Function of Detecting Ignition Relay Malfunction

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

IGNITION SWITCH SIGNAL CHART

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.