Diagnosis Procedure

WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

CHECK COMMUNICATION SIGNAL CIRCUIT (A/C AUTO AMP. --> REAR AIR CONTROL) FOR OPEN

Turn ignition switch OFF.
Disconnect rear air control and A/C auto amp. connector.

Check continuity between rear air control harness connector and A/C auto amp. harness connector.

Rear air control		A/C auto amp.		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M258	9	M50	5	Yes

Is the inspection result normal?

YES

GO TO 2.

Repair harness or connector.

CHECK COMMUNICATION SIGNAL CIRCUIT (A/C AUTO AMP. --> REAR AIR CONTROL) FOR SHORT

Check continuity between rear air control harness connector and ground.

Rear air control		--	Continuity
Connector	Terminal
M258	9	Ground	No

Is the inspection result normal?

YES

GO TO 3.

Repair harness or connector.

CHECK COMMUNICATION SIGNAL CIRCUIT (REAR AIR CONTROL --> A/C AUTO AMP.) CIRCUIT FOR OPEN

Check continuity between rear air control harness connector and A/C auto amp. harness connector.

Rear air control		A/C auto amp.		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M258	10	M50	25	Yes

Is the inspection result normal?

YES

GO TO 4.

Repair harness or connector.

CHECK COMMUNICATION SIGNAL CIRCUIT (REAR AIR CONTROL --> A/C AUTO AMP.) CIRCUIT FOR SHORT

Check continuity between rear air control harness connector and ground.

Rear air control		--	Continuity
Connector	Terminal
M258	10	Ground	No

Is the inspection result normal?

YES

Replace A/C auto amp. Refer to Removal and Installation .

Repair harness or connector.