Toyota Tundra Service Manual: Camshaft Position Sensor Circuit (P0340,P0342,P0343,P0345,P0347,P0348)

Toyota Tundra Service Manual / Engine, Hybrid System / 1ur-fe Engine Control / Sfi System / Camshaft Position Sensor Circuit (P0340,P0342,P0343,P0345,P0347,P0348)

DESCRIPTION

The intake camshaft's Variable Valve Timing (VVT) sensor (VV1 and VV2 signal) consists of a magnet and MRE (Magnetoresistive Element).

The intake camshaft has a sensor plate with 3 teeth on its outer circumference. When the intake camshaft rotates, changes occur in the air gaps between the 3 teeth and MRE, which affects the magnet. As a result, the resistance of the MRE fluctuates. The VVT sensor converts the gear rotation data into pulse signals, uses the pulse signals to determine the camshaft angle, and sends it to the ECM.

DTC No.

DTC Detection Condition

Trouble Area

P0340

P0345

No VVT sensor signal to ECM at engine speed of 600 rpm or more

(1 trip detection logic)

  • Open or short in VVT sensor (for intake side of bank 1, 2) circuit
  • VVT sensor (for intake side of bank 1, 2)
  • Intake camshaft
  • Timing chain for intake camshaft jumped tooth
  • ECM

P0342

P0347

Output voltage of VVT sensor less than 0.3 V for 4 seconds

(1 trip detection logic)

  • Open or short in VVT sensor (for intake side of bank 1, 2) circuit
  • VVT sensor (for intake side of bank 1, 2)
  • Intake camshaft
  • Timing chain for intake camshaft jumped tooth
  • ECM

P0343

P0348

Output voltage of VVT sensor more than 4.7 V for 4 seconds

(1 trip detection logic)

  • Open or short in VVT sensor (for intake side of bank 1, 2) circuit
  • VVT sensor (for intake side of bank 1, 2)
  • Intake camshaft
  • Timing chain for intake camshaft jumped tooth
  • 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

    D74-92 (VV1+) - D74-91 (VV1-)

    5 V/DIV.

    20 msec./DIV.

    Cranking or idling

    The correct waveform is as shown

    D74-87 (VV2+) - D74-88 (VV2-)

    5 V/DIV.

    20 msec./DIV.

    Cranking or idling

    The correct waveform is as shown

    HINT:

    VV1 and VV2 are the VVT sensor signals, and NE is the CKP sensor signal.

MONITOR DESCRIPTION

If no signal is transmitted by the VVT sensor despite the camshaft revolving, or the rotations of the camshaft and the crankshaft are not synchronized, 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

P0340: VVT position sensor (for Bank 1) verify pulse input

P0342: VVT position sensor (for Bank 1) range check (low voltage)

P0343: VVT position sensor (for Bank 1) range check (high voltage)

P0345: VVT position sensor verify pulse input (for Bank 2)

P0347: VVT position sensor (for Bank 2) range check (low voltage)

P0348: VVT position sensor (for Bank 2) range check (high voltage)

Required Sensors/Components (Main)

VVT position sensor (for Bank 1 and 2)

Required Sensors/Components (Related)

Crankshaft position sensor

Frequency of Operation

Continuous

Duration

P0340, P0345: 5 seconds

P0342, P0343, P0347, P0348: 4 seconds

MIL Operation

Immediate

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

P0340, P0345 (Verify pulse input):

Engine speed

600 rpm or more

Battery voltage

8 V or higher

Starter

OFF

Ignition switch

ON

Camshaft position sensor voltage

0.3 to 4.7 V

VVT sensor range check low voltage fail (P0342, P0347)

Not detected

VVT sensor range check high voltage fail (P0343, P0348)

Not detected

P0342, P0343, P0347, P0348 (Low voltage, High voltage):

Starter

OFF

Ignition switch

ON

Ignition switch ON and time after ignition switch is off to ON

2 seconds or more

VVT sensor verify pulse input fail (P0340, P0345)

Not detected

Battery voltage

8 V or Higher

TYPICAL MALFUNCTION THRESHOLDS

P0340, P0345 (Verify pulse input):

VVT sensor signal

No signal

P0342, P0347 (Low voltage):

VVT sensor voltage

Below 0.3 V

P0343, P0348 (High voltage):

VVT sensor voltage

Higher than 4.7 V

COMPONENT OPERATING RANGE

VVT 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 10 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: P0340, P0342, P0343, P0345, P0347 or P0348.
  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:

  • 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.
  • Bank 1 refers to the bank that includes the No. 1 cylinder*.

    *: The No. 1 cylinder is the cylinder which is farthest from the transmission.

  • Bank 2 refers to the bank that does not include the No. 1 cylinder.

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE)

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

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

3 (VC) - Body ground

Ignition switch ON

4.5 to 5.0 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.

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

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

D37-1 (VVL+) - D74-92 (VV1+)

Always

Below 1 Ω

D37-2 (VVL-) - D74-91 (VV1-)

Always

Below 1 Ω

D39-1 (VVR+) - D74-87 (VV2+)

Always

Below 1 Ω

D39-2 (VVR-) - D74-88 (VV2-)

Always

Below 1 Ω

D37-1 (VVL+) or D74-92 (VV1+) - Body ground

Always

10 kΩ or higher

D37-2 (VVL-) or D74-91 (VV1-) - Body ground

Always

10 kΩ or higher

D39-1 (VVR+) or D74-87 (VV2+) - Body ground

Always

10 kΩ or higher

D39-2 (VVR-) or D74-88 (VV2-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

CHECK SENSOR INSTALLATION (VVT SENSOR FOR INTAKE SIDE)

(a) Check the VVT sensor (for intake side) installation.

OK:

Sensor is installed correctly.

NG

SECURELY REINSTALL SENSOR

OK

4.

INSPECT INTAKE CAMSHAFT (TEETH)

(a) Check the teeth of the camshaft.

OK:

Teeth do not have any cracks or deformation.

HINT:

Perform "Inspection After Repair" after replacing the intake camshaft (See page ).

NG

REPLACE INTAKE CAMSHAFT

OK

5.

CHECK VALVE TIMING (CHECK FOR LOOSE OR JUMPED TEETH ON TIMING CHAIN)

NG

ADJUST VALVE TIMING

OK

6.

REPLACE VVT SENSOR (FOR INTAKE SIDE)

(a) Replace the VVT (for intake side) sensor (See page ).

NEXT

7.

CHECK WHETHER DTC OUTPUT RECURS

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Clear DTCs.

(e) Refer to the confirmation driving pattern.

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

(g) Read DTCs.

Result

Result

Proceed to

No DTC is output

A

P0340, P0342, P0343, P0345, P0347 or P0348 is output

B

HINT:

If the engine does not start, replace the ECM.

A

END

B

REPLACE ECM

    Crankshaft Position Sensor "A" Circuit (P0335,P0337-P0339)

    Ignition Coil "A" Primary / Secondary Circuit (P0351-P0358)

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