Diagnostic Procedure

WARNING: This page is about a different car, the 2005 Infiniti FX45. However, it is still accessible from the selected car via links, so may be relevant.

CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body. Refer to "GROUND INSPECTION ".
  
  Fig 1: Checking Ground Connections
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 2.
2. NG: Repair or replace ground connections.
CHECK ICC STEERING SWITCH CIRCUIT
With CONSULT-II
1. Turn ignition switch ON.
2. Select "MAIN SW", "CANCEL SW", "RESUME/ACC SW", "SET SW" and "DIST SW" in "DATA MONITOR" mode with CONSULT-II.
3. Check each item indication under the following conditions.
  
  Fig 2: Switch Monitor Item Condition Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 3: Displaying Data Monitor
  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 4: Switch Condition And Voltage Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 5: Checking Voltage Between ECM Terminal 99 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 8 .
2. NG: GO TO 3.
CHECK ICC 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 82. 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.
DETECT MALFUNCTIONING PART
Check the following.
- 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 ICC 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.
DETECT MALFUNCTIONING PART
Check the following.
- 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 ICC STEERING SWITCH
Refer to "COMPONENT INSPECTION ".

OK or NG
1. OK: GO TO 8.
2. NG: Replace ICC steering switch.
CHECK INTERMITTENT INCIDENT
Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".
1. : INSPECTION END