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.
  
  Fig 1: Displaying CONSULT-II DATA MONITOR Screen
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check each item indication under the following conditions.
  
  Fig 2: Listing ASCD Steering Switch Conditions
  Courtesy of NISSAN MOTOR CO., U.S.A.
Without CONSULT-II
1. Turn ignition switch ON
2. Check voltage between ECM terminal 50 and ground with pressing each button.
  
  Fig 3: Checking Voltage Between ECM And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 4: Listing ASCD Steering Switch Conditions
  Courtesy of NISSAN MOTOR CO., U.S.A.
Refer to Wiring Diagram.

OK or NG
1. OK: GO TO 4 .
2. NG: GO TO 2.
CHECK ASCD STEERING SWITCH GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ASCD steering harness connector.
3. Check harness continuity between switch terminal 2 and ground. Refer to Wiring Diagram.
  
  Fig 5: Checking Harness Continuity Between Switch And Ground
  Courtesy 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.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors M223, F53
- Joint connector-20
- Combination switch (spiral cable)
- Harness for open and short between ECM and ASCD steering switch
1. : Repair open circuit or short to power in harness or connectors.
CHECK ASCD STEERING SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 50 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.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors M223, F53
- Combination switch (spiral cable)
- 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.
CHECK ASCD STEERING SWITCH
Refer to COMPONENT INSPECTION .

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