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Home >> Infiniti >> 2012 >> M37 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P1225 Through P2A03 >> DTC P1564: ICC Steering Switch >> Diagnosis Procedure
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Diagnosis Procedure

  1. CHECK GROUND CONNECTION 
    1. Turn ignition switch OFF.
    2. Check ground connection M95. Refer to Ground Inspection in "CIRCUIT INSPECTION ".

      Is the inspection result normal? 

      YES: GO TO 2.

      NO: Repair or replace ground connection.

  2. CHECK ICC STEERING SWITCH CIRCUIT 

    With CONSULT 

    1. Turn ignition switch ON.
    2. Select "MAIN SW", "DYNAMIC DRIVE ASSISTANCE SYSTEMS SW", "CANCEL SW", "RESUME/ACC SW", "SET SW" and "DIST SW" in "DATA MONITOR" mode with CONSULT.
    3. Check each item indication under the following conditions.
      Monitor item Condition Indication
      MAIN SW MAIN switch Pressed ON
      Released OFF
      DYNAMIC DRIVE ASSISTANCE SYSTEMS SW DYNAMIC DRIVE ASSISTANCE SYSTEMS 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
      DIST SW DISTANCE switch Pressed ON
      Released OFF

    Without CONSULT 

    1. Turn ignition switch ON.
    2. Check the voltage between ECM harness connector terminals as per the following.
      ECM Condition Voltage (V)
      Connector + -
      Terminal Terminal
      M107 101 (ICC steering switch signal) 108 MAIN switch: Pressed Approx. 0
      DYNAMIC DRIVE ASSISTANCE SYSTEMS switch: Pressed Approx. 1.0
      CANCEL switch: Pressed Approx. 1.9
      DISTANCE switch: Pressed Approx. 2.6
      SET/COAST switch: Pressed Approx. 3.2
      RESUME/ACCELERATE switch: Pressed Approx. 3.7
      All ICC steering switches: Released Approx. 4.2

      Is the inspection result normal? 

      YES: GO TO  8.

      NO: 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.
    4. Check the continuity between combination switch and ECM harness connector.
      Combination switch ECM Continuity
      Terminal Connector Terminal
      16 M107 108 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.

    • Combination switch (spiral cable)
    • Harness for open and short between ECM and combination switch

      : Repair open circuit, 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 the continuity between combination switch and ECM harness connector.
      Combination switch ECM Continuity
      Terminal Connector Terminal
      13 M107 101 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.

    • Combination switch (spiral cable)
    • Harness for open and short between ECM and combination switch

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

  7. CHECK ICC STEERING SWITCH 

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 8.

    NO: Replace ICC steering switch. Refer to "EXPLODED VIEW ".

  8. CHECK INTERMITTENT INCIDENT 

    Refer to "INTERMITTENT INCIDENT ".

    : INSPECTION END

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