Toyota Tundra Service Manual: Crankshaft Position Sensor "A" Circuit (P0335,P0337-P0339)

Toyota Tundra Service Manual / Engine, Hybrid System / 1ur-fe Engine Control / Sfi System / Crankshaft Position Sensor "A" Circuit (P0335,P0337-P0339)

DESCRIPTION

The crankshaft position (CKP) sensor system consists of a crankshaft angle sensor plate and Magnetoresistive Element (MRE) type sensor. The crankshaft angle sensor plate has 34 teeth at 10° intervals (2 teeth are missing for detecting top dead center), and is installed to the rear end of the crankshaft. The crankshaft position sensor outputs 34 rotation signals per crankshaft revolution. The ECM uses the G2 signal to distinguish between the cylinders, and uses the NE signal to detect the crankshaft position and engine rpm.

DTC No.

DTC Detection Condition

Trouble Area

P0335

Either condition is met:

  • No crankshaft position (CKP) sensor signal to ECM while cranking (1 trip detection logic)
  • No crankshaft position (CKP) sensor signal to ECM at engine speed of 450 rpm or more (1 trip detection logic)
  • Open or short in crankshaft position (CKP) sensor circuit
  • Crankshaft position (CKP) sensor
  • Crankshaft position (CKP) sensor plate
  • ECM

P0337

Output voltage of CKP sensor 0.3 V or less for 4 seconds (1 trip detection logic)

  • Open or short in CKP sensor circuit
  • CKP sensor
  • CKP sensor plate
  • ECM

P0338

Output voltage of CKP sensor 4.7 V or more for 4 seconds (1 trip detection logic)

  • Open or short in CKP sensor circuit
  • CKP sensor
  • CKP sensor plate
  • ECM

P0339

Under conditions (a), (b) and (c), no CKP sensor signal to ECM for 0.05 seconds or more (1 trip detection logic):

(a) Engine speed 1000 rpm or more

(b) Starter signal OFF

(c) 3 seconds or more have elapsed since starter signal switched from ON to OFF

  • Open or short in CKP sensor circuit
  • CKP sensor
  • CKP sensor plate
  • ECM
  • Reference: Inspection using an oscilloscope.

    Standard:

    Tester Connection

    Tool Setting

    Condition

    Specified Condition

    D74-110 (NE+) - D74-111 (NE-)

    5 V/DIV., 20 msec./DIV.

    Cranking or idling

    The correct waveform is as shown

    D74-90 (G2) - D74-89 (G2-)

    5 V/DIV., 20 msec./DIV.

    Cranking or idling

    The correct waveform is as shown

    HINT:

    G2 is the camshaft position sensor signal, and NE is the crankshaft position sensor signal.

MONITOR DESCRIPTION

If there is no signal from the crankshaft position sensor despite the crankshaft revolving, the ECM interprets this as a malfunction of the sensor.

When the sensor output voltage remains at less than 0.3 V, or more than 4.7 V for more than 4 seconds, the ECM stores a DTC.

MONITOR STRATEGY

Related DTCs

P0335: Crankshaft position sensor range check/rationality

P0337: Crankshaft position sensor check (Low voltage)

P0338: Crankshaft position sensor check (High voltage)

Required sensors/Components (Main)

Crankshaft Position (CKP) sensor

Required sensors/Components (Related)

Camshaft position sensor

Frequency of operation

Continuous

Duration

P0335: 4.7 seconds

P0337, P0338: 4 seconds

MIL operation

Immediate

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

ALL

Monitor runs whenever following DTCs not present

None

P0335: Crankshaft Position Sensor Range Check

Case 1

Engine speed (Top dead center)

450 rpm or more

Engine speed (30°CA)

450 rpm or more

Starter

OFF

Time after starter turned from ON to OFF

3 seconds or more

CKP sensor voltage

0.3 to 4.7 V

Case 2

Starter

ON

Minimum battery voltage while starter ON

Below 11 V

CKP sensor voltage

0.3 to 4.7 V

P0337, P0338 Crankshaft Position Sensor Range Check (Low Voltage, High Voltage)

Battery voltage

8 V or higher

Ignition switch

ON

Starter

OFF

TYPICAL MALFUNCTION THRESHOLDS

P0335 Crankshaft Position Sensor Range Check

Engine speed signal

No signal

P0337 Crankshaft Position Sensor Range Check (Low Voltage)

CKP sensor voltage

Less than 0.3 V

P0338 Crankshaft Position Sensor Range Check (High Voltage)

CKP sensor voltage

More than 4.7 V

COMPONENT OPERATING RANGE

CKP sensor

  • CKP sensor output voltage fluctuates while engine crankshaft revolving
  • 34 CKP sensor signals per crankshaft revolution

CKP sensor voltage

0.3 to 4.7 V

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.
  7. Idle the engine for 20 seconds 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: P0335, P0337 or P0338.
  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.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

HINT:

  • If no problem is found by this diagnostic troubleshooting procedure, check for problems by referring to the engine mechanical section.
  • The engine speed can be checked by using the Techstream. To perform the check, follow the procedures below:
    1. Connect the Techstream to the DLC3.
    2. Start the engine.
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine and ECT / Data List / Engine Speed.
    • The engine speed may be indicated as zero despite the engine running normally. This is caused by a lack of NE signals from the crankshaft position (CKP) sensor. Alternatively, the engine speed may be indicated as lower than the actual engine speed if the CKP sensor output voltage is insufficient.
  • Read freeze frame data using the Techstream. Freeze frame data records the engine conditions 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.

READ VALUE USING TECHSTREAM (ENGINE SPEED)

(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 / Engine Speed.

(e) Start the engine.

(f) Read the values displayed on the Techstream while the engine is running.

Standard:

Correct values are displayed.

HINT:

  • To check the engine speed change, display the graph on the Techstream.
  • If the engine does not start, check the engine speed while cranking.
  • If the engine speed indicated on the Techstream remains zero (0), there may be an open or short in the Crankshaft Position (CKP) sensor circuit.
OK

CHECK FOR INTERMITTENT PROBLEMS

NG

2.

INSPECT CRANKSHAFT POSITION SENSOR (SENSOR POWER SOURCE)

(a) Disconnect the crankshaft position sensor connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

D3-3 (VC) - Body ground

Ignition switch ON

4.5 to 5.0 V

NG

GO TO STEP 8

OK

3.

CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)

(a) Disconnect the crankshaft position sensor connector.

(b) Disconnect the ECM connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

D3-1 (NE+) - D74-110 (NE+)

Always

Below 1 Ω

D3-2 (NE-) - D74-111 (NE-)

Always

Below 1 Ω

D3-1 (NE+) or D74-110 (NE+) - Body ground

Always

10 kΩ or higher

D3-2 (NE-) or D74-111 (NE-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR)

(a) Check the crankshaft position sensor installation.

OK:

Sensor is installed correctly.

NG

SECURELY REINSTALL SENSOR

OK

5.

INSPECT CRANKSHAFT POSITION SENSOR PLATE (TEETH OF SENSOR PLATE)

(a) Check the teeth of the sensor plate.

OK:

Sensor plate does not have any cracks or deformation.

NG

REPLACE CRANKSHAFT POSITION SENSOR PLATE

OK

6.

REPLACE CRANKSHAFT POSITION SENSOR

(a) Replace the crankshaft position sensor (See page ).

NEXT

7.

CHECK WHETHER DTC OUTPUT RECURS (DTC P0335, P0337, P0338 AND/OR P0339)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Clear DTCs (See page ).

(e) Refer to the confirmation driving pattern.

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

(g) Read DTCs.

Result

Result

Proceed to

No DTC is output

A

P0335, P0337, P0338 or P0339 is output

B

HINT:

If the engine does not start, replace the ECM.

A

END

B

REPLACE ECM

8.

CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)

(a) Disconnect the crankshaft position sensor connector.

(b) Disconnect the ECM connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

D3-3 (VC) - D74-66 (VCV2)

Always

Below 1 Ω

D3-3 (VC) or D74-66 (VCV2) - Body ground

Always

10 kΩ or higher

OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

    Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor) (P0327,P0328,P032C,P032D,P0332,P0333,P033C,P033D)

    Camshaft Position Sensor Circuit (P0340,P0342,P0343,P0345,P0347,P0348)

    See More:

    Toyota Tundra Service Manual > Radio Antenna: Installation
    INSTALLATION PROCEDURE 1. INSTALL FENDER ANTENNA ASSEMBLY (a) Install the fender antenna assembly with the bolt. Torque: 9.0 N·m {92 kgf·cm, 80 in·lbf} (b) Attach the 5 clamps and install the bolt. Torque: 9.0 N·m {92 kgf·cm, 80 in·lbf} (c) Connect each connector. 2. INSTALL FRONT FENDER LINER ...

    Toyota Tundra Owners Manual

    Toyota Tundra Service Manual

    © 2021 Copyright www.ttundra.com
    0.0194