Driver Door Ajar (140)

The LH Front Door Module (LFDM) supplies ignition voltage to the LH front door jamb switch via circuit 745 (BLK/WHT). The LFDM monitors this circuit at connector C2 terminal B, if the LH front door is ajar/open the switch closes and circuit 745 (BLK/WHT) is grounded via circuit 351 (BLK/WHT). The LFDM detects this ground condition and sends a class 2 serial data message to the IPC requesting that this message is displayed. If the vehicle speed is greater than 4.8 km/h (3 mph) the IPC displays the message and request the radio via a class 2 message to activate a multiple medium chime.