Toyota Avalon (XX50): Camshaft Position Sensor "A" Bank 1 or Single Sensor No Signal (P034031,P034531). Ignition Coil "A" Circuit Open (P035113-P035613). Camshaft Position Sensor "B" Bank 1 Circuit Short to Ground (P036511

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

DESCRIPTION

Refer to DTC P034011.

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Reference: Inspection using an oscilloscope.

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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

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

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.

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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

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:

(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:

NG

GO TO STEP 4

OK

(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

(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

(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:

OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

Ignition Coil "A" Circuit Open (P035113-P035613)

DESCRIPTION

HINT:

• These DTCs indicate malfunctions relating to the primary circuit.
• If DTC P035113 is output, check the No. 1 ignition coil assembly circuit.
• If DTC P035213 is output, check the No. 2 ignition coil assembly circuit.
• If DTC P035313 is output, check the No. 3 ignition coil assembly circuit.
• If DTC P035413 is output, check the No. 4 ignition coil assembly circuit.
• If DTC P035513 is output, check the No. 5 ignition coil assembly circuit.
• If DTC P035613 is output, check the No. 6 ignition coil assembly circuit.

A Direct Ignition System (DIS) is used on this vehicle.

The DIS is a 1-cylinder ignition system in which each cylinder is ignited by one ignition coil assembly and one spark plug is connected to the end of each secondary wiring. A powerful voltage, generated in the secondary wiring, is applied directly to each spark plug. The spark of the spark plugs passes from the center electrode to the ground electrodes.

The ECM determines the ignition timing and transmits the ignition (IGT) signals to each cylinder. Using the IGT signal, the ECM turns the power transistor inside the igniter on and off. The power transistor, in turn, switches the current supplied to the primary coil on and off. When the current to the primary coil is cut off, a powerful voltage is generated in the secondary coil. This voltage is applied to the spark plugs, causing them to spark inside the cylinders. As the ECM cuts the current to the primary coil, the igniter sends back an ignition confirmation (IGF) signal to the ECM for each cylinder ignition.

• Reference: Inspection using an oscilloscope.

  HINT:

  • The correct waveform is as shown.
  • While idling the engine, check the waveform between terminals IGT (1 to 6) and E1, and IGF (1 or 2) and E1 of the ECM connector.

  ECM Terminal Name	CH1: Between IGT (1 to 6) and E1 CH2: Between IGF (1 or 2) and E1
  Tester Range	2 V/DIV., 20 ms./DIV.
  Condition	Idling with warm engine

MONITOR DESCRIPTION

If the ECM does not receive any IGF signals despite transmitting the IGT signal, it interprets this as a fault in the igniter and stores a DTC.

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

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. Turn the Techstream on.
8. Idle the engine for 10 seconds or more [B].
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: P035113, P035213, P035313, P035413, P035513 or P035613.
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

CAUTION / NOTICE / HINT

NOTICE:

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

HINT:

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

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Clear the DTC.

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

NEXT

(a) Shuffle the arrangement of the ignition coil assemblies (among No. 1 to No. 6 cylinders).

NOTICE:

Do not change the location of the connectors.

(b) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

(c) Enter the following menus: Powertrain / Engine / Trouble Codes.

(d) Read the DTCs.

HINT:

Perform "Inspection After Repair" after replacing the ignition coil assembly.

Click here

B

REPLACE IGNITION COIL ASSEMBLY

A

(a) Disconnect the ignition coil assembly connector.

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

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

Standard Voltage:

NG

GO TO STEP 6

OK

(a) Disconnect the ignition coil assembly connector.

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

Standard Resistance:

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

(a) Disconnect the ignition coil assembly connector.

(b) Disconnect the ECM connector.

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

Standard Resistance:

OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

(a) Remove the IG2 NO. 1 relay from the No. 1 engine room relay block and No. 1 junction block assembly.

(b) Disconnect the ignition coil assembly connector.

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

Standard Resistance:

OK

GO TO ECM POWER SOURCE CIRCUIT

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (IG2 NO. 1 RELAY - IGNITION COIL ASSEMBLY)

Camshaft Position Sensor "B" Bank 1 Circuit Short to Ground (P036511,P036515,P039011,P039015)

DESCRIPTION

The VVT sensor (for exhaust camshaft) (EV1, EV2 signal) consists of a magnet and MRE (Magneto Resistance Element).

The exhaust camshaft has a timing rotor for the VVT sensor. When the exhaust camshaft rotates, changes occur in the air gaps between the timing rotor and MRE, which affects the magnetic field. As a result, the resistance of the MRE material fluctuates. The VVT sensor converts the camshaft rotation data to pulse signals, uses the pulse signals to determine the camshaft angle, and sends it to the ECM. Then the ECM uses this data to control fuel injection duration, injection timing and the Variable Valve Timing (VVT) system.

Reference: Inspection using an oscilloscope.

Click here

MONITOR DESCRIPTION

If the output voltage transmitted by the VVT sensor (for exhaust camshaft) remains low or high, the ECM interprets this as a malfunction in the sensor circuit, illuminates the MIL and stores a DTC.

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

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. Turn the engine switch on (IG) [A].
7. Turn the Techstream on.
8. Wait for 5 seconds or more [B].
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: P036511, P036515, P039011 or P039015.
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.
    • [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

CAUTION / NOTICE / HINT

HINT:

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

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

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

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 exhaust camshaft) connector.

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

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

Standard Voltage:

(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:

OK

REPLACE VVT SENSOR (FOR EXHAUST CAMSHAFT)

NG

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

(b) Disconnect the ECM connector.

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

Standard Resistance:

OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR