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.

DETERMINE MALFUNCTION TYPE
With CONSULT
1. Turn ignition switch ON.
2. Turn ignition switch OFF and wait at least 30 seconds.
3. Turn ignition switch ON and wait at least 30 seconds or more.
4. Select "Self Diagnostic Result" mode of "MULTI AV" using CONSULT.
5. Check DTC.
Is DTC U168C detected?

YES

GO TO 2.

YES

GO TO 3.

YES

GO TO 4.

YES

GO TO 5.

NO

Refer to Intermittent Incident .

CHECK SOUND SIGNAL CIRCUITS FOR OPEN

Turn ignition switch OFF.
Disconnect Bose speaker amp. connector B122 and rear door speaker RH connector.

Check the continuity between Bose speaker amp. connector B122 and rear door speaker RH connector D307.

Bose speaker amp.		Rear door speaker RH		Continuity
Connector	Terminal	Connector	Terminal
B122	64	D307	1	Yes
	75		2

Disconnect rear door tweeter RH connector.

Check the continuity between Bose speaker amp. connector B122 and rear door tweeter RH connector D352.

Bose speaker amp.		Rear door tweeter RH		Continuity
Connector	Terminal	Connector	Terminal
B122	64	D352	1	Yes
	75		2

Is the inspection result normal?

YES

Replace rear door speaker RH or rear door tweeter RH. Refer to Removal and Installation (rear door speaker) or Removal and Installation (rear door tweeter).

Repair or replace harness or connectors.

CHECK SOUND SIGNAL CIRCUITS FOR SHORT

Turn ignition switch OFF.
Disconnect Bose speaker amp. connector B122, rear door speaker RH connector and rear door tweeter RH connector.

Check the continuity between the terminals of Bose speaker amp. connector B122.

Bose speaker amp.			Continuity
Connector	Terminal
B122	64	75	No

Is the inspection result normal?

YES

Replace rear door speaker RH or rear door tweeter RH. Refer to Removal and Installation (rear door speaker) or Removal and Installation (rear door tweeter).

Repair or replace harness or connectors.

CHECK SOUND SIGNAL CIRCUITS FOR SHORT TO GROUND

Turn ignition switch OFF.
Disconnect Bose speaker amp. connector B122, rear door speaker RH connector and rear door tweeter RH connector.

Check the continuity between Bose speaker amp. connector B122 and ground.

Bose speaker amp.		Continuity
Connector	Terminal			Ground
B122	64	--	No
	75

Is the inspection result normal?

YES

Replace rear door speaker RH or rear door tweeter RH. Refer to Removal and Installation (rear door speaker) or Removal and Installation (rear door tweeter).

Repair or replace harness or connectors.

CHECK SOUND SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY

Turn ignition switch OFF.
Disconnect Bose speaker amp. connector B122, rear door speaker RH connector and rear door tweeter RH connector.
Turn ignition switch ON.

Check the voltage between Bose speaker amp. connector B122 and ground.

Bose speaker amp.		Ground	Voltage
Connector	Terminal
B122	64	--	0 V
	75

Is the inspection result normal?

YES

Replace rear door speaker RH or rear door tweeter RH. Refer to Removal and Installation (rear door speaker) or Removal and Installation (rear door tweeter).

Repair or replace harness or connectors.