Diesel Data: Automotive Repair

P0CF6




DTC P0CF4-P0CF6

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 P0CF4
- Control Pilot Circuit Performance

DTC P0CF5
- Control Pilot Circuit Low Voltage

DTC P0CF6
- Control Pilot Circuit High Voltage

Circuit/System Description

The hybrid powertrain control module 2 monitors a pilot signal from the electronic vehicle supply equipment. The hybrid powertrain control module 2 utilizes this signal to manage the charging process between the electronic vehicle supply equipment and the hybrid powertrain control module 2.

Under normal charging conditions the control pilot signal is generated by the electronic vehicle supply equipment. This diagnostic runs with the cord set disconnected to verify the vehicle side circuit integrity. The diagnostic signal is generated internally by the hybrid powertrain control module 2.

Conditions for Running the DTC

DTC P0CF4
* The vehicle 12 V battery system voltage needs to be above 9 V.
* No charge port door DTCs are set.
* The cord set is disconnected and the charge port door is closed.
* The vehicle needs go from ignition OFF to ignition ON to start the diagnostics.
* Ignition ON
* OR (can set from either condition, but need to pass both conditions)
* The vehicle needs to be driven above 25 km/h (16 mph) for more than 10 seconds.

DTC P0CF5
* The vehicle 12 V battery system voltage needs to be above 9 V.
* The cord set is disconnected and the charge port door is closed.
* Vehicle needs to be driven above 25 km/h (16 mph) for more than 10 seconds.

DTC P0CF6
* The vehicle 12 V battery system voltage needs to be above 9 V.
* The cord set is disconnected and the charge port door is closed.
* Ignition ON.

Conditions for Setting the DTC

DTC P0CF4

The control pilot circuit is not meeting its internal range requirements for 1 second. This can only be set internal to the hybrid powertrain control module 2. This is an internal circuit voltage in the hybrid powertrain control module 2 and can not be measured.

DTC P0CF5

The control pilot circuit voltage divided by the system voltage is less than 0.03 for 1 second. This is an internal circuit voltage in the hybrid powertrain control module 2 and can not be measured.

DTC P0CF6

The control pilot circuit voltage divided by the system voltage is greater than 0.58 for 1 second. This is an internal circuit voltage in the hybrid powertrain control module 2 and can not be measured.

Action Taken When the DTC Sets

* DTC P0CF4-P0CF6 are type A DTCs
* Disables high voltage battery charging.

Conditions for Clearing the DTC

DTC P0CF4-P0CF6 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 Verification

Verify that charge port door DTC P0CC6, P0CC7, P0CC9, P0CCA, P0CCC, P0CCE, P0CCF, or P0CD1 is not set.

If any of the DTCs is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.

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 charger cord set from vehicle charge receptacle and close the charge port door.
3. Disconnect the X2 harness connector at the K114B hybrid powertrain control module 2.
4. Ignition ON, test for less than 1.0 V between the signal circuit terminal 8 X2 and ground.

If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K114B hybrid powertrain control module 2.

5. Test for greater than 100 ohm between the signal circuit terminal 8 X2 and ground.

If less than the specified range, test the signal circuit for a short to ground. If the circuit tests normal, replace the K114B hybrid powertrain control module 2.

6. Test for less than 10 ohm between the signal circuit terminal 8 X2 K114B hybrid powertrain control module 2 and terminal B X98 hybrid battery charger receptacle.

If greater than the specified range, test the signal circuit for an open/high resistance.

7. If all circuits test normal, replace the K114B hybrid powertrain control module 2.

Repair Instructions

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

Control Module References Control Module References for hybrid powertrain control module 2 replacement, programming and setup