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Home >> Infiniti >> 2013 >> FX37 Base, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 12 (Engine Control System - DTCS P1212 Through P2138) >> DTC P1564: ICC Steering Switch >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2013 Infiniti FX50. However, it is still accessible from the selected car via links, so may be relevant.
  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 
    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
      M160 102 (ICC steering switch signal) 111 MAIN switch: Pressed Approx. 0
      LDP 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
      Connector Terminal Connector Terminal
      - 16 M160 111 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
      Connector Terminal Connector Terminal
      - 13 M160 102 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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