Toyota Tundra Service Manual: MAP - Mass or Volume Air Flow Correlation Bank 1 (P006A)

Toyota Tundra Service Manual / Engine, Hybrid System / 1ur-fe Engine Control / Sfi System / MAP - Mass or Volume Air Flow Correlation Bank 1 (P006A)

DESCRIPTION

DTC No.

DTC Detection Condition

Trouble Area

P006A

After the engine is warmed up and the engine is idled for 30 seconds or more, the intake manifold pressure malfunction determination value is higher than the threshold value due to an intake leak.

(1 trip detection logic)

  • Intake system
  • Mass air flow meter
  • PCV valve and hose
  • PCV hose connections
  • Manifold absolute pressure sensor
  • EGR valve
  • ECM

MONITOR DESCRIPTION

The MIL illuminates when irregular intake manifold pressure is detected due to an intake leak.

HINT:

When the DTC is stored, the following fail-safe operations occur:

  • Idling up is performed.
  • VVT operation is stopped.
  • Updating A/F learning value is prohibited.
  • Fuel cut is prohibited.
  • ISC flow rate is increased (ISC feedback is stopped).

MONITOR STRATEGY

Related DTCs

P006A: MAP - mass or volume air flow correlation

Required Sensors/Components (Main)

  • MAP sensor
  • ECM

Required Sensors/Components (Related)

-

Frequency of Operation

Continuous

Duration

1 second

MIL Operation

Immediately

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever following DTCs not present

P0010, P0020 (VVT oil control valve)

P0011, P0021 (VVT system - Advance)

P0012, P0022 (VVT system - Retard)

P0013, P0023 (Exhaust VVT oil control valve)

P0014, P0024 (Exhaust VVT system - Advance)

P0015, P0025 (Exhaust VVT system - Retard)

P0016, P0018 (VVT system - Misalignment)

P0017, P0019 (Exhaust VVT system - Misalignment)

P0031, P0032, P0051, P0052, P101D, P103D (Air fuel ratio sensor heater)

P0107, P0108 (Manifold absolute pressure)

P0101, P0102, P0103 (Mass air flow meter)

P0112, P0113 (Intake air temperature sensor)

P0115, P0117, P0118 (Engine coolant temperature sensor)

P0120, P0121, P0122, P0123, P0220, P0222, P0223, P2135 (Throttle position sensor)

P0125 (Insufficient Coolant Temperature for Closed Loop Fuel Control)

P014C, P014D, P014E, P014F, P015A, P015B, P015C, P015D, P2195, P2196, P2197, P2198, P2237, P2238, P2239, P2240, P2241, P2242, P2252, P2253, P2255, P2256 (Air fuel ratio sensor)

P0171, P0172, P0174, P0175 (Fuel system)

P0327, P0328, P032C, P032D, P0332, P0333, P033C, P033D (Knock Sensor)

P0335 (Crankshaft position sensor)

P0340, P0342, P0343, P0345, P0347, P0348 (VVT sensor)

P1340 (Camshaft position sensor)

P0351 - P0358 (Igniter)

P0365, P0367, P0368, P0390, P0392, P0393 (Exhaust VVT sensor)

P0412, P0415, P0418, P0419, P1613, P1614 (Secondary Air Injection System Control)

P0500 (Vehicle speed sensor)

P106A (Evaporative Emission System Pressure Sensor)

P2440, P2441, P2442, P2443, P2444, P2445, P2446, P2447 (Secondary Air Injection System)

Time after engine start

5 seconds

Engine coolant temperature

70°C (158°F) or higher

Intake air temperature

5.5°C (41.9°F) or higher

Atmospheric pressure

76 kPa (570 mmHg) or higher

Engine load fluctuation (per 8 msec.)

10% or less

VVT system

Stable

EGR valve

Closed

Engine speed

250 to 2000 rpm

Engine load (normal operation)

35% or less

Engine load (fail-safe)

41% or less

TYPICAL MALFUNCTION THRESHOLDS

Pressure correlation

24 kPa (180 mmHg) or higher

CONFIRMATION DRIVING PATTERN

  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON and turn the Techstream on.
  3. Clear DTCs (even if no DTCs are stored, perform the clear DTC operation).
  4. Turn the ignition switch off and wait for at least 30 seconds.
  5. Turn the ignition switch to ON and turn the Techstream on.
  6. Start the engine and warm it up (until the engine coolant temperature is 75°C (167°F) or higher) with the A/C switch and all accessory switches off and the shift lever in P or N.
  7. Idle the engine for 30 minutes or more [A].
  8. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [B].
  9. Read the pending DTCs.

    HINT:

    • If a pending DTC is output, the system is malfunctioning.
    • If a pending DTC is not output, perform the following procedure.
  10. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
  11. Input the DTC: P006A.
  12. Check the DTC judgment result.

    Tester Display

    Description

    NORMAL

    • DTC judgment completed
    • System normal

    ABNORMAL

    • DTC judgment completed
    • System abnormal

    INCOMPLETE

    • DTC judgment not completed
    • Perform driving pattern after confirming DTC enabling conditions

    N/A

    • Unable to perform DTC judgment
    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    HINT:

    If the judgment result shows INCOMPLETE or N/A, perform steps [A] through [B] again.

  13. If no pending DTC is output, perform a universal trip and check for permanent DTCs (See page ).

    HINT:

    • If a permanent DTC is output, the system is malfunctioning.
    • If no permanent DTC is output, the system is normal.

CAUTION / NOTICE / HINT

HINT:

Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE

1.

CHECK ANY OTHER DTCS OUTPUT

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

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

(e) Drive the vehicle at 60 km/h (37 mph) for 5 minutes or more.

(f) Idle the engine for 30 seconds or more.

(g) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

(h) Read the DTCs.

Result

Proceed to

P006A

A

P006A and other DTCs are output

B

HINT:

If any DTCs other than P006A are output, perform troubleshooting for those DTCs first.

B

GO TO DTC CHART

A

2.

CHECK PCV HOSE (HOSE CONNECTION)

(a) Check the PCV hose connections (See page ).

OK:

PCV hose is connected correctly and is not damaged.

NG

REPAIR OR REPLACE PCV HOSE

OK

3.

CHECK INTAKE SYSTEM

(a) Check the intake system for vacuum leaks (See page ).

OK:

No leaks in intake system.

HINT:

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

NG

REPAIR OR REPLACE INTAKE SYSTEM

OK

4.

READ VALUE USING TECHSTREAM (MAP)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine and ECT / Data List / MAP.

(e) Read the MAP value.

Standard:

Engine Condition

Techstream Display

Ignition switch ON

85 to 110 kPa (638 to 825 mmHg)

HINT:

Standard atmospheric pressure is 101 kPa. For every 100 m increase in altitude, pressure drops by 1 kPa. Varies by weather (high atmospheric pressure, low atmospheric pressure).

Also, check "Atmosphere Pressure" in the Data List.

OK

GO TO STEP 6

NG

5.

REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR

(a) Replace the manifold absolute pressure sensor (See page ).

NEXT

6.

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.

(c) Turn the Techstream on.

(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

OK

GO TO STEP 8

NG

7.

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 Repairs" after replacing the EGR valve assembly (See page ).

NG

REPLACE EGR VALVE ASSEMBLY

OK

8.

CHECK WHETHER DTC OUTPUT RECURS (DTC P006A)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON and turn the Techstream on.

(c) Clear the DTC (See page ).

(d) Start the engine and warm it up (until the engine coolant temperature is 75°C (167°F) or higher) with all the accessories switched off.

HINT:

The A/C switch and all accessory switches should be off, and the shift lever should be in N or P.

(e) Idle the engine for 30 seconds or more.

(f) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

(g) Read the DTCs.

Result

Proceed to

P006A is output

A

No DTC output

B

B

END

A

9.

INSPECT MASS AIR FLOW METER

(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:

The A/C switch and all accessory switches should be off, and the shift lever should be in N or P.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine and ECT / Data List / MAF.

(e) Check MAF in the Data List during idling.

Standard:

3.4 to 6.2 gm/sec

HINT:

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

OK

REPLACE ECM

NG

REPLACE MASS AIR FLOW METER

    MIL Circuit

    Camshaft Position "A" Actuator Circuit (Bank 1) (P0010,P0020)

    See More:

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