Diagnosis Procedure

1. Turn ignition switch OFF.
2. Check the stop lamp when depressing and releasing the brake pedal.
   STOP LAMP SWITCH REFERENCE CHART
   
   

   Brake pedal	Stop lamp
   Fully released	Not illuminated
   Slightly depressed	Illuminated

   OK or NG 

   OK : GO TO  4.

   NG : GO TO 2.

1. Disconnect stop lamp switch (1) harness connector.
   • Brake pedal (2)
     Fig 1: Identifying Stop Lamp Switch And Brake Pedal

     Courtesy of NISSAN MOTOR CO., U.S.A.
2. Check voltage between stop lamp switch terminal 1 and ground with CONSULT-III or tester.
   Fig 2: Checking Voltage Between Stop Lamp Switch Terminal 1 And Ground

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

   Voltage: Battery voltage 

   OK or NG 

   OK : GO TO  4.

   NG : GO TO 3.

Check the following.

• Harness connectors M69, E7
• 10A fuse
• Harness for open and short between stop lamp switch and battery

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

1. Disconnect stop lamp switch (1) harness connector.
2. Disconnect ECM harness connector.
3. Check harness continuity between stop lamp switch terminal 2 and ECM terminal 99.

   Refer to Wiring Diagram.

   Continuity should exist  .

4. Also check harness for short to ground and short to power.

   OK or NG 

   OK : GO TO 5.

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

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK : GO TO 6.

NG : Replace stop lamp switch.

Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

INSPECTION END