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 U176A 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 side speaker LH connector.

Check the continuity between Bose speaker amp. connector B122 and rear side speaker LH connector B1.

Bose speaker amp.		Rear side speaker LH		Continuity
Connector	Terminal	Connector	Terminal
B122	62	B1	1	Yes
	73		2

Is the inspection result normal?

YES

Replace rear side speaker LH. Refer to Removal and Installation .

Repair or replace harness or connectors.

CHECK SOUND SIGNAL CIRCUITS FOR SHORT

Turn ignition switch OFF.
Disconnect Bose speaker amp. connector B122 and rear side speaker LH connector.

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

Bose speaker amp.			Continuity
Connector	Terminal
B122	62	73	No

Is the inspection result normal?

YES

Replace rear side speaker LH. Refer to Removal and Installation .

Repair or replace harness or connectors.

CHECK SOUND SIGNAL CIRCUITS FOR SHORT TO GROUND

Turn ignition switch OFF.
Disconnect Bose speaker amp. connector B122 and rear side speaker LH connector.

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

Bose speaker amp.		Continuity
Connector	Terminal			Ground
B122	62	--	No
	73

Is the inspection result normal?

YES

Replace rear side speaker LH. Refer to Removal and Installation .

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 and rear side speaker LH connector.
Turn ignition switch ON.

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

Bose speaker amp.		Ground	Voltage
Connector	Terminal
B122	62	--	0 V
	73

Is the inspection result normal?

YES

Replace rear side speaker LH. Refer to Removal and Installation .

Repair or replace harness or connectors.