Function of Detecting Ignition Relay Malfunction

WARNING: This page is about a different car, the 2004 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.

When the integrated ignition relay is stuck in a "closed contact" position and cannot be turned OFF, IPDM E/R turns ON tail and parking lamps for 10 minutes to indicate IPDM E/R malfunction.

When the state of the integrated ignition relay does not agree with the state of the ignition switch signal received via CAN communication, the IPDM E/R activates the tail lamp relay.

CAN COMMUNICATION SYSTEM DESCRIPTION

Ignition switch signal	Ignition relay status	Tail lamp relay
ON	ON	-
OFF	OFF	-
ON	OFF	-
OFF	ON	ON (10 minutes)

NOTE: When the ignition switch is turned ON, the tail lamps are OFF.