Sound Is Not Heard From Rear Speaker or Rear Tweeter (Base and Mid Level System)

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.

HARNESS CHECK

Disconnect audio unit connector M44 and suspect speaker connector.

Check continuity between audio unit harness connector M44 terminal and suspect speaker harness connector terminal.

CONTINUITY SPECIFICATION

Terminals				Continuity
Audio unit		Speaker or tweeter
Connector	Terminal (Wire color)	Connector	Terminal (Wire color)
M44	13 (B/Y)	B45	-(B/Y)	Yes
	14 (G) or (G/R)		+ (G/R)
	15 (R/G)	B131	-(R)
	16 (L)		+ (L)
	13 (B/Y)	D516	-(B/Y)
	14 (G) or (G/R)		+ (G/R)
	15 (R/G)	D506	-(R)
	16 (L)		+ (L)

Check continuity between audio unit harness connector M44 terminal and ground.

Fig 1: Checking Continuity Between Audio Unit Harness Connector & Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

CONTINUITY SPECIFICATION

Terminals			Continuity
Audio unit		-
Connector	Terminal (Wire color)
M44	13 (B/Y)	Ground	No
	14 (G) or (G/R)
	15 (R/G)
	16 (L)

OK or NG

OK: GO TO 2.
NG:
- Check connector housings for disconnected or loose terminals.
- Repair harness or connector.

REAR SPEAKER SIGNAL CHECK
1. Connect audio unit connector and rear speaker connector.
2. Turn ignition switch to ACC.
3. Push "POWER" switch.
4. Check the signal audio unit harness connector terminal with CONSULT-II or oscilloscope.
  
  Fig 2: Voltage Signal Graph
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 3: Checking Voltages Between Connectors
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: Replace rear speaker. Refer to "REMOVAL AND INSTALLATION OF REAR SPEAKER " or Removal and Installation of Rear Tweeter .
2. NG: Replace audio unit. Refer to Removal and Installation for Audio Unit .