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Home › Nissan-Datsun › 2010 › Cube Base › Repair and Diagnosis › Engine Performance › System › Engine Control System - DTCS P0643 To P2A00 › P1564 ASCD Steering Switch › Diagnosis Procedure

Diagnosis Procedure

  1. CHECK GROUND CONNECTION
    1. Turn ignition switch OFF.
    2. Check ground connection E38. Refer to Ground Inspection in "CIRCUIT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 2.

    NO: Repair or replace ground connection.

  2. CHECK ASCD STEERING SWITCH CIRCUIT

    With CONSULT-III 

    1. Turn ignition switch ON.
    2. Select "MAIN SW", "CANCEL SW", "RESUME/ACC SW" and "SET SW" in "DATA MONITOR" mode with CONSULT-III.
    3. Check each item indication under the following conditions.
    MONITOR ITEM CONDITION CHART

    Monitor item Condition Indication
    MAIN SW MAIN switch Pressed ON
    Released OFF
    CANCEL SW CANCEL switch Pressed ON
    Released OFF
    RESUME/ACC SW RESUME/ACCELERATE switch Pressed ON
    Released OFF
    SET SW SET/COAST switch Pressed ON
    Released OFF

    Without CONSULT-III 

    1. Turn ignition switch ON.
    2. Check the voltage between ECM harness connector terminals.
    TERMINAL VOLTAGE REFERENCE CHART

    ECM Condition Voltage
    Connector + -
    Terminal Terminal
    E16 94 (ASCD steering switch signal) 95 MAIN switch: Pressed Approx. 0 V
    CANCEL switch: Pressed Approx. 1 V
    SET/COAST switch: Pressed Approx. 2 V
    RESUME/ACCELERATE switch: Pressed Approx. 3 V
    All ASCD steering switches: Released Approx. 4 V

    Is the inspection result normal? 

    YES: GO TO  5.

    NO: GO TO 3.

  3. CHECK ASCD STEERING SWITCH GROUND CIRCUIT FOR OPEN AND SHORT
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Disconnect combination switch harness connector M352.
    4. Check the continuity between combination switch and ECM harness connector.
      TERMINAL CONTINUITY REFERENCE CHART

      Combination switch ECM Continuity
      Terminal Connector Terminal
      16 E16 95 Existed
    5. Also check harness for short to ground and short to power.

    Is the inspection result normal? 

    YES: GO TO  5.

    NO: GO TO 4.

  4. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors M77, E105
    • Combination switch (spiral cable)
    • Harness for open and short between ECM and combination switch

    Repair open circuit or short to ground or short to power in harness or connectors.

  5. CHECK ASCD STEERING SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
    1. Check the continuity between ECM harness connector and combination switch.
      TERMINAL CONTINUITY REFERENCE CHART

      Combination switch ECM Continuity
      Terminal Connector Terminal
      13 E16 94 Existed
    2. Also check harness for short to ground and short to power.

    Is the inspection result normal? 

    YES: GO TO  7.

    NO: GO TO 6.

  6. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors M77, E105
    • Combination switch (spiral cable)
    • Harness for open and short between ECM and combination switch

    Repair open circuit or short to ground or short to power in harness or connectors.

  7. CHECK ASCD STEERING SWITCH

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 8.

    NO: Replace ASCD steering switch.

  8. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    INSPECTION END

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