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 U1601 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 B121 and front door speaker LH connector.

Check the continuity between Bose speaker amp. connector B121 and front door speaker LH connector D12.

Bose speaker amp.		Front door speaker LH		Continuity
Connector	Terminal	Connector	Terminal
B121	45	D12	1	Yes
	46		2

Disconnect front tweeter LH connector.

Check the continuity between Bose speaker amp. connector B121 and front tweeter LH connector M109.

Bose speaker amp.		Front tweeter LH		Continuity
Connector	Terminal	Connector	Terminal
B121	45	M109	1	Yes
	46		2

Is the inspection result normal?

YES

Replace front door speaker LH or front tweeter LH. Refer to Removal and Installation (front door speaker) or Removal and Installation (front tweeter).

Repair or replace harness or connectors.

CHECK SOUND SIGNAL CIRCUITS FOR SHORT

Turn ignition switch OFF.
Disconnect Bose speaker amp. connector B121, front door speaker LH connector and front tweeter LH connector.

Check the continuity between the terminals of Bose speaker amp. connector B121.

Bose speaker amp.			Continuity
Connector	Terminal
B121	45	46	No

Is the inspection result normal?

YES

Replace front door speaker LH or front tweeter LH. Refer to Removal and Installation (front door speaker) or Removal and Installation (front tweeter).

Repair or replace harness or connectors.

CHECK SOUND SIGNAL CIRCUITS FOR SHORT TO GROUND

Turn ignition switch OFF.
Disconnect Bose speaker amp. connector B121, front door speaker LH connector and front tweeter LH connector.

Check the continuity between Bose speaker amp. connector B121 and ground.

Bose speaker amp.		Continuity
Connector	Terminal			Ground
B121	45	--	No
	46

Is the inspection result normal?

YES

Replace front door speaker LH or front tweeter LH. Refer to Removal and Installation (front door speaker) or Removal and Installation (front 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 B121, front door speaker LH connector and front tweeter LH connector.
Turn ignition switch ON.

Check the voltage between Bose speaker amp. connector B121 and ground.

Bose speaker amp.		Ground	Voltage
Connector	Terminal
B121	45	--	0 V
	46

Is the inspection result normal?

YES

Replace front door speaker LH or front tweeter LH. Refer to Removal and Installation (front door speaker) or Removal and Installation (front tweeter).

Repair or replace harness or connectors.