Diagnosis Procedure

WARNING: This page is about a different car, the 2013 Infiniti M56 and 2013 Infiniti M37. However, it is still accessible from the selected car via links, so may be relevant.

CHECK CONTINUITY DRIVE MODE SELECT SWITCH SIGNAL CIRCUIT

Turn ignition switch OFF.
Disconnect the drive mode select switch connector and A/C auto amp. connector.

Check continuity between drive mode select switch harness connector and A/C auto amp. harness connector.

Drive mode select switch		A/C auto amp.		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M203	1	M66	23	Existed
	2		24
	3		25
	4		26

Check continuity between drive mode select switch harness connector and ground.

Drive mode select switch		Ground	Continuity
Connector	Terminal
M203	1		Not existed
	2
	3
	4

Is the inspection result normal?

YES: GO TO 2

NO: Repair harness or connector

CHECK VOLTAGE OF A/C AUTO AMP.

Connect the A/C auto amp. connector.

Check voltage between A/C auto amp. harness connector and ground.

Terminals			Voltage (Approx.)
(+)		(-)
A/C auto amp.		Ground
Connector	Terminal
M66	23		12 V
	24
	25
	26

Is the inspection result normal?

YES: GO TO 3

NO: Replace A/C auto amp.

CHECK DRIVE MODE SELECT SWITCH GROUND CIRCUIT

Check continuity drive mode select switch harness connector and ground.

Drive mode select switch		Ground	Continuity
Connector	Terminal
M203	6		Existed

Is the inspection result normal?

YES: Check drive mode select switch. Refer to "COMPONENT INSPECTION ".

NO: Repair harness or connector.