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Home >> Infiniti >> 2015 >> QX60 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 116 (Engine Control System (DTC/Circuit Diagnosis) (VQ35DE) (Except Hybrid) (3 Of 3)) >> DTC/Circuit Diagnosis >> DTC P1564: ASCD Steering Switch >> Diagnosis Procedure >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

  1. CHECK ASCD STEERING SWITCH CIRCUIT

    G-20With CONSULT 

    1. Turn ignition switch ON.
    2. Select "MAIN SW", "CANCEL SW", "RESUME/ACC SW" and "SET SW" in "DATA MONITOR" mode with CONSULT.
    3. Check each item indication under the following conditions.
      Monitor item Condition Indication
      MAIN SW ON/OFF (MAIN) switch Pressed ON
      Released OFF
      CANCEL SW CANCEL switch Pressed ON
      Released OFF
      RESUME/ACC SW ACCEL/RES switch Pressed ON
      Released OFF
      SET SW COAST/SET switch Pressed ON
      Released OFF

    G-21Without CONSULT 

    1. Turn ignition switch ON.
    2. Check the voltage between ECM harness connector terminals under the following conditions.
      ECM Condition Voltage (V)
      Connector + -
      Terminal Terminal
      E32 134 135 ON/OFF (MAIN) switch: Pressed Approx. 0
      CANCEL switch: Pressed Approx. 1
      COAST/SET switch: Pressed Approx. 2
      ACCEL/RES switch: Pressed Approx. 3
      All ASCD steering switches: Released Approx. 4

    Is the inspection result normal?

    YES 

    Check intermittent incident. Refer to INTERMITTENT INCIDENT .

    NO 

    GO TO STEP 2  .

  2. CHECK ASCD STEERING SWITCH GROUND CIRCUIT

    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Disconnect combination switch harness connector M149.
    4. Check the continuity between combination switch and ECM harness connector.
      Combination switch ECM Continuity
      Terminal Connector Terminal
      16 E32 135 Existed
    5. Also check harness for short to ground and short to power.

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    Repair or replace error-detected parts.

  3. CHECK ASCD STEERING SWITCH INPUT SIGNAL CIRCUIT

    1. Check the continuity between combination switch and ECM harness connector.
      Combination switch ECM Continuity
      Terminal Connector Terminal
      13 E32 134 Existed
    2. Also check harness for short to ground and short to power.

    Is the inspection result normal?

    YES 

    GO TO STEP 4  .

    NO 

    Repair or replace error-detected parts.

  4. CHECK ASCD STEERING SWITCH

    Check ASCD steering switch. Refer to COMPONENT INSPECTION .

    Is the inspection result normal?

    YES 

    Check intermittent incident. Refer to INTERMITTENT INCIDENT .

    NO 

    Replace ASCD steering switch. Refer to COMPONENT PARTS LOCATION .

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