Sound Is Not Heard From Subwoofer

WARNING: This page is about a different car, the 2005 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FUSE

Check that the following fuse is not blown.

SUBWOOFER FUSE CHECK

Unit	Terminal	Signal name	Fuse No.
Subwoofer	6	Battery power	17

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 "POWER SUPPLY ROUTING CIRCUIT ".

POWER SUPPLY CIRCUIT CHECK
1. Disconnect subwoofer connector.
2. Check voltage between the subwoofer and ground.
  
  Fig 1: Subwoofer Connector Terminals And Ground Voltage Specifications
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 2: Checking Voltage Between Subwoofer Connector Terminals And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: GO TO 3.
- NG:
  - Check connector housings for disconnected or loose terminals.
  - Repair harness or connector.
GROUND CIRCUIT CHECK
Check continuity between subwoofer harness connector B72 terminal 5 (B) and ground.
- Continuity should exist.
OK or NG
- OK: GO TO 4.
- NG:
  - Check connector housings for disconnected or loose terminals.
  - Repair harness or connector.
Fig 3: Checking Continuity Between Subwoofer Harness Connector B72 Terminal 5 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK SUBWOOFER AMP. ON SIGNAL
1. Operate system and check voltage between subwoofer harness connector B72 terminal 4 (W/G) and ground.
  - Voltage: More than approx. 6.5V
OK or NG
- OK: GO TO 5.
- NG:
  - Check connector housings for disconnected or loose terminals.
  - Repair harness or connector.
Fig 4: Checking Voltage Between Subwoofer Harness Connector B72 Terminal 4 (W/G) And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
HARNESS CHECK
1. Disconnect BOSE speaker amp. connector M112 and subwoofer connector B72.
2. Check continuity between BOSE speaker amp. harness connector terminal and subwoofer harness connector harness connector terminal.
  
  Fig 5: BOSE Speaker Amp. Connector M112 And Subwoofer Connector B72 Terminal Continuity Specifications
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 6: Checking Continuity Between BOSE Speaker Amp. Connector Terminal And Subwoofer Harness Connector Terminal
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check continuity between BOSE speaker amp. harness connector terminal and ground.
  
  Fig 7: BOSE Speaker Amp. Harness Connector Terminals Continuity Specifications
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: GO TO 6.
- NG:
  - Check connector housings for disconnected or loose terminals.
  - Repair harness or connector.
SUBWOOFER SIGNAL CHECK
1. Connect BOSE speaker amp. connector and subwoofer connector.
2. Turn ignition switch to ACC.
3. Check the signal between BOSE speaker amp. harness connector terminals with CONSULT-II or oscilloscope.
  
  Fig 8: BOSE Speaker Amp. Harness Connector M112 Terminals, Reference Signal Specifications
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 9: Checking Signal Between BOSE Speaker Amp. Harness Connector Terminals With CONSULT-II Or Oscilloscope
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: Replace subwoofer. Refer to "REMOVAL AND INSTALLATION OF SUBWOOFER ".
- NG: Replace BOSE speaker amp. Refer to "REMOVAL AND INSTALLATION OF BOSE SPEAKER AMP. "