P0A80

DTC P0A80

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category.

DTC Descriptor
DTC P0A80
- Replace Hybrid Battery Pack

Circuit/System Description

The drive motor generator battery control module will diagnose its own systems and determine when a fault condition is present. Diagnostics and system status is communicated from the drive motor generator battery control module to the drive motor generator control module through serial data. The drive motor generator control module is the host controller for diagnostic trouble code (DTC) information.

The drive motor generator battery control module measures the internal hybrid battery resistance across the high voltage battery string and in pairs. If the internal resistance values are out of range at a given battery temperature, this DTC will set. Higher internal resistance will also increase battery temperature.

Conditions for Running the DTC

* The ignition is ON.
* The 12 V battery voltage is 9-18 V.
* Hybrid battery current is -70 to +100 A.
* Hybrid battery temperature is -10 to +50°C (14-22°F).

Conditions for Setting the DTC

One of the following conditions exists for 10 minutes:

* Hybrid battery pack calculated hybrid battery resistance is greater than the value specified in Drive Motor Generator Battery End of Life Resistance ().
* Hybrid battery resistance is greater than the value specified in Drive Motor Generator Battery End of Life Resistance ().

Action Taken When the DTC Sets

* DTC P0A80 is a type A DTC.
* Hybrid battery power is reduced to 0 Kw.
* The battery cooling fan turns ON high speed.
* The driver information center (DIC) displays the SERVICE HYBRID SYSTEM message.

Conditions for Clearing the DTC

DTC P0A80 is a type A DTC.

Reference Information
Schematic Reference

Hybrid Energy Storage Schematics ()
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Drive Motor Battery System Description ()
Electrical Information Reference

* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Powertrain Diagnostic Trouble Code (DTC) Type Definitions)
Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information
Special Tools

EL-48900 HEV Safety Kit

Circuit/System Verification

Ignition ON, observe the scan tool BECM Hybrid Batt. Pack Resistance parameter. The reading should be less than the resistance values specified in Drive Motor Generator Battery End of Life Resistance ().

If greater than the specified range, replace the drive motor battery assembly.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the repair.

Drive Motor Generator Battery Replacement and Shipping Preparation ()