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Home › Infiniti › 2010 › M45 Base › Repair and Diagnosis › Engine Performance › System › Engine Control System - DTCS P1550 To P2A03 › DTC P1564 ICC Steering Switch › Diagnosis Procedure

Diagnosis Procedure

  1. CHECK GROUND CONNECTIONS
    1. Turn ignition switch OFF.
    2. Loosen and retighten ground screws on the body.

    Refer to "GROUND INSPECTION ".

    Fig 1: Identifying Body Ground (M70 And M16)
    G06303368Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK: GO TO 2.

    NG: Repair or replace ground connections.

  2. CHECK ICC STEERING SWITCH CIRCUIT
    1. Turn ignition switch ON.
    2. Check voltage between ECM terminal 99 and ground with pressing each button.
    VOLTAGE REFERENCE CHART

    Switch Condition Voltage (V)
    MAIN switch Pressed Approx. 0
    Released Approx. 4.3
    CANCEL switch Pressed Approx. 1.9
    Released Approx. 4.3
    RESUME/ACCELERATE switch Pressed Approx. 3.8
    Released Approx. 4.3
    SET/COAST switch Pressed Approx. 3.3
    Released Approx. 4.3
    DISTANCE switch Pressed Approx. 2.6
    Released Approx. 4.3
    LDP ON switch Pressed Approx. 1.1
    Released Approx. 4.3
    Fig 2: Checking Voltage Between ECM Terminal 99 And Ground
    G04900663Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK: GO TO  8.

    NG: GO TO 3.

  3. CHECK ICC STEERING SWITCH GROUND CIRCUIT FOR OPEN AND SHORT
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Disconnect combination switch harness connector M303.
    4. Check harness continuity between combination switch terminal 18 and ECM terminal 67.

      Refer to SYSTEM WIRING DIAGRAMS article.

      Continuity should exist  .

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

    OK or NG 

    OK: GO TO  5.

    NG: GO TO 4.

  4. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors M72, F102
    • 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 ICC STEERING SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
    1. Check harness continuity between ECM terminal 99 and combination switch terminal 21.

      Refer to SYSTEM WIRING DIAGRAMS article.

      Continuity should exist  .

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

    OK or NG 

    OK: GO TO  7.

    NG: GO TO 6.

  6. DETECT MALFUNCTIONING PART

    Check the following.

    • 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 ICC STEERING SWITCH

    Refer to "COMPONENT INSPECTION ".

    OK or NG 

    OK: GO TO 8.

    NG: Replace ICC steering switch.

  8. CHECK INTERMITTENT INCIDENT

    Refer to "DIAGNOSIS PROCEDURE ".

    INSPECTION END 

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