2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 488

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 488

ground circuit terminals and ground:

* Terminal 1 X3

* Terminal 5 X3

* Terminal 9 X4

瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.

3. Ignition ON, verify that a test lamp illuminates between the following B+ circuit terminals and ground:

* Terminal 3 X3

* Terminal 10 X4

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

4. If all circuits test normal, replace the BCM.

Repair Instructions

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

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

B1527

DTC B1527

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptor

DTC B1527 00

- High Parasitic Load

Circuit/System Description

The body control module (BCM) monitors the state of charge (SOC) of the electrical system. If the BCM senses that the battery current was less

than -2 amps and the SOC at key-on is 30 percent less than it was when the engine was last running, DTC B1527 00 will set.

Conditions for Running the DTC

The ignition is turned from OFF to ON.

Conditions for Setting the DTC

* The SOC at key-on is 30 percent less than it was when the engine was last running.

* The average battery current was less than -2 amps when the ignition was OFF.

Action Taken When the DTC Sets

No actions are taken.

Conditions for Clearing the DTC

* The DTC will clear when the SOC is greater than or equal to 80 percent.

* A history DTC clears after 50 consecutive ignition cycles that the diagnostic runs and does not fail.

Reference Information

Schematic Reference

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

Connector End View Reference