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:

    Door switch
    Description Detects front door open/close condition. Component Function Check 1.CHECK FUNCTION With CONSULT Check front door switches DOOR SW-DR and DOOR SW-AS in Data Monitor mode with CONSULT. Diagnosis Procedure 1.CHECK FRONT DOOR SWITCH INPUT SIGNAL Turn ignition switch OFF. ...

    Power steering oil pump
    Exploded View Rear bracket Power steering oil pump assembly Front bracket Removal and Installation NOTE: When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spilling. REMOVAL Remove front wheel and tire (RH) using power tool. ...

    RGB synchronizing signal circuit
    Description Transmit the RGB synchronizing signal to the display unit so as to synchronize the RGB image displayed with AV control unit. Diagnosis Procedure 1.CHECK CONTINUITY RGB SYNCHRONIZING SIGNAL CIRCUIT Turn ignition switch OFF. Disconnect display unit connector M141 and AV co ...

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    Nissan Maxima Service and Repair Manual

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