Left Rear Door Ajar - 142

The Left Rear Door Module (LRDM) supplies ignition voltage to the left rear door jamb switch via circuit 747 (LT BLU/BLK). The LDRM monitors this circuit at connector C2 terminal B. If the left rear door is ajar/open, the switch closes and circuit 747 (LT BLU/BLK) is grounded via circuit 551 (BLK/WHT). The LRDM detects this ground condition and sends a door ajar/open status (serial data) message via the Simple Data Interface (SBI) to the LFDM. The LFDM detects this door open/ajar message 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 requests the radio via a class 2 message to activate a multiple medium chime.