Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

CONNECTOR CHECK
Check the AV control unit, Bose speaker amp. and tweeter connectors for the following:
- Proper connection
- Damage
- Disconnected or loose terminals
Is the inspection result normal?

YES

GO TO 2 .

NO

Repair the terminals or connectors.

CHECK TWEETER SIGNAL CIRCUIT CONTINUITY (BOSE SPEAKER AMP.)

Disconnect Bose speaker amp. connector B109 and suspect tweeter connector.

Check continuity between Bose speaker amp. connector B109 and suspect tweeter connector.

Bose speaker amp.		Tweeter		Continuity
Connector	Terminal	Connector	Terminal
B109	16	M143 (LH)	1	Yes
	29		2
	31	M144 (RH)	1
	30		2

Check continuity between Bose speaker amp. connector B109 and ground.

Bose speaker amp.		Ground	Continuity
Connector	Terminal
B109	16	-	No
	29
	31
	30

Is the inspection result normal?

YES

GO TO 3 .

Repair or replace harness or connectors.

CHECK TWEETER SIGNAL (BOSE SPEAKER AMP.)

Connect Bose speaker amp. connector B109 and suspect tweeter connector.
Turn ignition switch to ON.
Push AV control unit POWER switch.

Check signal between the terminals of Bose speaker amp. connector B109.

Bose speaker amp. connector B109		Condition	Reference value
(+)	(-)
Terminal	Terminal
16	29	Audio signal output	Courtesy of NISSAN NORTH AMERICA, INC.
31	30

Is the inspection result normal?

YES

Replace tweeter. Refer to Removal and Installation .

GO TO 4 .

CHECK TWEETER SIGNAL CIRCUIT CONTINUITY (AV CONTROL UNIT)

Turn ignition switch to OFF.
Disconnect Bose speaker amp. connector B149 and AV control unit connector M162.

Check continuity between Bose speaker amp. connector B149 and AV control unit connector M162.

Bose speaker amp.		AV control unit		Continuity
Connector	Terminal	Connector	Terminal
B149	62	M162	2	Yes
	42		3
	63		11
	43		12

Check continuity between Bose speaker amp. connector B149 and ground.

Bose speaker amp.		Ground	Continuity
Connector	Terminal
B149	62	-	No
	42
	63
	43

Is the inspection result normal?

YES

GO TO 5 .

Repair or replace harness or connectors.

CHECK TWEETER SIGNAL (AV CONTROL UNIT)

Connect Bose speaker amp. connector B149 and AV control unit connector M162.
Turn ignition switch to ON.
Push AV control unit POWER switch.

Check signal between AV control unit connector M162 and ground.

AV control unit connector M162		Condition	Reference value
(+)	(-)
Terminal	Terminal
2	3	Audio signal output	Courtesy of NISSAN NORTH AMERICA, INC.
11	12

Is the inspection result normal?

YES

Replace Bose speaker amp. Refer to Removal and Installation .

Replace AV control unit. Refer to Removal and Installation .