Immobilizer, status request

The value displays the status of the park neutral position (PNP) switch. The transmission control module (TCM) receives a signal from the gear selector module (GSM) about which position the gear selector lever is in. If the gear selector lever is in a position other than P or N the engine is prevented form starting by the transmission control module (TCM) activating the park neutral position (PNP) switch relay.

Start permitted.

Start not permitted.