Function of Detecting Ignition Relay Malfunction

WARNING: This page is about a different car, the 2004 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

When contact point of integrated ignition relay is stuck and cannot be turned OFF, IPDM E/R turns ON tail and parking lamps for 10 minutes to indicate IPDM E/R malfunction.

When a state of ignition relay having built-in does not agree with a state of Ignition switch signal input by a CAN communication from BCM, IPDM E/R lets tail lamp relay operate.

FUNCTION OF DETECTING IGNITION RELAY MALFUNCTION

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 lamp is OFF.