Nissan Altima 2007-2012 Service Manual: Both side headlamps do not switch to high beam

Description

The headlamps (both sides) do not switch to high beam when the lighting switch is in the HI or PASS setting.

Diagnosis Procedure

1.COMBINATION SWITCH INSPECTION

Check the combination switch. Refer to BCS-10, "System Description".

Is the combination switch normal? YES >> GO TO 2

NO >> Repair or replace the malfunctioning part.

2.CHECK HEADLAMP (HI) REQUEST SIGNAL INPUT

1. Select "HL HI REQ" of IPDM E/R DATA MONITOR item.

2. With operating the lighting switch, check the monitor status.

Is the item status normal? YES >> GO TO 3

NO >> Replace BCM. Refer to BCS-96, "Removal and Installation" .

3.HEADLAMP (HI) CIRCUIT INSPECTION

Check the headlamp (HI) circuit. Refer to EXL-40, "Description".

Is the headlamp (HI) circuit normal? YES >> Replace IPDM E/R. Refer to PCS-48, "Removal and Installation" .

NO >> Repair or replace the malfunctioning part.

    Normal operating condition
    Description XENON HEADLAMP • The brightness and color of the light may vary slightly immediately after turning the headlamp ON. This condition will remain until the xenon bulb becomes stable. T ...

    Both side headlamps (LO) are not turned on
    Description The headlamps (both sides) do not turn ON in any lighting switch setting. Diagnosis Procedure 1.CHECK COMBINATION SWITCH Check the combination switch. Refer to BCS-10, "System De ...

    Other materials:

    Microphone signal circuit (sedan)
    Description Voice signals are transmitted from the microphone to the Bluetooth control unit using the microphone signal circuits. Diagnosis Procedure 1.CHECK HARNESS BETWEEN BLUETOOTH CONTROL UNIT AND MICROPHONE 1. Turn ignition switch OFF. 2. Disconnect Bluetooth control unit connector an ...

    Ignition coil
    Exploded View 1. Ignition coil 2. Spark plug 3. Rocker cover (RH) 4. Rocker cover (LH) Removal and Installation LH REMOVAL 1. Remove engine room cover. 2. Disconnect ignition coil connector. 3. Remove the ignition coil. CAUTION: Never shock ignition coil. INSTALLATION Installatio ...

    BCM branch line circuit
    Diagnosis Procedure INSPECTION PROCEDURE 1.CHECK CONNECTOR 1. Turn the ignition switch OFF. 2. Disconnect the battery cable from the negative terminal. 3. Check the terminals and connectors of the BCM for damage, bend and loose connection (unit side and connector side). Is the inspec ...