Normal Operation and Fault Conditions
The BECMB provides battery voltage to the RCM and, if equipped, PAD indicator (vehicles without center stack display only). The BECMB compares HS-CAN1 messages to ignition voltage inputs. If the status of the HS-CAN1 message and the voltage input do not match, the BECMB sets a DTC.
If a fault is detected, the BECMB stores the appropriate DTC in memory and sends a message to the RCM over HS-CAN1 and HS-CAN2, indicating that a BECMB fault is present. Upon receipt of this message, the RCM sets DTC U0413:92 and sends a message to the IPC to illuminate the airbag warning indicator.
PPT BI BECMB DTC FAULT TRIGGER CONDITIONS
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| B1142:62 | Ignition Status 1: Signal Compare Failure | Sets when the status of the hard-wired ignition input to the BECMB does not match the ignition status reported from the HS-CAN1 |
| B13BF:12 | Run/Start Input: Circuit Short to Battery | Sets when the hardwired ignition input to the BECMB is inactive, but the BECMB receives an ignition status from the HS-CAN1 that contradicts the hardwired input status. |