Diagnosis Procedure

WARNING: This page is about a different car, the 2008 Infiniti EX35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK OUTPUT 1 - 5 SYSTEM CIRCUIT FOR OPEN

Turn the ignition switch OFF.
Disconnect the BCM and combination switch connectors.
NOTE: BCM connector disconnects M123 only.

Check continuity between BCM harness connector and combination switch harness connector.

TERMINALS CONTINUITY REFERENCE

System	BCM		Combination switch		Continuity
System	Connector	Terminal	Connector	Terminal	Continuity
OUTPUT 1	M123	143	M33	12	Existed
OUTPUT 2		144		14
OUTPUT 3		145		5
OUTPUT 4		146		2
OUTPUT 5		142		8

Does continuity exist?

YES: GO TO 2.

NO: Repair the harnesses or connectors.

CHECK OUTPUT 1 - 5 SYSTEM CIRCUIT FOR SHORT

Check for continuity between BCM harness connector and ground.

TERMINALS CONTINUITY REFERENCE

System	BCM		Ground	Continuity
	Connector	Terminal
OUTPUT 1	M123	143		Not existed
OUTPUT 2		144
OUTPUT 3		145
OUTPUT 4		146
OUTPUT 5		142

Does continuity exist?

YES: Repair the harnesses or connectors.

NO: GO TO 3.

CHECK COMBINATION SWITCH INTERNAL CIRCUIT

Connect the combination switch connector.
Turn ON any switch in the system that is malfunctioning.

Check voltage between combination switch harness connector and ground.

NOTE: Check that the combination switch outputs a signal from combination switch input system.

VOLTAGE SPECIFICATION

System	Terminals			Value (Approx.)
	(+)		(-)
	Combination switch		Ground
	Connector	Terminal
OUTPUT 1	M33	12		Courtesy of NISSAN MOTOR CO., U.S.A.
OUTPUT 2		14
OUTPUT 3		5
OUTPUT 4		2
OUTPUT 5		8

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

YES: Replace BCM. Refer to EXPLODED VIEW

NO: Replace the combination switch.