2010 Cadillac Truck Escalade RWD V8-6.2L Page 1278

2010 Cadillac Truck Escalade RWD V8-6.2L Page 1278

DTC P0B7A

- Hybrid Battery 13 Circuit High Voltage

DTC P0B7F

- Hybrid Battery 14 Circuit High Voltage

DTC P0B84

- Hybrid Battery 15 Circuit High Voltage

DTC P0B89

- Hybrid Battery 16 Circuit High Voltage

DTC P0B8E

- Hybrid Battery 17 Circuit High Voltage

DTC P0B93

- Hybrid Battery 18 Circuit High Voltage

DTC P0B98

- Hybrid Battery 19 Circuit High Voltage

DTC P0B9D

- Hybrid Battery 20 Circuit High Voltage

Circuit/System Description

The system contains twenty battery modules. Each module contains two 7.2 V cells for a total nominal system voltage of 288 V. Each battery

module is rated at 14.4 V direct current (DC) and all the modules are connected together in series. The drive motor generator battery is also referred

to as the hybrid battery. The drive motor generator battery control module is also referred to as the battery energy control module (BECM). The

drive motor generator battery control module monitors the hybrid battery voltage on the twenty battery modules. The drive motor generator battery

control module determines the actual terminal voltage by monitoring the output voltage from the high voltage contactors.

The drive motor generator battery control module will diagnose its own systems and determine when a fault condition is present. Diagnostics and

system status is communicated from the drive motor generator battery control module to the hybrid powertrain control module (HPCM) through

serial data. The hybrid powertrain control module is the host controller for diagnostic trouble code (DTC) information.

Conditions for Running the DTC

* DTC P0A1F is not set.

* The ignition is ON.

* The 12 V battery voltage is 9-18 V.

Conditions for Setting the DTC

Any hybrid battery voltage signal is greater than 23 V for 1.5 seconds.

Action Taken When the DTC Sets

* DTCs P0B3E, P0B43, P0B48, P0B4D, P0B52, P0B57, P0B5C, P0B61, P0B66, P0B6B, P0B70, P0B75, P0B7A, P0B7F, P0B84, P0B89,

P0B8E, P0B93, P0B98, and P0B9D are type B DTCs.

* The drive motor generator battery control module commands the battery vent fan to high speed.

* If more than 4 of these DTCs are set, the drive motor generator battery control module sends a message to the hybrid powertrain control

module to reduce the power use limit to 50 percent.

Conditions for Clearing the DTC

DTCs P0B3E, P0B43, P0B48, P0B4D, P0B52, P0B57, P0B5C, P0B61, P0B66, P0B6B, P0B70, P0B75, P0B7A, P0B7F, P0B84, P0B89, P0B8E,

P0B93, P0B98, and P0B9D are type B DTCs.

Reference Information

Schematic Reference

Hybrid Energy Storage Schematics ()

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit