Power Supply Circuit Inspection

WARNING: This page is about a different car, the 2004 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FUSES

Check that the following fuses are not blown.

FUSE SPECIFICATION

Unit	Terminals	Signal name	Fuse No.
Audio unit	6	Battery power	31
Audio unit	10	Ignition switch ACC or ON	4
AV switch	1	Battery power	19
BOSE speaker amp. (with BOSE)	1	Battery power	31
Subwoofer (BOSE system)	6	Battery power	18

OK or NG

OK: GO TO 2.
NG: If fuse is blown, be sure to eliminate cause of problem before installing new fuse. Refer to SYSTEM WIRING DIAGRAMS .

POWER SUPPLY CIRCUIT CHECK

Disconnect audio unit, subwoofer (with BOSE) or BOSE speaker amp. (with BOSE) connector.

Check voltage between the audio unit and ground.

VOLTAGE SPECIFICATION

Unit	Terminal No.			OFF	ACC	ON
	(+)		(-)
	Connector	Terminal (wire color)
Audio unit	M43	6 (Y)	Ground	Battery voltage	Battery voltage	Battery voltage
		10 (V)	Ground	0 V	Battery voltage	Battery voltage

Fig 1: Checking Voltage Between Terminals 6 & 10 To Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

Check voltage between subwoofer (BOSE system) and ground.

VOLTAGE SPECIFICATION

Unit	Terminal No.			OFF	ACC	ON
	(+)		(-)
	Connector	Terminal (wire color)
Subwoofer	B11	6 (G/B)	Ground	Battery voltage	Battery voltage	Battery voltage

Fig 2: Checking Voltage Between Terminals 6 To Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

Check voltage between BOSE speaker amp. (with BOSE) and ground.

VOLTAGE SPECIFICATION

Unit	Terminal No.			OFF	ACC	ON
	(+)		(-)
	Connector	Terminal (wire color)
BOSE speaker amp.	M113	1 (Y)	Ground	Battery voltage	Battery voltage	Battery voltage

OK or NG

OK: GO TO 3.
NG:
- Check connector housings for disconnected or loose terminals.
- Repair harness or connector.

Fig 3: Checking Voltage Between Terminal 1 To Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

GROUND CIRCUIT CHECK
Check continuity between subwoofer (BOSE system) harness connector B11 terminal 5 (B) and BOSE speaker amp. (with BOSE) harness connector M113 terminal 17 (B) and ground.
1. Continuity should exist.
OK or NG
1. OK: INSPECTION END.
2. NG:
  - Check connector housings for disconnected or loose terminals.
  - Repair harness or connector.
  Fig 4: Checking Continuity Between Terminals 5 & 17 To Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.