P0D23
DTC P0D21 or P0D23
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 P0D21
- Battery Charger Output Voltage Too Low
DTC P0D23
- Battery Charger Output Shorted
Circuit/System Description
The hybrid powertrain control module 2 monitors the battery charger high voltage output voltage and current and ensures there is not a resistive short in the charging bus.
Conditions for Running the DTC
P0D21
* The vehicle 12 V battery system voltage needs to be above 9 V.
* Battery charger in heating mode ONLY:
- Multi-function contactor must be commanded Open.
- Battery charging contactors must be commanded Closed.
- Commanded high voltage current must be greater than 0.5 A.
- High voltage battery heater duty cycle must be greater than 5%.
- Electronic vehicle supply equipment must be connected and vehicle receiving power.
* All other battery charging modes:
- Multi-function contactor and battery charging contactors must be commanded Closed.
- Electronic vehicle supply equipment must be connected and vehicle receiving power.
P0D23
* The vehicle 12 V battery system voltage needs to be above 9 V.
* There can not be any high voltage or current sensor faults present.
* The battery charge system must be in the pre-charge state, and the multi-function contactor must be commanded Open.
* There can not be any high voltage battery heating or cooling requests active.
* Electronic vehicle supply equipment must be connected and vehicle receiving power.
Conditions for Setting the DTC
P0D21
Battery charger high voltage output voltage is less than 150 V for about 1 second.
P0D23
The battery charger high voltage output current exceeds 0.1 A for about 3 seconds.
Action Taken When the DTC Sets
DTC P0D21 and P0D23 are type A DTCs.
P0D21
Disables the high voltage battery heating and/or charging.
P0D23
Disables the high voltage battery charging.
Conditions for Clearing the DTC
DTC P0D21 and P0D23 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 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 greater than 100 ohm between the high voltage circuit terminals A X4A and terminal B X4A.
• If less than the specified range, test the high voltage circuit for a short across the high voltage wires.
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 control module replacement, programming and setup