Nissan Altima Owners Manual: NISSAN vehicle immobilizer system

The NISSAN Vehicle Immobilizer system will not allow the engine to start without the use of the registered key.

If the engine fails to start using a registered key (for example, when interference is caused by another registered key, an automated toll road device or automatic payment device on the key ring), restart the engine using the following procedure:

1. Leave the ignition switch in the ON position for approximately 5 seconds.

2. Place the ignition switch in the OFF or LOCK position, and wait approximately 10 seconds.

3. Repeat steps 1 and 2.

4. Restart the engine while holding the device (which may have caused the interference) separate from the registered key.

If the no start condition re-occurs, NISSAN recommends placing the registered key on a separate key ring to avoid interference from other devices.

    NISSAN Intelligent Key® battery discharge
    If the battery of the NISSAN Intelligent Key® is discharged, or environmental conditions interfere with the Intelligent Key operation, start the engine according to the following procedure: 1. ...

    Before starting the engine
    ● Make sure the area around the vehicle is clear. ● Check fluid levels such as engine oil, coolant, brake fluid, and windshield-washer fluid as frequently as possible, or at least when ...

    Other materials:

    B261a push-button ignition switch
    Description IPDM E/R transmits the push-button ignition switch status via CAN communication to BCM. BCM receives push-button ignition switch status by hardwire input. BCM compares the 2 signals for mismatch. DTC Logic DTC DETECTION LOGIC NOTE: • If DTC B261A is displayed with DTC U1000 ...

    Front tweeter (coupe)
    Description The audio unit sends audio signals to the BOSE speaker amp. The BOSE speaker amp. amplifies the audio signals before sending them to the front tweeters using the audio signal circuits. Diagnosis Procedure 1.HARNESS CHECK 1. Disconnect BOSE speaker amp. connector B122 and suspec ...

    Intake valve timing control
    System Diagram System Description INPUT/OUTPUT SIGNAL CHART *: This signal is sent to the ECM through CAN communication line SYSTEM DESCRIPTION This mechanism hydraulically controls cam phases continuously with the fixed operating angle of the intake valve. The ECM receives signals s ...