Diagnostic Procedure

CHECK STOP LAMP SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Check the stop lamp when depressing and releasing the brake pedal.
Fig 1: Displaying Stop Lamp Operation
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK: GO TO 4 .
2. NG: GO TO 2.
CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1. Disconnect stop lamp switch harness connector.
  
  Fig 2: Identifying ASCD Brake Switch And Stop Lamp Switch
  Courtesy of NISSAN MOTOR CO., U.S.A.
2. Check voltage between stop lamp switch terminal 1 and ground with CONSULT-II or tester.
  
  Fig 3: Checking Voltage Between Stop Lamp Switch Terminal And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
Voltage: Battery voltage

OK or NG
1. OK: GO TO 4 .
2. NG: GO TO 2.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors M15, E81
- 15A fuse
- Fuse block (J/B) connector M17
- Harness for open and short between stop lamp switch and battery
OK or NG
1. : Repair open circuit or short to ground or short to power in harness or connectors.
CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Disconnect stop lamp switch harness connector. See Fig 2 .
4. Check harness continuity between ECM terminal 55 and stop lamp switch terminal 2.
  Refer to Wiring Diagram.
  
  Continuity should exit.
5. 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 E81, M15
- Harness connectors M223, F53
- Harness for open or short between ECM and stop lamp switch
OK or NG
1. OK: Repair open circuit or short to ground or short to power in harness or connectors.
CHECK STOP LAMP SWITCH
Refer to COMPONENT INSPECTION .

OK or NG
1. OK: GO TO 7.
2. NG: Replace stop lamp switch.
CHECK INTERMITTENT INCIDENT
Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

OK or NG
1. : INSPECTION END