Diagnostic Procedure

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 1: Displaying DATA MONITOR Screen
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 2: Displaying Switch Specifications Based On Conditions
  Courtesy 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 Voltage ECM Terminal 99 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 4: Displaying Switch Specifications Based On Conditions
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 7 .
2. NG: GO TO 2.
CHECK ASCD STEERING SWITCH GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
  
  Fig 5: Identifying ASCD Steering Switch
  Courtesy of NISSAN MOTOR CO., U.S.A.
2. Disconnect combination switch harness connector M102.
3. Disconnect ECM harness connector.
4. Disconnect TCM harness connector.
5. Check harness continuity between combination switch terminal 15 and ECM terminal 67, TCM terminal 42.
  Refer to WIRING DIAGRAM .
  1. Continuity should exist.
6. Also check harness for short to ground or short to power.
OK or NG
1. OK: GO TO 4 .
2. NG: GO TO 3.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E5, F14
- Harness connectors E19, F33
- Harness connectors E26, M91
- Combination switch (spiral cable)
- Harness for open and short between ECM and combination switch
- Harness for open and short between TCM and combination switch
  1. Repair open circuit or short to ground or short to power in harness or connectors.
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 6 .
2. NG: GO TO 5.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E26, M91
- 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.
CHECK ASCD STEERING SWITCH
Refer to COMPONENT INSPECTION .

OK or NG
1. OK: GO TO 7.
2. NG: Replace steering wheel.
CHECK INTERMITTENT INCIDENT
Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .
1. INSPECTION END