2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1255

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1255

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.

* Minimum hybrid battery temperature is greater than -7掳C (19.4掳F).

* Hybrid battery discharge current is greater than 0.2 A.

Conditions for Setting the DTC

The drive motor generator battery control module detects greater than a 1.5 V difference between any two hybrid battery voltage measurements for

3 seconds. However, if any DTCs P0B3C-P0B9D are set, the corresponding battery voltage measurement is ignored by this DTC.

Action Taken When the DTC Sets

* DTC P0BBD is a type B DTC.

* The drive motor generator battery control module sends a message to the hybrid powertrain control module to reduce the power use limit to

3000 watts.

* The driver information center (DIC) displays the SERVICE HYBRID SYSTEM message.

Conditions for Clearing the DTC

* DTC P0BBD is a type B DTC.

* The DTC will pass when the voltage of all hybrid batteries are within 1 V of each other.

Reference Information

Schematic Reference

Hybrid Energy Storage Schematics ()

Connector End View Reference

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

Description and Operation

Drive Motor Battery System Description ()

Electrical Information Reference

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

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

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

Repairs/Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Special Tools

* EL-48571 High Voltage Battery Pin Out Box

* EL-48900 HEV Safety Kit

Circuit/System Verification

Ignition ON, observe the scan tool Hybrid Battery 1-20 parameters. Each reading should be between 10-19 V, and all readings should be within 1.5

V of each other.

Circuit/System Testing

Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection.

Personal Protection Equipment (PPE) and proper procedures must be followed.