Lexus ES manuals

Lexus ES: Camshaft Position Sensor "A" Bank 1 or Single Sensor No Signal (P034031,P034531)

Lexus ES (XZ10) Service Manual / Engine & Hybrid System / 2gr-fks (engine Control) / Sfi System / Camshaft Position Sensor "A" Bank 1 or Single Sensor No Signal (P034031,P034531)

DESCRIPTION

Refer to DTC P034011.

Click here

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P034031

Camshaft Position Sensor "A" Bank 1 or Single Sensor No Signal

A missing VVT sensor (for intake camshaft of bank 1) signal despite the crankshaft position sensor inputs being normal at an engine speed of 600 rpm or higher (1 trip detection logic).
  • Open or short in VVT sensor (for intake camshaft of bank 1) circuit
  • VVT sensor (for intake camshaft of bank 1)
  • Intake camshaft
  • Valve timing
  • ECM

Comes on

DTC stored

SAE Code: P0340

P034531

Camshaft Position Sensor "A" Bank 2 No Signal

A missing VVT sensor (for intake camshaft of bank 2) signal despite the crankshaft position sensor inputs being normal at an engine speed of 600 rpm or higher (1 trip detection logic).
  • Open or short in VVT sensor (for intake camshaft of bank 2) circuit
  • VVT sensor (for intake camshaft of bank 2)
  • Intake camshaft
  • Valve timing
  • ECM

Comes on

DTC stored

SAE Code: P0345

Reference: Inspection using an oscilloscope.

Click here

MONITOR DESCRIPTION

If no pulse signal is transmitted by the VVT sensor (for intake camshaft) despite the camshaft rotating the ECM interprets this as a malfunction of the sensor.

MONITOR STRATEGY

Related DTCs

P0340: VVT sensor (bank 1) verify pulse input

P0345: VVT sensor (bank 2) verify pulse input

Required Sensors/Components (Main)

VVT sensor (for intake camshaft)

Required Sensors/Components (Related)

Crankshaft position sensor

Frequency of Operation

Continuous

Duration

5 seconds

MIL Operation

Immediate

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

P0340: VVT Sensor (Bank 1) Verify Pulse Input

All of the following conditions are met

-

Engine speed

600 rpm or higher

Battery voltage

8 V or higher

Engine switch

On (IG)

VVT sensor voltage

0.3 to 4.7 V

VVT sensor range check fail (P0342, P0343)

Not detected
P0345: VVT Sensor (Bank 2) Verify Pulse Input

All of the following conditions are met

-

Engine speed

600 rpm or higher

Battery voltage

8 V or higher

Engine switch

On (IG)

VVT sensor voltage

0.3 to 4.7 V

VVT sensor range check fail (P0347, P0348)

Not detected

TYPICAL MALFUNCTION THRESHOLDS

VVT sensor signal

No signal

CONFIRMATION DRIVING PATTERN

HINT:

  • After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

    Click here

  • When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

    Click here

  1. Connect the Techstream to the DLC3.
  2. Turn the engine switch on (IG).
  3. Turn the Techstream on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the engine switch off and wait for at least 30 seconds.
  6. Start the engine [A].
  7. Idle the engine for 10 seconds or more [B].
  8. Turn the Techstream on.
  9. Enter the following menus: Powertrain / Engine / Trouble Codes [C].
  10. 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.
  11. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  12. Input the DTC: P034031 or P034531.
  13. Check the DTC judgment result.

    Techstream 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

    HINT:

    • If the judgment result is NORMAL, the system is normal.
    • If the judgment result is ABNORMAL, the system is malfunctioning.
    • If the judgment result is INCOMPLETE, perform steps [B] through [C] again.
    • [A] to [C]: Normal judgment procedure.

      The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

    • When clearing the permanent DTCs, do not disconnect the cable from the battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.

WIRING DIAGRAM

Refer to DTC P034011.

Click here

CAUTION / NOTICE / HINT

HINT:

  • If no problem is found through this diagnostic troubleshooting procedure, there may be a mechanical problem with the engine.
  • Read Freeze Frame Data using the Techstream. The ECM records vehicle and driving condition information as Freeze Frame Data the moment a DTC is stored. 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 HARNESS AND CONNECTOR

*a

Front view of wire harness connector

(to VVT Sensor (for Intake Camshaft))

*b

Bank 1

*c

Bank 2

HINT:

Make sure that the connector is properly connected. If it is not, securely connect it and check for DTCs again.

(a) Disconnect the VVT sensor (for intake camshaft) connector.

(b) Turn the engine switch on (IG).

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

C8-3 (VC) - Body ground

Engine switch on (IG)

4.5 to 5.5 V

C9-3 (VC) - Body ground

Engine switch on (IG)

4.5 to 5.5 V

C8-1 (VVR+) - Body ground

Engine switch on (IG)

3.0 to 5.0 V

C9-1 (VVL+) - Body ground

Engine switch on (IG)

3.0 to 5.0 V

(d) Turn the engine switch off and wait for at least 30 seconds.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

C8-3 (VC) - C8-1 (VVR+)

Engine switch off

1.425 to 1.575 kΩ

C9-3 (VC) - C9-1 (VVL+)

Engine switch off

1.425 to 1.575 kΩ

C8-2 (VVR-) - Body ground

Always

Below 1 Ω

C9-2 (VVL-) - Body ground

Always

Below 1 Ω
NG

GO TO STEP 4

OK

2.

CHECK SENSOR INSTALLATION AND CONDUCT VISUAL INSPECTION (VVT SENSOR (FOR INTAKE CAMSHAFT))

*a

Clearance

(a) Visually check the VVT sensor (for intake camshaft) for damage.

(b) Check the VVT sensor (for intake camshaft) installation condition.

OK:

The VVT sensor (for intake camshaft) does not have any damage and is installed properly.

NG

SECURELY REINSTALL VVT SENSOR (FOR INTAKE CAMSHAFT)

OK

3.

INSPECT INTAKE CAMSHAFT (TIMING ROTOR)

(a) Check the timing rotor of the intake camshaft.

OK:

Camshaft timing rotor does not have any cracks or deformation.

HINT:

Perform "Inspection After Repair" after replacing the intake camshaft.

Click here

OK

REPLACE VVT SENSOR (FOR INTAKE CAMSHAFT)

NG

REPLACE INTAKE CAMSHAFT

4.

CHECK HARNESS AND CONNECTOR (VVT SENSOR (FOR INTAKE CAMSHAFT) - ECM)

(a) Disconnect the VVT sensor (for intake camshaft) 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

C8-1 (VVR+) - C32-132 (VV1+)

Always

Below 1 Ω

C8-2 (VVR-) - C32-100 (VV1-)

Always

Below 1 Ω

C8-3 (VC) - C32-99 (VCV1)

Always

Below 1 Ω

C9-1 (VVL+) - C32-129 (VV2+)

Always

Below 1 Ω

C9-2 (VVL-) - C32-97 (VV2-)

Always

Below 1 Ω

C9-3 (VC) - C32-98 (VCV2)

Always

Below 1 Ω

C8-1 (VVR+) or C32-132 (VV1+) - Body ground and other terminals

Always

10 kΩ or higher

C8-2 (VVR-) or C32-100 (VV1-) - Body ground and other terminals

Always

10 kΩ or higher

C8-3 (VC) or C32-99 (VCV1) - Body ground and other terminals

Always

10 kΩ or higher

C9-1 (VVL+) or C32-129 (VV2+) - Body ground and other terminals

Always

10 kΩ or higher

C9-2 (VVL-) or C32-97 (VV2-) - Body ground and other terminals

Always

10 kΩ or higher

C9-3 (VC) or C32-98 (VCV2) - Body ground and other terminals

Always

10 kΩ or higher
OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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