Diagnostic Procedure

1. Turn ignition switch "OFF".
2. Check the stop lamp when depressing and releasing the brake pedal.
   Fig 1: Stop Lamp Switch Circuit Inspection Chart

   Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

1. OK GO TO  4 .
2. NG GO TO 2.

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 1 And Ground With CONSULT-II Or Tester

   Courtesy of NISSAN MOTOR CO., U.S.A.
   Fig 4: Checking Voltage Between Stop Lamp Switch Terminal 1 And Ground With CONSULT-II Or Tester (M/T Model)

   Courtesy of NISSAN MOTOR CO., U.S.A.

   Voltage: Battery voltage 

OK or NG 

1. OK GO TO  4 .
2. NG GO TO 3.

Check the following.

• 10A fuse
• Fuse block (J/B) connector M10
• Harness for open and short between stop lamp switch and battery

1. Repair open circuit or short to ground or short to power in harness or connectors.

1. Turn ignition switch "OFF".
2. Disconnect ECM harness connector.
3. Disconnect stop lamp switch harness connector.
   Fig 5: Identifying ASCD Brake Switch And Stop Lamp Switch

   Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check harness continuity between ECM terminal 101 and stop lamp switch terminal 2.

   Refer to WIRING DIAGRAM  .

   Continuity should exist. 

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.

Check the following.

• Harness connector M94, F27
• Harness for open and short between ECM and stop lamp switch

1. Repair open circuit or short to ground or short to power in harness or connectors.

Refer to "COMPONENT INSPECTION  " .

OK or NG 

1. OK GO TO 7.
2. NG Replace stop lamp switch.

Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT  " .

1. INSPECTION END