DTC B11DB-87: Battery Monitoring Module "A" - Missing message: Action

NOTE: If DTC B11DB-87 is flagged but a "charge system fault" warning/light is not present on the instrument cluster, then the likelihood is that the battery monitoring system control module is NOT the faulty part. If this DTC is logged, follow the diagnostic steps detailed in the BATTERY, MOUNTING AND CABLES (Battery Diagnosis and Testing) service information BEFORE replacing the battery monitoring system control module

Check the integrity of the battery monitoring system control module connector and rectify as required. Refer to the appropriate system wiring diagrams and check the power supply circuit between the battery positive terminal and the battery monitoring system control module for short circuit to ground, open circuit, high resistance. Repair circuit as required. Clear the DTCs and retest
If fault persists, refer to the appropriate system wiring diagrams and check the LIN bus circuit between the gateway module and the battery monitoring system control module for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuit as required. Clear the DTCs and retest
If the fault persists, install a new battery monitoring system control module as required