1 - Body ground	ignition switch ON	11 to 14 V

Text in Illustration

*a	Front view of wire harness connector (to Purge VSV)

HINT:

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
Make sure there is not an excessive amount of force applied to the wire harness.

REPAIR OR REPLACE HARNESS OR CONNECTOR (PURGE VSV - INTEGRATION RELAY)

28.	CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM)

(a) Check harness and connector, referring to EVAP System inspection procedure (See page ).

HINT:

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
Make sure there is not an excessive amount of force applied to the wire harness.

REPAIR OR REPLACE HARNESS OR CONNECTOR

29.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(d) Clear the DTCs (See page ).

30.	READ VALUE USING TECHSTREAM (EVAP (Purge) VSV)

(a) Connect the Techstream to the DLC3.

(b) Start the engine and warm it up until the engine coolant temperature stabilizes.

HINT:

The A/C switch and all accessory switches should be off.

(d) Using the Techstream, read the value of EVAP (Purge) VSV in the Data List.

Standard:

Data List	Specified Condition
EVAP (Purge) VSV	Value other than 0% is displayed

Result

Result	Proceed to
Abnormal	A
Normal	B

CHECK FOR INTERMITTENT PROBLEMS

31.	PERFORM ACTIVE TEST USING TECHSTREAM

(a) Disconnect the purge hose (on the canister side) of the purge VSV.

(b) Connect the Techstream to the DLC3.

(d) Start the engine.

(e) Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the VSV for Evap Control.

(f) Operate the purge VSV and check the airflow.

OK:

Activate the VSV for Evap Control	Specified Condition
ON	Air flows
OFF	Air does not flow

Result

Result	Proceed to
NG	A
OK	B

HINT:

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

CHECK FOR INTERMITTENT PROBLEMS

32.	CHECK CONNECTOR CONNECTION CONDITION (ECM)

(a) Check the ECM connector connection condition.

HINT:

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
Make sure there is not an excessive amount of force applied to the wire harness.

REPLACE ECM

RECONNECT CONNECTOR CORRECTLY

33.	PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP DUTY)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(d) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump Duty.

(e) When performing the Active Test, check for an operating sound from the fuel pump.

Standard:

Control the Fuel Pump Duty	Specified Condition
25 or 80%	Operating sound heard
OFF	Operating sound not heard

Result

Result	Proceed to
Abnormal	A
Normal	B

HINT:

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
While performing the Active Test, make sure that there is no fuel leakage from the pipes, no signs that fuel has leaked, and no fuel smell.
If the fuel pump operating noise is abnormal, proceed to step 34.

GO TO STEP 35

34.	INSPECT FUEL PUMP

(a) Inspect the fuel pump (See page ).

HINT:

Perform "Inspection After Repair" after replacing the fuel pump (See page ).

CHECK FUEL PUMP CONTROL CIRCUIT

REPLACE FUEL PUMP

35.	CHECK FUEL SYSTEM

(a) Check the fuel system.

Check the fuel pump operation.
Check the fuel leaks.
Check the fuel pressure.
Perform the Active Test (Control the Select Cylinder Fuel Cut).

HINT:

For the fuel system On-vehicle Inspection, refer to the following procedures (See page ).

Result

Result	Proceed to
Abnormal	A
Normal	B

CHECK FOR INTERMITTENT PROBLEMS

36.	CHECK FUEL SYSTEM

(a) Check for foreign matter such as iron particles around the fuel pump (fuel pump, fuel pump filter and inside the fuel tank), and for signs that the fuel pump was stuck.

Result

Result	Proceed to
There is foreign matter or signs that fuel pump was stuck	A
There is no foreign matter and no signs that fuel pump was stuck	B

HINT:

If there is foreign matter such as iron particles on the fuel pump, fuel filter or fuel tank, remove the foreign matter.

REPAIR OR REPLACE FUEL SYSTEM

37.	CHECK FUEL SYSTEM

(a) Check the fuel system.

Check the fuel pump operation.
Check the fuel leaks.
Check the fuel pressure.
Perform the Active Test (Control the Select Cylinder Fuel Cut).

HINT:

For the fuel system On-vehicle Inspection, refer to the following procedures (See page ).

END

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

38.	CHECK IGNITION SYSTEM

(a) Perform ignition system On-vehicle Inspection (See page ).

HINT:

Perform "Inspection After Repair" after repairing or replacing the ignition system (See page ).

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

39.	READ FREEZE FRAME DATA

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (See page ).

Result

Freeze Frame Data Item for DTC P1605

Result

Suspected Area

Proceed to

Calculate Load

110% or more of the current value of the vehicle*1

Mass air flow meter

AFS Voltage B1S1

AFS Voltage B2S1

Below 3.3 V*2

Air fuel ratio sensor
Harness and connector

Both freeze frame data items listed above

Values are other than above

HINT:

*1: If the mass air flow meter is malfunctioning and incorrectly measures the intake air volume to be higher than the actual volume of air flowing through the intake manifold, the freeze frame data will show a high engine load value.
*2: As the air fuel ratio sensor output is low before the sensor warms up, the value at that time cannot be used for diagnosis. If the air fuel ratio sensor is malfunctioning and constantly outputs a value indicating the air-fuel ratio is rich, the actual air-fuel ratio will become lean and the engine may stall.

GO TO STEP 43

GO TO STEP 46

40.	CHECK MASS AIR FLOW METER

(a) Remove the mass airflow meter.

(b) Check for foreign matter in the airflow passage of the mass air flow meter.

Result

Result	Proceed to
Visible foreign matter is not present	A
Visible foreign matter is present	B

HINT:

Perform "Inspection After Repair" after replacing the mass air flow meter (See page ).

REPLACE MASS AIR FLOW METER

41.	CHECK HARNESS AND CONNECTOR (ECM - MASS AIR FLOW METER)

(a) Check the harnesses and connectors, referring to DTC P0102 inspection procedure (See page ).

HINT:

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
Make sure there is not an excessive amount of force applied to the wire harness.

REPAIR OR REPLACE HARNESS OR CONNECTOR

42.	PERFORM DRIVE TEST

(a) Connect the Techstream to the DLC3.

(b) Start the engine and warm it up until the engine coolant temperature stabilizes.

HINT:

The A/C switch and all accessory switches should be off.

(d) Using the Techstream, read the value of Calculate Load in the Data List.

Standard:

Data List	Specified Condition
Calculate Load	90 to 110% of the current value of the vehicle

HINT:

Perform "Inspection After Repair" after replacing the mass air flow meter (See page ).

REPLACE MASS AIR FLOW METER

43.	PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION VOLUME FOR A/F SENSOR)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Start the engine, turn off all accessory switches and warm up the engine until the engine coolant temperature stabilizes.

(d) Idle the engine.

(e) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor.

(f) Read the output voltage from the air fuel ratio sensor when increasing and decreasing the fuel injection volume.

Standard:

Techstream Display	Specified Condition
Control the Injection Volume for A/F Sensor (+12.5%)	Air fuel ratio sensor output voltage is below 3.1 V
Control the Injection Volume for A/F Sensor (-12.5%)	Air fuel ratio sensor output voltage is higher than 3.4 V

Result

Result	Proceed to
Abnormal	A
Normal	B

HINT:

The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor has a maximum output delay of approximately 20 seconds.

GO TO STEP 46

44.	CHECK TERMINAL VOLTAGE (AIR FUEL RATIO SENSOR POWER SOURCE)

(a) Check the harnesses and connectors, referring to DTC P0031 inspection procedure (See page ).

HINT:

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
Make sure there is not an excessive amount of force applied to the wire harness.

REPAIR AIR FUEL RATIO SENSOR POWER SOURCE CIRCUIT

45.	CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - ECM)

(a) Check the harnesses and connectors, referring to DTC P2237 inspection procedure (See page ).

HINT:

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
Make sure there is not an excessive amount of force applied to the wire harness.

REPAIR OR REPLACE HARNESS OR CONNECTOR

46.	READ FREEZE FRAME DATA

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (See page ).

Result

Freeze Frame Data Item for DTC P1605	Result	Proceed to
Initial Engine Coolant Temp, Ambient Temp for A/C, Initial Intake Air Temp	Difference in temperature between each item is less than 10°C*1	A
	Difference in temperature between each item is 10°C or more*2	B

HINT:

*1: A long time had elapsed after stopping the engine.
*2: A long time had not elapsed after stopping the engine.

GO TO STEP 49

47.	READ FREEZE FRAME DATA

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (See page ).

Result

Freeze Frame Data Item for DTC P1605	Result	Suspected Area	Proceed to
Initial Engine Coolant Temp, Coolant Temp, Engine Run Time	Range A	Engine coolant temperature sensor Water inlet with thermostat sub-assembly	A
	Range B	Engine coolant temperature	B
	Range C	-	C

HINT:

This step is not directly related to engine stall.

GO TO STEP 50

GO TO STEP 80

48.	INSPECT WATER INLET WITH THERMOSTAT SUB-ASSEMBLY

HINT:

For the water inlet with thermostat sub-assembly inspection, refer to the following procedures (See page ).

Result

Result	Proceed to
Abnormal	A
Normal	B

HINT:

This step is not directly related to engine stall.

REPLACE WATER INLET WITH THERMOSTAT SUB-ASSEMBLY

GO TO STEP 50

49.	READ FREEZE FRAME DATA

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (See page ).

Result

Freeze Frame Data Item for DTC P1605	Result	Suspected Area	Proceed to
Coolant Temp	120°C or higher	Engine coolant temperature sensor	A
Coolant Temp, Ambient Temp for A/C	Engine coolant temperature is lower than outside temperature by 15°C or more	Engine coolant temperature sensor	A
Both freeze frame data items listed above	Values are other than above	-	B

GO TO STEP 83

50.	INSPECT ENGINE COOLANT TEMPERATURE SENSOR

HINT:

For the engine coolant temperature sensor inspection, refer to the following procedures (See page ).

Result

Result	Proceed to
Normal	A
Abnormal	B

HINT:

Perform "Inspection After Repair" after replacing the engine coolant temperature sensor (See page ).

REPLACE ENGINE COOLANT TEMPERATURE SENSOR

51.	CHECK HARNESS AND CONNECTOR (ECM - ENGINE COOLANT TEMPERATURE SENSOR)

(a) Disconnect the ECM connector.

(b) Disconnect the engine coolant temperature sensor connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
D74-76 (THW) - D28-2	Always	Below 1 Ω
D74-98 (E2) - D28-1	Always	Below 1 Ω
D74-76 (THW) or D28-2 - Body ground	Always	10 kΩ or higher

HINT:

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
Make sure there is not an excessive amount of force applied to the wire harness.

CHECK FOR INTERMITTENT PROBLEMS

REPAIR OR REPLACE HARNESS OR CONNECTOR

52.	CHECK IGNITION SYSTEM

(a) Perform ignition system On-vehicle Inspection (See page ).

HINT:

Perform "Inspection After Repair" after repairing or replacing the ignition system (See page ).

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

53.	READ FREEZE FRAME DATA

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (See page ).

Result

Freeze Frame Data Item for DTC P1605	Result	Suspected Area	Proceed to
Total of ISC Learning Value and ISC Feedback Value	Below 80% of the current value of the vehicle	Intake air volume insufficient	A
Total of ISC Learning Value and ISC Feedback Value	80% or more of the current value of the vehicle	Intake air volume insufficient	B

GO TO STEP 56

54.	CHECK INTAKE SYSTEM

(a) Check for air leakage in the intake system [vacuum hose disconnection, cracks, damaged gaskets, etc.] (See page ).

HINT:

If the accelerator pedal is released after racing the engine, the inspection is easier to perform because the vacuum inside the intake pipes increases and the air suction noise becomes louder.
If Short FT and Long FT are largely different from the normal values when idling (the intake air volume is small) and almost the same as the normal values when racing the engine (the intake air volume is high), air leakage may be present.

OK:

There is no air leakage.

HINT:

Perform "Inspection After Repair" after repairing or replacing the intake system (See page ).

REPAIR OR REPLACE INTAKE SYSTEM

55.	CHECK INTAKE SYSTEM

(a) Check the intake system.

Inspect the brake booster assembly.
Inspect the mass air flow meter.
Check the PCV hose.
Inspect the PCV valve.
Inspect the purge VSV.

Result

Result	Proceed to
Abnormal	A
Normal	B

HINT:

Perform "Inspection After Repair" after replacing the mass air flow meter (See page ).

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

GO TO STEP 62

56.	PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE VVT LINEAR)

(a) Connect the Techstream to the DLC3.

(b) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT Linear (Bank1) or Control the VVT Linear (Bank2).

HINT:

When performing the Active Test, make sure the A/C is on and the shift lever is in P or N.

(e) Check the engine speed while operating the camshaft timing oil control valve using the Techstream.

OK:

Techstream Operation	Specified Condition
0%	Normal engine speed
100%	Engine idles roughly or stalls

HINT:

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
When the results of the inspection using the Active Test are normal but the valve operating noise is abnormal, check the valve for any signs of problems.
If the camshaft timing oil control valve is stuck on, the valve overlap increases and combustion worsens due to the internal EGR which may cause rough idle or cause the engine to stall.

REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE SIDE)

57.	CHECK HARNESS AND CONNECTOR (CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE SIDE) - ECM)

(a) Check the harnesses and connectors, referring to DTC P0010 inspection procedure (See page ).

HINT:

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
Make sure there is not an excessive amount of force applied to the wire harness.

REPAIR OR REPLACE HARNESS OR CONNECTOR

58.	PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE VVT EXHAUST LINEAR)

(a) Connect the Techstream to the DLC3.

(b) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT Exhaust Linear (Bank1) or Control the VVT Exhaust Linear (Bank2).

HINT:

When performing the Active Test, make sure the A/C is on and the shift lever is in P or N.

(e) Check the engine speed while operating the camshaft timing oil control valve using the Techstream.

OK:

Techstream Operation	Specified Condition
0%	Normal engine speed
100%	Engine idles roughly or stalls

HINT:

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
When the results of the inspection using the Active Test are normal but the valve operating noise is abnormal, check the valve for any signs of problems.
If the camshaft timing oil control valve is stuck on, the valve overlap increases and combustion worsens due to the internal EGR which may cause rough idle or cause the engine to stall.

REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR EXHAUST SIDE)

59.	CHECK HARNESS AND CONNECTOR (CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR EXHAUST SIDE) - ECM)

(a) Check the harnesses and connectors, referring to DTC P0013 inspection procedure (See page ).

HINT:

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
Make sure there is not an excessive amount of force applied to the wire harness.

REPAIR OR REPLACE HARNESS OR CONNECTOR

60.	PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE EGR STEP POSITION)

(a) Connect the Techstream to the DLC3.

(b) Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.

HINT:

When performing the Active Test, make sure the shift lever is in P or N.
The A/C switch and all accessory switches should be off.

(d) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position.

(e) Confirm the Throttle Idle Position is ON and check the engine idling condition and MAP values in the Data List while performing the Active Test.

HINT:

Do not leave the EGR valve open for 10 seconds or more during the Active Test.
Be sure to return the EGR valve to step 0 when the Active Test is completed.

OK:

MAP and idling condition change in response to EGR step position as follows.

Standard

EGR Step Position (Active Test)

0 Steps

0 to 30 Steps

Idling condition

Steady idling

Idling changes from steady to rough idling or engine stall

MAP

(Data List)

20 to 40 kPa (150 to 300 mmHg)

MAP value is at least +10 kPa (75 mmHg) higher than when EGR valve is fully closed

GO TO STEP 62

61.	INSPECT EGR VALVE ASSEMBLY

(a) Remove the EGR valve assembly (See page ).

(b) Check if the EGR valve assembly is stuck open.

OK:

EGR valve is tightly closed.

HINT:

Perform "Inspection After Repair" after replacing the EGR valve assembly (See page ).

REPLACE EGR VALVE ASSEMBLY

62.	READ FREEZE FRAME DATA

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (See page ).

Result

Freeze Frame Data Item for DTC P1605		Suspected Area	Proceed to
IGN Advance	Knock Correct Learn Value	Suspected Area	Proceed to
Differs from the current value of the vehicle by 10° or more	Less than 3°	Engine coolant temperature sensor Mass air flow meter Knock sensor	A
	3° or more	-	B
Differs from the current value of the vehicle by less than 10°	-	-	B

CHECK FOR INTERMITTENT PROBLEMS

63.	INSPECT ENGINE COOLANT TEMPERATURE SENSOR

HINT:

For the engine coolant temperature sensor inspection, refer to the following procedures (See page ).
Perform "Inspection After Repair" after replacing the engine coolant temperature sensor (See page ).

REPLACE ENGINE COOLANT TEMPERATURE SENSOR

64.	CHECK HARNESS AND CONNECTOR (ECM - ENGINE COOLANT TEMPERATURE SENSOR)

(a) Disconnect the ECM connector.

(b) Disconnect the engine coolant temperature sensor connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
D74-76 (THW) - D28-2	Always	Below 1 Ω
D74-98 (E2) - D28-1	Always	Below 1 Ω
D74-76 (THW) or D28-2 - Body ground	Always	10 kΩ or higher

HINT:

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
Make sure there is not an excessive amount of force applied to the wire harness.

REPAIR OR REPLACE HARNESS OR CONNECTOR

65.	INSPECT MASS AIR FLOW METER (INTAKE AIR TEMPERATURE SENSOR)

(a) Inspect the mass air flow meter (See page ).

HINT:

If the intake air temperature sent to the ECM is higher than the standard due to the mass air flow meter (intake air temperature sensor) malfunctioning, the ignition timing may become delayed.
Perform "Inspection After Repair" after replacing the mass air flow meter (See page ).

REPLACE MASS AIR FLOW METER

66.	READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Start the engine and warm it up until the engine coolant temperature stabilizes.

HINT:

The A/C switch and all accessory switches should be off.

(d) Using the Techstream, read the value of IGN Advance and Knock Correct Learn Value in the Data List.

Result

Freeze Frame Data Item for DTC P1605		Proceed to
IGN Advance	Knock Correct Learn Value	Proceed to
Differs from the current value of the vehicle by 10° or more	Less than 3°	A
	3° or more	B
Differs from the current value of the vehicle by less than 10°	-	B

HINT:

If the results of the checks performed in steps 56 to 64 were all normal and the sum of ISC Feedback Value and ISC Learning Value in the Data List is 120% of the normal value or more, check for carbon deposits in the throttle body assembly. If there are carbon deposits, clean them off to finish the troubleshooting procedure.

CHECK KNOCK SENSOR CIRCUIT

END

67.	CHECK TERMINAL VOLTAGE (FUEL INJECTOR POWER SOURCE)

(a) Check the harnesses and connectors, referring to Fuel Injector Circuit inspection procedure (See page ).

HINT:

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
Make sure there is not an excessive amount of force applied to the wire harness.
A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. (There may be an electrical malfunction in the wiring shared by all the cylinders.)

REPAIR FUEL INJECTOR POWER SOURCE CIRCUIT

68.	CHECK IGNITION SYSTEM

(a) Perform ignition system On-vehicle Inspection (See page ).

HINT:

Perform "Inspection After Repair" after repairing or replacing the ignition system (See page ).

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

69.	CHECK FREEZE FRAME DATA

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (See page ).

Result

Freeze Frame Data Item for DTC P1605			Suspected Area	Proceed to
A/C Signal	Air Conditioner FB Val	Power Steering Signal	Suspected Area	Proceed to
A/C Signal display does not change from OFF	-	Does not change from OFF	-	A
A/C Signal display does not change from OFF	-	Changes from OFF to ON	Power steering system
A/C Signal display changes from OFF to ON*1	Value displayed for Air Conditioner FB Val does not increase	Changes from OFF to ON	Power steering system
		Does not change from OFF	-
	Value displayed for Air Conditioner FB Val increases	-	A/C system	B

HINT:

*1: Check not only the on/off state of the air conditioner but also the change in air conditioner load.
Even if the results are normal, the power steering system and/or A/C system may have been malfunctioning. If there are no problems with other parts, inspect the power steering system and/or A/C system.

CHECK AIR CONDITIONING SYSTEM

70.	CHECK FREEZE FRAME DATA

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (See page ).

Result

Freeze Frame Data Item for DTC P1605				Suspected Area	Proceed to
Electrical Load Signal or Electric Load Feedback Val	Electric Load Feedback Val	Difference between Engine Speed and SPD (NT)	Vehicle Speed	Suspected Area	Proceed to
Electrical Load Signal display changes from OFF to ON3, or value displayed for Electric Load Feedback Val increases3	Value displayed for Electric Load Val changes	-	-	Electrical load signal circuit	D
	Value displayed for Electric Load Val does not change	At least 1 of the 5 sets of freeze frame data is less than 100 rpm	Less than 30 km/h	Automatic transmission system	B1 C2
			30 km/h or more	-	A
		All 5 sets of freeze frame data are 100 rpm or more	-	-	A
Electrical Load Signal display does not change from OFF, or value displayed for Electric Load Feedback Val does not increase	-	At least 1 of the 5 sets of freeze frame data is less than 100 rpm	Less than 30 km/h	Automatic transmission system	B1 C2
			30 km/h or more	-	A
		All 5 sets of freeze frame data are 100 rpm or more	-	-	A

*1: for 2WD
*2: for 4WD

HINT:

*3: If the Electrical Load Signal display changes from OFF to ON, or the "Electric Load Feedback Val" increases, it probably is a malfunction due to a change in electrical load. Check the generator and the continuity and connections between the generator and ECM.
The normal value for the ISC learned value is engine displacement (liters) x 0.9.
Even if the results are normal, the electrical load signal system and/or A/T system may have been malfunctioning. If there are no problems with other parts, inspect the electrical load system and/or A/T system.

CHECK AUTOMATIC TRANSMISSION SYSTEM (FOR 2WD)

CHECK AUTOMATIC TRANSMISSION SYSTEM (FOR 4WD)

CHECK GENERATOR CIRCUIT

71.	CHECK FREEZE FRAME DATA

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (See page ).

Result

Freeze Frame Data Item for DTC P1605		Suspected Area	Proceed to
Shift SW Status (P Range) Shift SW Status (N Range)	Neutral Position SW Signal	Suspected Area	Proceed to
P and N position are both OFF in at least one data set	In D or R, NSW is ON	Park/neutral position switch assembly	A1 B2
P and N position are both OFF in at least one data set	In D or R, NSW is OFF	A/T system	C1 D2
All 5 sets of freeze frame data are ON	-	-	E

*1: for 2WD
*2: for 4WD

HINT:

Even if the results are normal, the park/neutral position switch assembly and/or A/T system may have been malfunctioning. If there are no problems with other parts, inspect the park/neutral position switch assembly and/or A/T system.

CHECK FOR INTERMITTENT PROBLEMS

INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY (FOR 2WD)

INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY (FOR 4WD)

CHECK AUTOMATIC TRANSMISSION SYSTEM (FOR 2WD)

CHECK AUTOMATIC TRANSMISSION SYSTEM (FOR 4WD)

72.	CHECK FREEZE FRAME DATA

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (See page ).

Result

Freeze Frame Data Item	Result	Suspected Area	Proceed to
Throttle Sensor Position, Calculate Load	Calculate Load decreases while Throttle Sensor Position increases	Mass air flow meter	A
Throttle Sensor Position, Calculate Load	Calculate Load does not decrease while Throttle Sensor Position increases	-	B

GO TO STEP 76

73.	CHECK MASS AIR FLOW METER

(a) Remove the mass air flow meter.

(b) Check for foreign matter in the airflow passage of the mass airflow meter.

Result

Result	Proceed to
Visible foreign matter is not present	A
Visible foreign matter is present	B

HINT:

Perform "Inspection After Repair" after replacing the mass air flow meter (See page ).

REPLACE MASS AIR FLOW METER

74.	CHECK HARNESS AND CONNECTOR (ECM - MASS AIR FLOW METER)

(a) Check the harnesses and connectors, referring to DTC P0102 inspection procedure (See page ).

HINT:

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
Make sure there is not an excessive amount of force applied to the wire harness.

REPAIR OR REPLACE HARNESS OR CONNECTOR

75.	PERFORM DRIVE TEST

(a) Connect the Techstream to the DLC3.

(b) Start the engine and warm it up until the engine coolant temperature stabilizes.

HINT:

The A/C switch and all accessory switches should be off.

(d) Using the Techstream, read the value of Calculate Load in the Data List.

Standard:

Data List	Specified Condition
Calculate Load	90 to 110% of the current value of the vehicle

HINT:

Perform "Inspection After Repair" after replacing the mass air flow meter (See page ).

REPLACE MASS AIR FLOW METER

76.	CHECK TERMINAL VOLTAGE (FUEL INJECTOR POWER SOURCE)

(a) Check the harnesses and connectors, referring to Fuel Injector Circuit inspection procedure (See page ).

HINT:

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
Make sure there is not an excessive amount of force applied to the wire harness.
A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. (There may be an electrical malfunction in the wiring shared by all the cylinders.)

REPAIR FUEL INJECTOR POWER SOURCE CIRCUIT

77.	CHECK IGNITION SYSTEM

(a) Perform ignition system On-vehicle Inspection (See page ).

HINT:

Perform "Inspection After Repair" after repairing or replacing the ignition system (See page )

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

78.	PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP DUTY)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(d) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump Duty.

(e) When performing the Active Test, check for an operating sound from the fuel pump.

Standard:

Control the Fuel Pump Duty	Specified Condition
25 or 80%	Operating sound heard
OFF	Operating sound not heard

Result

Result	Proceed to
Abnormal	A
Normal	B

HINT:

Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
While performing the Active Test, make sure that there is no fuel leakage from the pipes, no signs that fuel has leaked, and no fuel smell.
If the fuel pump operating noise is abnormal, proceed to step 77.

GO TO STEP 80

79.	INSPECT FUEL PUMP

(a) Inspect the fuel pump (See page ).

HINT:

Perform "Inspection After Repair" after replacing the fuel pump (See page ).

CHECK FUEL PUMP CONTROL CIRCUIT

REPLACE FUEL PUMP

80.	CHECK FUEL SYSTEM

(a) Check the fuel system.

Check the fuel pump operation.
Check the fuel leaks.
Check the fuel pressure.
Perform the Active Test (Control the Select Cylinder Fuel Cut).

HINT:

For the fuel system On-vehicle Inspection, refer to the following procedures (See page ).

Result

Result	Proceed to
Abnormal	A
Normal	B

CHECK FOR INTERMITTENT PROBLEMS

81.	CHECK FUEL SYSTEM

(a) Check for foreign matter such as iron particles around the fuel pump (fuel pump, fuel pump filter and inside the fuel tank), and for signs that the fuel pump was stuck.

Result

Result	Proceed to
There is foreign matter or signs that fuel pump was stuck	A
There is no foreign matter and no signs that fuel pump was stuck	B

HINT:

If there is foreign matter such as iron particles on the fuel pump, fuel filter or fuel tank, remove the foreign matter.

REPAIR OR REPLACE FUEL SYSTEM

82.	CHECK FUEL SYSTEM

(a) Check the fuel system.

Check the fuel pump operation.
Check the fuel leaks.
Check the fuel pressure.
Perform the Active Test (Control the Select Cylinder Fuel Cut).

HINT:

For the fuel system On-vehicle Inspection, refer to the following procedures (See page ).

END

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

83.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(d) Clear the DTCs (See page ).

END

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DATA LIST / ACTIVE TEST 1. DATA LIST NOTICE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not. HINT: Using the Techstream to read the Data List allows the values or states ...

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