Diagnosis Procedure

Regarding Wiring Diagram information, refer to "Wiring Diagram ".

1. CHECK INPUT 1 - 5 SYSTEM CIRCUIT FOR OPEN
   1. Turn the ignition switch OFF.
   2. Disconnect the BCM and combination switch.
   3. Check continuity between BCM harness connector and combination switch harness connector.

   System	BCM		Combination switch		Continuity
   	Connector	Terminal	Connector	Terminal
   INPUT 1	M19 (A)	95	M28 (B)	11	Yes
   INPUT 2		97		9
   INPUT 3		76		7
   INPUT 4		96		10
   INPUT 5		75		13

   Fig 1: Checking Continuity Between BCM Harness Connector And Combination Switch Harness Connector

   Courtesy of NISSAN NORTH AMERICA, INC.

   Does continuity exist? 

   YES: GO TO 2

   NO: Repair or replace harness.

2. CHECK INPUT 1 - 5 SYSTEM CIRCUIT FOR SHORT

   Check for continuity between BCM harness connector and ground.

   System	BCM		Ground	Continuity
   	Connector	Terminal
   INPUT 1	M19	95		No
   INPUT 2		97
   INPUT 3		76
   INPUT 4		96
   INPUT 5		75

   Fig 2: Checking For Continuity Between BCM Harness Connector And Ground

   Courtesy of NISSAN NORTH AMERICA, INC.

   Does continuity exist? 

   YES: Repair or replace harness.

   NO: GO TO 3

3. CHECK BCM INPUT SIGNAL
   1. Connect the combination switch.
   2. Turn ON any switch in the system that is malfunctioning.
   3. Check voltage between BCM harness connector and ground.
   Fig 3: Checking Voltage Between BCM Harness Connector And Ground

   Courtesy of NISSAN NORTH AMERICA, INC.

   System	Terminals			Voltage (Approx.)
   	(+)		(-)
   	BCM		Ground
   	Connector	Terminal
   INPUT 1	M19	95		Refer to "Physical Values ".
   INPUT 2		97
   INPUT 3		76
   INPUT 4		96
   INPUT 5		75

   Is the measurement normal when any of the switches is turned ON? 

   YES: Replace BCM. Refer to "Removal and Installation ".

   NO: GO TO 4

4. CHECK COMBINATION SWITCH

   Check combination switch. Refer to "Symptom Table ".

   Is the inspection result normal? 

   YES: Replace BCM. Refer to "Removal and Installation ".

   NO: Replace the combination switch. Refer to "REMOVAL AND INSTALLATION ".