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Home › Nissan-Datsun › 2003 › Sentra SE-R, Automatic › Repair and Diagnosis › External Pages › Different car › Section 588 (Engine Control System - Coupe) › DTC P1564: ASCD Steering Switch › Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2005 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.
  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: Locating Body Ground Connections - DTC P1564 ASCD Steering Switch
      G02334054Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: GO TO  2.
    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", "RESUME/ACC SW", "SET SW" and "CANCEL SW" in "DATA MONITOR" mode with CONSULT-II.
    3. Check each item indication under the following conditions.
      Fig 2: ASCD Steering Switch Indication Chart - DTC P1564
      G02334055Courtesy of NISSAN MOTOR CO., U.S.A.
      Fig 3: MAIN SW, RESUME/ACC SW, SET SW & CANCEL SW Display In DATA MONITOR Mode With CONSULT-II
      G02334056Courtesy 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: ASCD Steering Switch Voltage Chart - DTC P1564
      G02334057Courtesy of NISSAN MOTOR CO., U.S.A.
      Fig 5: Checking Voltage Between ECM Terminal 99 & Ground
      G02334058Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: GO TO  8.
    2. 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 15 and ECM terminal 67. Refer to Wiring Diagram.
      1. Continuity should exist. 
    5. Also check harness for short to ground and short to power.

    OK or NG 

    1. OK: GO TO  5.
    2. 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
      1. Repair open circuit or short to ground 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 14. Refer to Wiring Diagram.
      1. Continuity should exist. 
    2. Also check harness for short to ground and short to power.

    OK or NG 

    1. OK: GO TO  7.
    2. NG: GO TO  6.
  6. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors M72, F102
    • Combination switch (spiral cable)
    • Harness for open and short between ECM and combination switch
      1. 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 

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

    Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

    1. : INSPECTION END 
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