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Home >> Infiniti >> 2021 >> Q60 Pure, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (7 Of 7) >> Engine (ECM) >> DTC P26A7: Multi-Way Control Valve Position Sensor >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

  1. CHECK MULTI-WAY CONTROL VALVE POSITION SENSOR POWER SUPPLY 
    1. Turn ignition switch OFF.
    2. Disconnect multi-way control valve harness connector.
    3. Turn ignition switch ON.
    4. Check the voltage between multi-way control valve harness connector and ground.

      +

      -

      Voltage

      (Approx.)

      Multi-way control valve

      Connector

      Terminal

      F117

      5

      Ground

      5 V

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

    GO TO 2.

  2. CHECK MULTI-WAY CONTROL VALVE POSITION SENSOR POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between multi-way control valve harness connector and ECM harness connector.

      Multi-way control valve

      ECM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F117

      5

      F142

      136

      Existed

    4. Also check harness for short to power and short to ground.

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    Repair or replace error-detected parts.

  3. CHECK SENSOR POWER SUPPLY 2 CIRCUIT 

    Refer to Diagnosis Procedure .

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

    Repair or replace error-detected parts.

  4. CHECK MULTI-WAY CONTROL VALVE POSITION SENSOR GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between multi-way control valve harness connector and ECM harness connector.

      Multi-way control valve

      ECM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F117

      3

      F142

      125

      Existed

    4. Also check harness for short to power.

    Is the inspection result normal?

    YES

    GO TO 5.

    NO

    Repair or replace error-detected parts.

  5. CHECK MULTI-WAY CONTROL VALVE POSITION SENSOR INPUT SIGNAL CIRCUIT 
    1. Check the continuity between multi-way control valve harness connector and ECM harness connector.

      Multi-way control valve

      ECM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F117

      4

      F142

      110

      Existed

    2. Also check harness for short to power and short to ground.

    Is the inspection result normal?

    YES

    GO TO 6.

    NO

    Repair or replace error-detected parts.

  6. CHECK MULTI-WAY CONTROL VALVE POSITION SENSOR 

    Check the multi-way control valve position sensor. Refer to Component Inspection .

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Replace multi-way control valve. Refer to MULTI-WAY CONTROL VALVE : Removal & Installation .