2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 467
Circuit/System Description
The body control module (BCM) has 2 circuits for monitoring vehicle 12V system voltage. The BCM B+ is supplied to terminal 3 X3 by the BCM
fuse, and the high resolution B+ is supplied to the BCM terminal 10 X4 by the IPC fuse. The BCM monitors the system voltage on both circuits to
ensure that the voltage stays within the proper range. Damage to components, and incorrect data may occur when the voltage is out of range. If the
BCM detects the system voltage on the high resolution B+ circuit is outside the normal range, DTC B1517 will set.
Conditions for Running the DTC
The BCM is awake.
Conditions for Setting the DTC
B1517 03
The voltage of the high resolution B+ circuit is less than 11 volts for 2 minutes.
B1517 07
The voltage of the high resolution B+ circuit is greater than 16 volts for 15 seconds.
B1517 5A
The voltage of the high resolution B+ circuit is 2 volts less than the voltage of the BCM B+ circuit for 10 seconds.
Action Taken When the DTC Sets
* The instrument panel cluster (IPC) illuminates the charge indicator.
* The driver information center (DIC) displays the SERVICE BATTERY CHARGING SYSTEM message.
Conditions for Clearing the DTC
* The DTC will pass when the battery voltage is in the normal range for 15 seconds.
* A history DTC will clear after 50 consecutive ignition cycles have occurred without a malfunction.
* The charge indicator and DIC message will remain ON until the DTC is cleared.
Diagnostic Aids
* A high or low voltage DTC in multiple modules indicates a concern in the 12V charging system.
* Verify that the ground connections G103 and G201 are clean and tight.
Reference Information
Schematic Reference
* Body Control System Schematics (See: Body and Frame/Body Control Systems/Diagrams/Electrical Diagrams)
* Power Distribution Schematics (See: Diagrams/Electrical Diagrams/Starting and Charging/Power and Ground Distribution/System
Diagram/Power Distribution Schematics)
* Ground Distribution Schematics (See: Diagrams/Electrical Diagrams/Starting and Charging/Power and Ground Distribution/System
Diagram/Ground Distribution Schematics)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Charging System Description and Operation (See: Starting and Charging/Charging System/Description and Operation)
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
