Nissan Maxima Service and Repair Manual: Subwoofer
Description
The AV control unit sends audio signals to the subwoofer amp. The subwoofer
amp. amplifies the audio signals before sending them to the subwoofers using
the audio signal circuits.
Diagnosis Procedure
1.CONNECTOR CHECK
Check the AV control unit, subwoofer amp. and subwoofer connectors for the
following:
- Proper connection
- Damage
- Disconnected or loose terminals
2.HARNESS CHECK

- Disconnect subwoofer amp. connector B21 and suspect subwoofer
connector.
- Check continuity between subwoofer amp. harness connector B21
(A) and suspect subwoofer harness connector (B).
- Check continuity between subwoofer harness connector B21 (A) and
ground.


3.REAR SUBWOOFER SIGNAL CHECK

- Connect subwoofer amp. connector B21 and suspect subwoofer connector.
- Turn ignition switch to ACC.
- Push POWER switch.
- Check the signal between subwoofer amp. harness connector B21
terminals with CONSULT or oscilloscope.

4.HARNESS CHECK

- Disconnect AV control unit connector M115 and subwoofer speaker
amp. connector B21.
- Check continuity between AV control unit harness connector M115
(A) and subwoofer amp. harness connector B21 (B).
- Check continuity between AV control unit harness connector M115 (A)
terminal and ground


5.SUBWOOFER SIGNAL CHECK

- Connect AV control unit connector M115 and subwoofer amp.
connector
B21.
- Turn ignition switch to ACC.
- Push "POWER" switch.
- Check the signal between AV control unit harness connector M115
terminals with CONSULT or oscilloscope.

Description
The AV control unit sends audio signals to the rear door speakers using the
rear door speaker circuits.
Diagnosis Procedure
1.CONNECTOR CHECK
Check the AV control unit and speaker co ...
Description
When one of the steering wheel audio control switches is pushed, the
resistance in the steering wheel audio control switch circuit changes,
depending on which button is pushed.
Diagn ...
Other materials:
Seat memory switch
Description
Seat memory switch is installed to the front door LH trim. The operation
signal is input to the driver seat control unit when the seat memory switch
is operated.
Component Function Check
1. CHECK FUNCTION
Select ""MEMORY SW 1", "MEMORY SW 2", "SET SW" in "DATA MONITOR"
mode ...
System description
REFRIGERATION SYSTEM
Refrigerant Cycle
Refrigerant flow
Compressor
Pressure relief valve
Liquid tank
Refrigerant pressure sensor
Condenser
Expansion valve
Evaporator
Blower motor
High-pressure gas
High-pressure liquid
Low-pressure liquid
Low-pr ...
Bluetooth control unit
Reference Value
TERMINAL LAYOUT
PHYSICAL VALUES
...