P0D20
DTC P0D20 or P0D22
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 P0D20
- Battery Charger Output Voltage Performance
DTC P0D22
- Battery Charger Output Current Performance
Circuit/System Description
The hybrid powertrain control module 2 monitors the battery charger high voltage output voltage and current and ensures they are within the proper range. The battery charger operates in either a constant current mode or a constant voltage mode. Whichever mode you are in will determine which diagnostic will be ran. The battery charger runs constant voltage mode at the beginning and end of the charge cycle and runs constant current mode most of the charging cycle.
Conditions for Running the DTC
P0D20
* The vehicle 12 V battery system voltage needs to be above 9 V.
* Battery charger is charging and in constant voltage mode
* Above about TBD % hybrid battery pack state of charge the battery charger will go into constant voltage mode. This is the scan tool hybrid battery pack state of charge parameter.
P0D22
* The vehicle 12 V battery system voltage needs to be above 9 V.
* Battery charger is charging and in constant current mode
* Below about TBD % hybrid battery pack state of charge the battery charger will go into constant current mode. This is the scan tool hybrid battery pack state of charge parameter.
* The hybrid powertrain control module 2 measures a current output of less than about 0.5 A
Conditions for Setting the DTC
P0D20
The hybrid powertrain control module 2 measures that the battery charging bus voltage is not within about 10% of the commanded voltage for about 10 seconds.
P0D22
The hybrid powertrain control module 2 measures that the battery charging bus current is not within an acceptable percentage of the commanded current for about 10 seconds.
Action Taken When the DTC Sets
* DTC P0D20 and P0D22 are type A DTCs.
* Disables the vehicle high voltage battery charging.
Conditions for Clearing the DTC
DTC P0D20 and P0D22 are type A 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 A4
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
Scan Tool Reference
Control Module References Control Module References 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 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 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.
1. Ignition OFF, disable the high voltage. Refer to High Voltage Disabling High Voltage Disabling.
2. Disconnect the X4A connector at the T18 battery charger and at the X3 connector at the A28 Hybrid Battery Disconnect Assembly.
3. Test for greater than 100 ohm between the high voltage circuit terminals listed below and ground:
* High Voltage Output terminal A X4A
* High Voltage Output terminal B X4A
• If less than the specified range, test the high voltage circuit for a short to ground.
4. Test for less than 10 ohm between the high voltage circuit terminals listed below:
* Terminal A X4A, T18 Battery Charger and A X3, A28 Hybrid Battery Disconnect Assembly
* Terminal B X4A, T18 Battery Charger and B X3, A28 Hybrid Battery Disconnect Assembly
• If greater than the specified range, test the high voltage circuit for an open/high resistance.
5. If all circuits tests normal, refer to DTC P0AA1, P0AD9, P0ADD, P0AE2, P0AE4, P0D0A, P0D11, P1EBC-P1EBF, P1EC0, or P1EC3-P1EC5 P0AA1 for hybrid battery contactor diagnostics.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
Control Module References Control Module References for battery charger replacement, programming and setup