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P0D2B




DTC P0D2B or P0D2C

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 Descriptors
DTC P0D2B
- Control Pilot Indicator Control Circuit

DTC P0D2C
- Charge Status Indicator Control Circuit

Diagnostic Fault Information






Circuit/System Description

The status of charging events (including delays) is communicated to the user through a charge status indicator and audio tones. The battery state of charge indicator, located on the top middle of the instrument panel, will be solid lit green when the vehicle is charging under automatic control. It will have a fast flash green if the charging is delayed and will begin later. It will have a slow flash green when charging is complete. A solid lit yellow indicator means the vehicle is not able to accept a charge. And if there is no indicator lit it means the electronic vehicle supply equipment is not working properly or connected.

Conditions for Running the DTC

Both conditions need to run for diagnostic to pass.

Condition 1
* The vehicle 12 V battery system voltage needs to be above 9 V.
* Vehicle in Service Mode.
* The drive motor battery charger cable is disconnected (LEDs commanded OFF).

Condition 2
* The vehicle 12 V battery system voltage needs to be above 9 V.
* Vehicle in Service Mode.
* The vehicle is connected to an AC supply and the battery charger is charging the vehicle (LEDs commanded ON).

Conditions for Setting the DTC

* LED Commanded OFF, The hybrid/EV powertrain control module 2 detects a short to battery for about 4 seconds.
* LED Commanded ON, The hybrid/EV powertrain control module 2 detects a short to ground or an open/high resistance for about 4 seconds.

Action Taken When the DTC Sets

DTC P0D2B and P0D2C are type B DTCs.

Conditions for Clearing the DTC

DTC P0D2B and P0D2C are type B DTCs.

Reference Information
Schematic Reference

Plug-In Charging Schematics Plug-In Charging Schematics
Connector End View Reference

Component Connector End Views Hybrid/EV Battery Pack X1
Description and Operation

Plug-In Charging System Description and Operation Description and Operation
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

For equivalent regional tools, refer to Special Tools Tools and Equipment.

Circuit/System Testing

Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.


The High Voltage Disabling procedure will perform the following tasks:


* Identify how to disable high voltage.

* Identify how to test for the presence of high voltage.

* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.


Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:


* Safety glasses with appropriate side shields when within 15 meters (50 feet) of the vehicle, either indoors or outdoors.

* Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.


- Visually and functionally inspect the gloves before use.

- Wear the Insulation gloves with leather protectors at all times when working with the high voltage battery assembly, whether the system is energized or not.


Failure to follow the procedures exactly as written may result in serious injury or death.


Danger: The Volt Battery Pack will utilize an exchange program. Please consult the most recent revision of bulletin/PI #PIP4841, available in Service Information (SI), for a list of approved Volt Battery Pack service procedures. Components that may be removed and serviced without exchanging the complete battery pack are identified in the bulletin/PI. Please contact the GM Technical Assistance Center (1-877-446-8227) if you have any questions.


1. Vehicle OFF, disconnect the harness connector at the P36 battery state of charge indicator.
2. Test for less than 10 ohm between the low reference terminal C and ground.

• If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K114B hybrid/EV powertrain control module 2.

3. Disconnect the drive motor battery charger cable for at least 10 seconds. Connect a test lamp between the signal terminal A and ground. Verify test lamp does not illuminate.

• If the test lamp does illuminate, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K114B hybrid/EV powertrain control module 2.

4. While Connecting the drive motor battery charger cable verify that the test lamp illuminates in the first 5 seconds of connecting the drive motor battery charger cable

• If the test lamp does not illuminate, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K114B hybrid/EV powertrain control module 2.

5. Disconnect the drive motor battery charger cable for at least 10 seconds. Connect a test lamp between the signal terminal B and ground. Verify test lamp does not illuminate.

• If the test lamp does illuminate, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K114B hybrid/EV powertrain control module 2.

6. While Connecting the drive motor battery charger cable verify that the test lamp illuminates within 25 seconds of connecting the drive motor battery charger cable.

• If the test lamp does not illuminate, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K114B hybrid/EV powertrain control module 2.

7. If all circuits test normal, replace the P36 battery state of charge indicator.

Repair Instructions

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

* Battery Charge Indicator Replacement Service and Repair
* Control Module References Programming and Relearning for battery charger control module replacement, programming and setup

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