Diagnostic Procedure

1. Turn ignition switch OFF.
2. Check the stop lamp when depressing and releasing the brake pedal.
   Fig 1: Stop Lamp Illuminating Condition

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OK or NG 

1. OK : GO TO  4
2. NG : GO TO 2.

1. Disconnect stop lamp switch harness connector.
   Fig 2: Identifying Stop Lamp Switch

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2. Check voltage between stop lamp switch terminal 1 (A/T models), + (M/T models) and ground with CONSULT-II or tester.
   1. Voltage: Battery voltage 
   Fig 3: Checking Voltage Between Stop Lamp Switch Terminal 1 And Ground (A/T Models)

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   Fig 4: Checking Voltage Between Stop Lamp Switch Terminal + And Ground (M/T Models)

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OK or NG 

1. OK : GO TO  4
2. NG : GO TO 3.

Check the following.

• 10A fuse
• Fuse block (J/B) connector M2
• 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.
4. Check harness continuity between ECM terminal 101 and stop lamp switch terminal 2 (A/T models), - (M/T models).
   1. Continuity should exist. 
5. Also check harness for short to ground and short to power.
   Fig 5: Identifying Stoplamp Switch And Brake Pedal

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

OK or NG 

1. OK : GO TO  6
2. NG : GO TO 5.

Check the following.

• Harness connectors M59, F27
• Harness for open or 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