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Home >> Nissan-Datsun >> 2005 >> Murano SL, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> DTC P1564: ASCD Steering Switch >> Diagnostic Procedure
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Diagnostic Procedure

  1. CHECK GROUND CONNECTIONS 
    1. Turn ignition switch OFF.
    2. Loosen and retighten two ground screws on the body. Refer to GROUND INSPECTION .
    Fig 1: Checking Ground Connections
    G02466724Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    • OK: GO TO  2.
    • NG: Repair or replace ground connections.
  2. CHECK ASCD STEERING SWITCH CIRCUIT 

    WITH CONSULT-II 

    1. Turn ignition switch ON.
    2. Select "MAIN SW", "CANCEL SW", "RESUME/ACC SW" and "SET SW" in "DATA MONITOR" mode with CONSULT-II.
    3. Check each item indication under the following conditions.
    Fig 2: Monitor Item & Switch Condition
    G02466725Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 3: CONSULT-II Data Monitor Screen
    G02466726Courtesy of NISSAN MOTOR CO., U.S.A.

    Without CONSULT-II 

    1. Turn ignition switch ON.
    2. Check voltage between ECM terminal 99 and ground with pressing each button.
    Fig 4: Switch Voltage Reference Chart
    G02466727Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 5: Checking Voltage Between ECM Terminal & Ground With Pressing Each Button
    G02466728Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    • OK: GO TO  8.
    • NG: 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 M203.
    4. Check harness continuity between combination switch terminal 14 and ECM terminal 67. Refer to WIRING DIAGRAM - ASC/SW .
      • 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.
    Fig 6: Checking ASCD Steering Switch Ground Circuit For Open & Short
    G02466729Courtesy of NISSAN MOTOR CO., U.S.A.
  4. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors M82, F102
    • Combination switch (spiral cable)
    • Harness for open and short between ECM and combination switch
    • Repair open circuit or short to power in harness or connectors.
  5. CHECK ASCD STEERING SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
    1. Check harness continuity between ECM terminal 99 and combination switch terminal 15. Refer to WIRING DIAGRAM - ASC/SW .
      • 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 ASCD STEERING SWITCH 

    Refer to COMPONENT INSPECTION .

    OK or NG 

    • OK: GO TO  8.
    • NG: Replace steering wheel.
  8. CHECK INTERMITTENT INCIDENT 

    Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

    • INSPECTION END 
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