Nissan Altima 2007-2012 Service Manual: Malfunction indicator lamp

Description

The Malfunction Indicator Lamp (MIL) is located on the combination meter.

The MIL will illuminate when the ignition switch is turned ON without the engine running. This is a bulb check.

When the engine is started, the MIL should turn off. If the MIL remains illuminated, the on board diagnostic system has detected an engine system malfunction.

For details, refer to EC-1142, "Diagnosis Description".

Component Function Check

1.CHECK MIL FUNCTION

1. Turn ignition switch ON.

2. Check that MIL illuminates.

Is the inspection result normal? YES >> INSPECTION END

NO >> Go to EC-1496, "Diagnosis Procedure".

Diagnosis Procedure

1.CHECK DTC

Check that DTC UXXXX is not displayed.

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

NO >> Perform trouble diagnosis for DTC UXXXX. Refer to EC-1179, "Description".

2.CHECK COMBINATION METER FUNCTION

Refer to MWI-95, "DTC Index".

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

NO >> Repair or replace.

3.CHECK INTERMITTENT INCIDENT

Refer to GI-42, "Intermittent Incident".

Is the inspection result normal? YES >> Replace combination meter.

NO >> Repair or replace.

    Ignition signal
    Description The ignition signal from the ECM is sent to and amplified by the power transistor. The power transistor turns ON and OFF the ignition coil primary circuit. This ON/OFF operation induce ...

    On board refueling vapor recovery (ORVR)
    Description From the beginning of refueling, the air and vapor inside the fuel tank go via the refueling EVAP vapor cut valve and EVAP/ORVR line to the EVAP canister. The vapor is absorbed by th ...

    Other materials:

    Diagnosis system (TCM)
    CONSULT-III Function (TRANSMISSION) CONSULT-III can display each diagnostic item using the diagnostic test modes shown below. FUNCTION WORK SUPPORT MODE Display Item List Engine Brake Adjustment CAUTION: Mode of “+1”“0”“−1”“−2”“OFF” can be selected by ...

    P0127 IAT sensor
    Description The intake air temperature sensor is built-into the mass air flow sensor (1). The sensor detects intake air temperature and transmits a signal to the ECM. The temperature sensing unit uses a thermistor which is sensitive to the change in temperature. Electrical resistance of the ...

    Intelligent key system/engine start function
    System Diagram System Description INPUT/OUTPUT SIGNAL CHART SYSTEM DESCRIPTION • The engine start function of Intelligent Key system is a system that makes it possible to start and stop the engine without removing the key. It verifies the electronic ID using two-way communications w ...