Nissan Altima 2007-2012 Service Manual: Turn signal lamp circuit

Description

The BCM monitors inputs from the combination switch to determine when to activate the turn signals. The BCM outputs voltage direction to the left and right turn signals during turn signal operation or both during hazard warning operation. The BCM sends a turn signal indicator request to the combination meter via the CAN communication lines.

The BCM performs the fast flasher operation (fail-safe) if any bulb or harness of the turn signal lamp circuit is open.

NOTE: Turn signal lamp blinks at normal speed when using the hazard warning lamp.

Component Function Check

1.CHECK TURN SIGNAL LAMP

1. Select "FLASHER" of BCM (FLASHER) active test item.

2. With operating the test items, check that the turn signal lamp blinks.

Does the turn signal lamp blink? YES >> Turn signal lamp circuit is normal.

NO >> Refer to EXL-51, "Diagnosis Procedure".

Diagnosis Procedure

1.CHECK TURN SIGNAL LAMP BULB

Check the applicable lamp bulb to be sure the proper bulb standard is in use and the bulb is not open.

Is the bulb OK? YES >> GO TO 2

NO >> Replace the bulb.

2.CHECK TURN SIGNAL LAMP OUTPUT VOLTAGE

1. Turn the ignition switch OFF.

2. Disconnect the front combination lamp connector, the door mirror connector and the rear combination lamp connector.

3. Turn the ignition switch ON.

4. With operating the turn signal switch, check the voltage between the BCM harness connector and the ground.

Is the measurement value normal? YES >> GO TO 3

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

3.CHECK TURN SIGNAL LAMP CIRCUIT FOR OPEN

1. Turn the ignition switch OFF.

2. Disconnect BCM connector.

3. Check the continuity between the BCM harness connector and the front combination lamp, the rear combination lamp harness connector or the door mirror connector (if equipped with turn signals in mirrors).

Does continuity exist? YES >> GO TO 4

NO >> Repair the harnesses or connectors.

4.CHECK TURN SIGNAL LAMP SHORT CIRCUIT

Check continuity between the BCM harness connector and the ground.

Does continuity exist? YES >> Repair the harnesses or connectors.

NO >> GO TO 5

5.CHECK TURN SIGNAL LAMP GROUND CIRCUIT

Check continuity between the front combination lamp, the rear combination lamp or the door mirror and ground (if equipped with turn signals in mirrors).

Does continuity exist? YES >> Replace the front combination lamp or the rear combination lamp.

NO >> Repair the harnesses or connectors.

    Parking lamp circuit
    Description The IPDM E/R (intelligent power distribution module engine room) controls the tail lamp relay based on inputs from the BCM over the CAN communication lines. When the tail lamp relay i ...

    Optical sensor
    Description The optical sensor converts the outside brightness (lux) to voltage and transmits the optical sensor signal to the BCM. Component Function Check 1.CHECK OPTICAL SENSOR SIGNAL BY CONS ...

    Other materials:

    On board diagnostic (OBD) System
    Diagnosis Description INTRODUCTION The ECM has an on board diagnostic system, which detects malfunctions related to engine sensors or actuators. The ECM also records various emission-related diagnostic information including: The above information can be checked using procedures listed in t ...

    On-vehicle repair
    EVAP CANISTER Exploded View 1. EVAP control system pressure sensor 2. EVAP canister 3. O-ring 4. EVAP canister vent control valve 5. O-ring Removal and Installation REMOVAL 1. Lift up the vehicle. 2. Remove EVAP canister fixing bolt. 3. Remove EVAP canister. NOTE: The EVAP canis ...

    B2099 ignition relay off stuck
    Description • IPDM E/R operates the ignition relay when it receives an ignition switch ON signal from BCM via CAN communication. • Turn the ignition relay OFF by pressing the push-button ignition switch once when the vehicle speed is 4 km/ h (2.5 MPH) or less. • Turn the ignition ...