Ram B1500, B2500, B3500, 1999-2003

Malfunction Indicator Light

Print

The Malfunction Indicator Lamp (MIL) is located on the instrument panel. It is displayed as an engine icon (graphic).

The MIL lamp lights up when the ignition key is turned on as a bulb test.

Under other conditions the MIL lamp will be illuminated when the PCM sets a Diagnostic Trouble Code (DTC).

DTCs can be retrieved with a scan tool via the 16-way data link connector. This connector is located on the lower edge of the instrument panel near the steering column. On 1997 models, the DTCs can be retrieved with the ignition key. See "Trouble Codes", following.



Click image to see an enlarged view

Fig. Scan tool connected to 16-way data link connector beneath the instrument panel.

The Malfunction Indicator Lamp (MIL) is located on the instrument panel. The lamp is connected to the control unit and will alert the driver to certain malfunctions detected by the PCM. When the lamp is illuminated, the PCM has detected a fault and stored a DTC in memory.

The light will stay illuminated as long as the fault is present. Should the fault self-correct, the MIL will extinguish but the stored code will remain in memory.

Under normal operating conditions, the MIL should illuminate briefly when the ignition key is turned ON . This is commonly known as a bulb check. As soon as the PCM receives a signal that the engine is cranking, the lamp should extinguish. The lamp should remain extinguished during the normal operating cycle.



Click image to see an enlarged view

Fig. Check engine lamp location

Resetting



Some scan tools have a function to clear trouble codes. However, the problem should be attended to and resolved or the trouble code(s) will simply reappear.

 
label.common.footer.alt.autozoneLogo