For 1990-2009 cars only
Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptor
DTC B1527 00: High Parasitic LoadCircuit/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
Connector End View Reference
Description and Operation
Charging System Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Refer to Battery Electrical Drain/Parasitic Load Test.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
