Diagnosis Procedure

1. Turn ignition switch OFF.
2. Check the stop lamp illumination under the following conditions.
   STOP LAMP CONDITION CHART
   
   

   Condition		Stop lamp
   Brake pedal	Fully released	Not illuminated
   	Slightly depressed	Illuminated

   Is the inspection result normal? 

   YES: GO TO  4.

   NO: GO TO 2.

1. Disconnect stop lamp switch harness connector.
2. Check the voltage between stop lamp switch harness connector and ground.
   CONNECTOR TERMINAL VOLTAGE CHART
   
   

   Stop lamp switch		Ground	Voltage
   Connector	Terminal
   E124	1	Ground	Battery voltage

   Fig 1: Checking Voltage Between Stop Lamp Switch Terminal 3 And Ground

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

   Is the inspection result normal? 

   YES: GO TO  4.

   NO: GO TO 3.

Check the following.

• Fuse block (J/B) connector E101
• 10 A fuse (No. 20)
• Harness for open or short between stop lamp switch and battery

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

1. Disconnect stop lamp switch harness connector.
2. Disconnect ECM harness connector.
3. Check the continuity between stop lamp switch harness connector and ECM harness connector.
   CONNECTOR TERMINAL CONTINUITY CHART
   
   

   Stop lamp switch		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   E124	2	M9	122	Existed

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

   Is the inspection result normal? 

   YES: GO TO  6.

   NO: GO TO 5.

Check the following.

• Harness connectors E108, M15
• Harness for open or short between ECM and stop lamp switch

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

Refer to "COMPONENT INSPECTION (STOP LAMP SWITCH) ".

Is the inspection result normal? 

YES: GO TO 7.

NO: Replace stop lamp switch.

Refer to "DESCRIPTION ".

INSPECTION END