Diagnosis Procedure

1. CHECK IGNITION RELAY FEEDBACK INPUT SIGNAL

   Check voltage between BCM harness connector and ground under the following conditions.

   VOLTAGE SPECIFICATION
   
   

   Terminals			Condition		Voltage (V)
   (+)		(-)
   BCM		Ground
   Connector	Terminal
   M18	31		Ignition switch	OFF	0
   				ON	Battery voltage

   Fig 1: Checking Voltage Between BCM Harness Connector And Ground

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

   Is the inspection result normal? 

   YES: Replace BCM. Refer to "REMOVAL AND INSTALLATION ".

   NO: GO TO 2

2. CHECK IGNITION RELAY FEEDBACK CIRCUIT
   1. Turn ignition switch OFF.
   2. Disconnect BCM and fuse block (J/B).
   3. Check continuity between BCM harness connector and fuse block harness connector.
      CONTINUITY SPECIFICATION
      
      

      BCM		Fuse block		Continuity
      Connector	Terminal	Connector	Terminal
      M18 (A)	31	M3 (B)	2N	Yes

      Fig 2: Checking Continuity Between BCM Harness Connector And Fuse Block Harness Connector

      Courtesy of NISSAN MOTOR CO., U.S.A.
   4. Check continuity between BCM harness connector and ground.
   CONTINUITY SPECIFICATION
   
   

   BCM		Ground	Continuity
   Connector	Terminal
   M18	31		No

   Fig 3: Checking Continuity Between BCM Harness Connector And Ground

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

   Is the inspection result normal? 

   YES: GO TO 3

   NO: Repair or replace harness.

3. CHECK INTERMITTENT INCIDENT

Refer to "INTERMITTENT INCIDENT ".

Inspection End.