Nissan Altima 2007-2012 Service Manual: Electrical load signal

Description

The electrical load signal (Headlamp switch signal, rear window defogger switch signal, etc.) is transferred via the CAN communication.

Component Function Check

1.CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION

1. Turn ignition switch ON.

2. Connect CONSULT-III and select “DATA MONITOR” mode.

3. Select “LOAD SIGNAL” and check indication under the following conditions.

Is the inspection result normal? YES >> GO TO 2.

NO >> Go to EC-1478, "Diagnosis Procedure".

2.CHECK LIGHTING SWITCH FUNCTION

Check “LOAD SIGNAL” indication under the following conditions.

Is the inspection result normal? YES >> GO TO 3.

NO >> Go to EC-1478, "Diagnosis Procedure".

3.CHECK HEATER FAN CONTROL SWITCH FUNCTION

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

Is the inspection result normal? YES >> INSPECTION END

NO >> Go to EC-1478, "Diagnosis Procedure".

Diagnosis Procedure

1.INSPECTION START

Confirm the malfunctioning circuit (rear window defogger, headlamp or heater fan). Refer to EC-1478, "Component Function Check".

Which circuit is related to the incident? Rear window defogger>>GO TO 2.

Headlamp>>GO TO 3.

Heater fan>>GO TO 4.

2.CHECK REAR WINDOW DEFOGGER SYSTEM

Refer to DEF-3, "Work Flow".

>> INSPECTION END

3.CHECK HEADLAMP SYSTEM

Refer to EXL-4, "Work Flow".

>> INSPECTION END

4.CHECK HEATER FAN CONTROL SYSTEM

Refer to HAC-4, "Work Flow" (automatic air conditioner) or HAC-101, "Work Flow" (manual air conditioner).

>> INSPECTION END

    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 cont ...

    Electronic controlled engine mount
    Description The electronic controlled engine mount control solenoid valve controls the intake manifold vacuum signal for electronic controlled engine mount. The electronic controlled engine mount ...

    Other materials:

    Spark plug
    Removal and Installation 1. Ignition coil 2. Spark plug 3. Rocker cover RH 4. Rocker cover LH REMOVAL 1. Remove the ignition coil. Refer to EM-145, "Removal and Installation LH" and EM-145, "Removal and Installation RH". 2. Remove the spark plug with a suitable spa ...

    Power supply and ground circuit (sedan)
    AUDIO UNIT  Diagnosis Procedure 1.CHECK FUSES Check that the following fuses are not blown. Are the fuses OK? YES >> GO TO 2 NO >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. 2.POWER SUPPLY CIRCUIT CHECK 1. Disconnect audio u ...

    Monitor, climate, audio, phone and voice recognition systems
    WARNING ● Positioning of the heating or air conditioning controls and display controls should not be done while driving in order that full attention may be given to the driving operation. ● Do not disassemble or modify this system. If you do, it may result in accidents, fire, o ...