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Home › Nissan-Datsun › 2004 › Pathfinder SE, RWD › Repair and Diagnosis › Engine Performance › System › Engine Control System › DTC P1564: ASCD Steering Switch › Diagnostic Procedure

Diagnostic Procedure

  1. CHECK ASCD STEERING SWITCH CIRCUIT 

    With CONSULT-II 

    1. Turn ignition switch "ON".
    2. Select "MAIN SW", "RESUME/ACC SW", "SET SW" and "CANCEL SW" in "DATA MONITOR" mode with CONSULT-II.
      Fig 1: Checking ASCD Steering Switch Circuit With CONSULT-II
      G00781186Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Check each item indication under the following conditions.
      Fig 2: Item Indication Chart
      G00781187Courtesy 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 3: Checking ASCD Steering Switch Circuit Without CONSULT-II
      G00781188Courtesy of NISSAN MOTOR CO., U.S.A.
      Fig 4: Switch Condition And Voltage Chart
      G00781189Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK GO TO  4 .
    2. NG GO TO 2.
  2. CHECK ASCD STEERING SWITCH GROUND CIRCUIT FOR OPEN AND SHORT 
    1. Turn ignition switch "OFF".
    2. Disconnect ASCD steering switch harness connector.
    3. Check harness continuity between ASCD steering switch terminal 2 and ground. Refer to WIRING DIAGRAM  .
      Fig 5: Checking ASCD Steering Switch Ground Circuit For Open And Short
      G00781190Courtesy of NISSAN MOTOR CO., U.S.A.

      Continuity should exist. 

    4. Also check harness for short to power.

    OK or NG 

    1. OK GO TO  4 .
    2. NG GO TO 3.
  3. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connector Z20
    • Spiral cable Z2
    • Harness connectors Z1, M47
    • Harness connectors M94, F27
    • Harness connectors F22, M33
    • Joint connector F204
    • Harness for open and short between ECM and ASCD steering switch
    • Harness for open and short between TCM and ASCD steering switch
    1. Repair open circuit or short to power in harness or connectors.
  4. CHECK ASCD STEERING SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
    1. Disconnect ECM harness connector.
    2. Check harness continuity between ECM terminal 99 and ASCD steering switch terminal 1.

      Refer to WIRING DIAGRAM  .

      Continuity should exist. 

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

    OK or NG 

    1. OK GO TO  6 .
    2. NG GO TO 5.
  5. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connector Z20
    • Spiral cable Z2
    • Harness connectors Z1, M47
    • Harness connectors M32, F23
    • Harness for open and short between ECM and ASCD steering switch
    1. Repair open circuit or short to ground or short to power in harness or connectors.
  6. CHECK ASCD STEERING SWITCH 

    Refer to "COMPONENT INSPECTION  " .

    OK or NG 

    1. OK GO TO 7.
    2. NG Replace ASCD steering switch.
  7. CHECK INTERMITTENT INCIDENT 

    Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT  " .

    1. INSPECTION END 
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