Flash: Battery Pack Control Module (BPCM) Diagnostic and System Updates

Bulletin number

08-132-21

Component

Electrical system

Summary

Flash: Battery Pack Control Module (BPCM) Diagnostic and System Updates This bulletin involves updating the BPCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, the technician may notice one or more of the following DTCs have been set: P0AA1-00 - Hybrid/EV Battery Positive Contactor ?A? Stuck Closed. P0AA4-00 - Hybrid Battery Negative Contactor Circuit Stuck Closed. P0C78-00 - Hybrid/EV Battery System Precharge Time Too Long. P0B3C-00 - Hybrid/EV Battery Voltage Sense 1 Circuit Performance. P0B41-00 - Hybrid/EV Battery Voltage Sense 2 Circuit Performance. P0B46-00 - Hybrid/EV Battery Voltage Sense 3 Circuit Performance. P0B4B-00 - Hybrid/EV Battery Voltage Sense 4 Circuit Performance. P0B50-00 - Hybrid/EV Battery Voltage Sense 5 Circuit Performance. P0B55-00 - Hybrid/EV Battery Voltage Sense 6 Circuit Performance. P1A16-00 - Hybrid/EV Wakeup Control 3 Output Circuit/Open. P1D7B-00 - Hybrid/EV Wakeup Control 3 Output Circuit Short to Battery. P1D7C-00 - Hybrid/EV Wakeup Control 3 Output Circuit Short to Ground. Customer may also experience one or more of the following: Premature oil change message displayed on the cluster and vehicle may be running in fuel/oil refresh mode. Scheduled charging not functioning properly because the battery pack did not wake up while plugged in.

Owners of these vehicles have filed 25 complaints in the electrical category.