Nissan Maxima Service and Repair Manual: Check cooling fan relay

Description

The electrical load signal (Headlamp switch signal, rear window defogger switch signal, etc.) is transferred via the CAN communication line from BCM to ECM via the IPDM E/R.

Component Function Check

1.CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION

  1. Turn ignition switch ON.
  2. Connect CONSULT and select "DATA MONITOR" mode.
  3. Select "LOAD SIGNAL" and check indication under the following conditions.

Nissan Maxima. CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION

2.CHECK LIGHTING SWITCH FUNCTION

Check "LOAD SIGNAL" indication under the following conditions.

Nissan Maxima. CHECK LIGHTING SWITCH FUNCTION

3.CHECK HEATER FAN CONTROL SWITCH FUNCTION

Select "HEATER FAN SW" and check indication under the following conditions.

Nissan Maxima. CHECK HEATER FAN CONTROL SWITCH FUNCTION

Diagnosis Procedure

1.INSPECTION START

Confirm the malfunctioning circuit (rear window defogger, headlamp or heater fan).

2.CHECK REAR WINDOW DEFOGGER SYSTEM

3.CHECK HEADLAMP SYSTEM

4.CHECK HEATER FAN CONTROL SYSTEM

    Cooling fan
    Description The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, refrigerant pressure, and air conditioner ON signal. The control system has 4-step con ...

    Electronic controlled engine mount
    Description In the idle range, ECM turns OFF the electronically-controlled engine mount control solenoid valve and applies manifold pressure to the electronically controlled engine mount. This de ...

    Other materials:

    Power steering oil pump
    Inspection CAUTION: Make sure that belt tension is normal before starting the following procedure. Connect the Tool between oil pump discharge connector and high-pressure hose. Bleed air from the hydraulic circuit while opening the shut-off valve fully. Refer to ST-12, "Inspection". ...

    Answer back horn feature
    If desired, the answer back horn feature can be deactivated using the Intelligent Key. When it is deactivated and the LOCK  button is pushed, the hazard indicator lights flash twice. When the UNLOCK button is pushed, neither the hazard indicator lights nor the horn operates. NO ...

    Wiring diagram
    WARNING CHIME SYSTEM Wiring Diagram           ...

    Nissan Maxima Owners Manual

    Nissan Maxima Service and Repair Manual

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