* Terminal 5 X3
* Terminal 9 X4
锟斤拷 If 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
锟斤拷 If 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
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
