Friday, July 26, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 405


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.



* The history DTC will clear after 50 consecutive ignition cycles have occurred without a malfunction.



Diagnostic Aids



* A high or low voltage DTC in multiple modules indicates a concern in the charging system. Refer to Charging System Test (See: Starting and



Charging/Testing and Inspection/Component Tests and General Diagnostics/Charging System Test).



* 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



Repairs/Wiring Repairs)



Scan Tool Reference



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



Circuit/System Verification



1. Engine running, accessories OFF, measure and record the battery voltage at the battery terminals. The voltage should be between 12.6 and



15.0 volts.



锟斤拷 If not within the specified range, refer to Charging System Test (See: Starting and Charging/Testing and Inspection/Component Tests and



General Diagnostics/Charging System Test).



2. Observe the scan tool BCM Battery Voltage parameter and the Batt. Voltage High Res. parameter. Both readings should be between 12.60



and 15.00 volts.



Circuit/System Testing



1. Ignition OFF, disconnect the harness connectors at the BCM.



2. Ignition OFF and scan tool disconnected, open and close the drivers door, and wait 1 minute. Test for less than 5 ohms between the following



ground circuit terminals and ground:

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