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For 1990-2009 cars only
Makes 🢒 Saturn 🢒 2009 🢒 VUE - AWD 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 DTC P0A81-P0A83

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 Descriptors

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

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

B+

P0A82

P0A82

--

--

Fan Control

P0A81, P0A83

P0A81, P0A82

P0A81

--

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.

Reference Information

Schematic Reference

Hybrid Cooling Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Starter Generator Control Module Cooling System Description and Operation

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Special Tools

J 35616 GM Approved Terminal Test Kit

Circuit/System Verification

Ignition ON, using the scan tool special function command the generator battery vent fan ON and OFF several times.

⇒If the generator battery vent fan does not operate as commanded, continue with Circuit/System Testing.

Circuit/System Testing

Warning: 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.

Note: In order to avoid damaging BECM X1 and X2 connector terminals, the proper test probes should be used. The proper test probes are as follows:

    • J-35616-65B for female terminals
    • J-35616-64B for male terminals

P0A81

  1. Ignition OFF, disconnect the generator battery vent fan harness connector. Refer to Hybrid Battery Service Disconnect/Connect.
  2. Disconnect the BECM X2 harness connector.
  3. Test the cooling fan control circuit for an open or high resistance.
    4. ⇒If the circuit tests normal, replace the BECM.
  4. Replace the harness assembly.

P0A82

  1. Ignition ON, with scan tool command the generator battery vent fan ON.
    2. ⇒If the fan operates, replace the BECM.
  2. Ignition OFF, disconnect the generator battery vent fan harness connector. Refer to Hybrid Battery Service Disconnect/Connect.
  3. Disconnect BECM X2 harness connector.
  4. Test for less than 1 ohm between the following circuits listed below.
    5. • BECM X2 connector terminal 2 to fan harness connector terminal 1
    • BECM X2 connector terminal 4 to fan harness connector terminal 2
    • BECM X2 connector terminal 3 to fan harness connector terminal 3
    • BECM X2 connector terminal 11 to fan harness connector terminal 4
    ⇒If greater than the specified range, replace the generator battery vent fan harness assembly.
  5. If all circuits test normal , replace the generator battery vent fan.

P0A83

  1. Ignition OFF, disconnect the generator battery vent fan harness connector. Refer to Hybrid Battery Service Disconnect/Connect.
  2. Disconnect BECM X2 harness connector.
  3. Test the fan control circuit terminal 3 for a short to ground.
    4. ⇒If the circuit tests normal, replace the BECM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Generator Battery Vent Fan Replacement
    •  Control Module References for BECM replacement, setup, and programming