Nissan Maxima Service and Repair Manual: Power supply and ground circuit

A/C AUTO AMP.

A/C AUTO AMP.: Description

COMPONENT DESCRIPTION

A/C Auto Amp. (Air Conditioner Automatic Amplifier) The A/C auto amp. (1) has a built-in microcomputer that processes information sent from various sensors needed for air conditioner operation. The air mix door motor(s), the mode door motor, the intake door motor, the blower motor and the compressor are then controlled.

When the various switches and temperature control dial are operated, data is input to the A/C auto amp. from the AV control unit using CAN communication.

The A/C auto amp. is operated with control mechanisms. Signals from various switches and Potentio Temperature Control (PTC) are directly entered into the A/C auto amp.

Nissan Maxima. COMPONENT DESCRIPTION

Power Supply and Ground Circuit for A/C Auto Amp.

Nissan Maxima. COMPONENT DESCRIPTION

A/C AUTO AMP.: Component Function Check

1.CHECK OPERATION

  1. Press the AUTO switch, and then check that "AUTO" is shown on the display.
  2. Operate the temperature control dial (driver side). Check that the fan speed or outlet changes. (The discharge air temperature or fan speed varies depending on the ambient temperature, in-vehicle temperature, and temperature setting.)

A/C AUTO AMP.: Diagnosis Procedure

1.CHECK FOR AUDIO DTCS WITH CONSULT

Using CONSULT, perform "SELF-DIAGNOSIS RESULTS" of MULTI AV.

2.CHECK A/C AUTO AMP. POWER SUPPLY

Nissan Maxima. CHECK A/C AUTO AMP. POWER SUPPLY

  1. Turn ignition switch OFF.
  2. Disconnect the A/C auto amp. connector.
  3. Turn ignition switch ON.
  4. Check voltage between A/C auto amp. harness connector M37 terminal 17, 20, 40 and ground.

Nissan Maxima. CHECK A/C AUTO AMP. POWER SUPPLY

3.CHECK FUSE

Check 10A fuses [Nos. 3, 6 and 17, located in the fuse block (J/B)].

4.CHECK A/C AUTO AMP. GROUND CIRCUIT

  1. Turn ignition switch OFF.
  2. Check continuity between A/C auto amp. harness connector M37 terminals 19, 39 and ground.

19, 39 - Ground: Continuity should exist.

A/C AND AV SWITCH ASSEMBLY

A/C AND AV SWITCH ASSEMBLY: Component Function Check

1.CHECK OPERATION

  1. Press the AUTO switch, and then check that "AUTO" is shown on the display.
  2. Operate the temperature control dial (driver side). Check that the fan speed or outlet changes. (The discharge air temperature or fan speed varies depending on the ambient temperature, in-vehicle temperature, and temperature setting.)

A/C AND AV SWITCH ASSEMBLY: Diagnosis Procedure

1.CHECK FOR AUDIO DTCS WITH CONSULT

Using CONSULT, perform "SELF-DIAGNOSIS RESULTS" of MULTI AV.

2.CHECK A/C AND AV SWITCH ASSEMBLY POWER SUPPLY

Nissan Maxima. CHECK A/C AND AV SWITCH ASSEMBLY POWER SUPPLY

  1. Disconnect the A/C and AV switch assembly connector.
  2. Check voltage between A/C and AV switch assembly harness connector M98 terminal 3 and ground.

Nissan Maxima. CHECK A/C AND AV SWITCH ASSEMBLY POWER SUPPLY

3.CHECK FUSE

Check 10A fuse [No.17, located in the fuse block (J/B)].

4.CHECK A/C AND AV SWITCH ASSEMBLY GROUND CIRCUIT

  1. Turn ignition switch OFF.
  2. Check continuity between A/C and AV switch assembly harness connector M98 terminal 1 and ground.

Nissan Maxima. CHECK A/C AND AV SWITCH ASSEMBLY GROUND CIRCUIT

1 - Ground: Continuity should exist.

    Magnet clutch
    Description SYSTEM DESCRIPTION A/C auto amp. controls A/C compressor operation by ambient temperature and signal from ECM. Low Temperature Protection Control A/C auto amp. will turn the A/ ...

    ECU diagnosis information
    A/C AUTO AMP Reference Value VALUES ON THE DIAGNOSIS TOOL CONSULT MONITOR ITEM A/C AUTO AMP. HARNESS CONNECTOR TERMINAL LAYOUT TERMINALS AND REFERENCE VALUES FOR A/C AUTO AMP. Fa ...

    Other materials:

    Subwoofer AMP
    Removal and Installation Subwoofer amp. and bracket Subwoofer amp. bracket screws REMOVAL Disconnect the battery negative terminal. Refer to PG-67, "Removal and Installation (Battery)". Remove the parcel shelf finisher. Refer to INT-28, "Removal and Installation". NOTE: The ...

    Rear-facing child restraint installation using the seat belts
    WARNING The three-point seat belt with Automatic Locking Retractor (ALR) must be used when installing a child restraint. Failure to use the ALR mode will result in the child restraint not being properly secured. The restraint could tip over or be loose and cause injury to a child in a sudden ...

    Memory function does not operate
    Component Function Check Symptom Memory function does not operate normally. The setting is not maintained. (It returns to the initial condition.) 1.CHECK OPERATION Set temperature control dial to 32C (90F). Press the OFF switch. Turn the ignition switch OFF. Turn the ignition ...

    Nissan Maxima Owners Manual

    Nissan Maxima Service and Repair Manual

    © 2017-2025 Copyright www.nimainfo.com
    0.0069