2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2559

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2559

A high side driver in the ECM applies a voltage to the voltage regulator. This signals the voltage regulator to turn the field circuit ON and OFF.

The ECM monitors the state of the charge indicator control circuit.

Conditions for Running the DTC

* The engine is running.

* No generator, CKP sensors, CMP sensor DTCs are set.

Conditions for Setting the DTC

The charge indicator control circuit is shorted to ground or shorted to voltage for 20 seconds.

Action Taken When the DTC Sets

* The charge indicator turns ON.

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

Conditions for Clearing the DTC

* The DTC will pass when the condition for setting the DTC is no longer present for 2 seconds.

* A history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.

* The charge indicator and DIC message will remain ON until the DTC passes or is cleared, even if the ignition is cycled.

Reference Information

Schematic Reference

Starting and Charging Schematics (See: Starting and Charging/Diagrams/Electrical Diagrams)

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 Testing

1. Verify that a test lamp illuminates between the G13 generator B+ terminal 1 X2 and ground.

瀚慖f the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

2. Ignition OFF, disconnect the X1 harness connector at the generator.

3. Ignition ON, test for 4.5-5.5 V between the control circuit terminal 1 and ground.

瀚慖f greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the ECM.

瀚慖f less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the ECM.

4. If all circuits test normal, test or replace the generator.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Generator Replacement (See: Starting and Charging/Charging System/Alternator/Service and Repair/Generator Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming