P0A81

DTC P0A81-P0A83

DTC Descriptor

DTC P0A81
- Hybrid Battery Pack Cooling Fan Control Circuit

DTC P0A82
- Hybrid Battery Pack Cooling Fan Stuck Off

DTC P0A83
- Hybrid Battery Pack Cooling Fan Stuck On

Diagnostic Fault Information

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview

Circuit/System Description

The battery energy control module (BECM) monitors to detect if the cooling fan is enabled, in the stuck off position or in the stuck on condition. If a failure is detected, the appropriate DTC will set.

Conditions for Running the DTC

The engine is running.

Conditions for Setting the DTC

P0A81
* Enable flag is enabled.
* Fan state is OFF.

P0A82
* Fan speed feedback is less than 5 percent.
* Fan state is ON.

P0A83
* Fan speed feedback is greater than 5 percent.
* Fan state is OFF.

Action Taken When the DTC Sets

The hybrid system is disabled.

Conditions for Clearing the DTC

P0A81

The fan is not enabled.

P0A82, P0A83

The fan speed feedback is normal.

Circuit/System Verification

Caution: To help avoid personal injury, be careful when working in the vicinity of the generator battery disconnect control module. Internal components will still be live, 36V potential, even when the cover has been opened or removed.

P0A81, P0A82, P0A83
1. If DTC is history, refer to Testing for Intermittent Conditions and Poor Connections in Diagnostic Aids. Component Tests and General Diagnostics
2. If DTC is current, replace the BECM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

Control Module References for BECM replacement, setup, and programming.