Ignition Relay Malfunction Detection Function

WARNING: This page is about a different car, the 2011 Nissan Xterra. However, it is still accessible from the selected car via links, so may be relevant.

IPDM E/R monitors the voltage at the contact circuit and excitation coil circuit of the ignition relay inside it.
IPDM E/R judges the ignition relay error if the voltage differs between the contact circuit and the excitation coil circuit.

If the ignition relay cannot turn OFF due to contact seizure, it activates the tail lamp relay for 10 minutes to alert the user to the ignition relay malfunction when the ignition switch is turned OFF.

IGNITION RELAY MALFUNCTION DETECTION FUNCTION CHART

Ignition switch	Ignition relay	Tail lamp relay
ON	ON	-
OFF	OFF	-

NOTE: The tail lamp turns OFF when the ignition switch is turned ON.