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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/EV powertrain control module 2 monitors a pilot signal from the drive motor battery charger cable. The hybrid/EV powertrain control module 2 utilizes this signal to manage the charging process between the drive motor battery charger cable and the hybrid/EV powertrain control module 2.

Under normal charging conditions the control pilot signal is generated by the drive motor battery charger cable. This diagnostic runs with the drive motor battery charger cable disconnected to verify the vehicle side circuit integrity. The diagnostic signal is generated internally by the hybrid/EV powertrain control module 2.

Conditions for Running the DTC

DTC P0CF4
* The vehicle 12 V battery system voltage needs to be above 9 V.
* The drive motor battery charger cable is disconnected and the charge port door is closed.
* Vehicle in Service Mode
* 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 drive motor battery charger cable 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 drive motor battery charger cable is disconnected and the charge port door is closed.
* Vehicle in Service Mode.
* Vehicle needs to be driven above 25 km/h (16 mph) for more than 10 seconds.

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/EV powertrain control module 2. This is an internal circuit voltage in the hybrid/EV 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/EV 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/EV 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
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.


1. Vehicle OFF, disable the high voltage at the T18 battery charger. Refer to High Voltage Disabling High Voltage Disabling. Disconnect the X3 harness connector at the T18 battery charger, the X2 harness connector at the K114B hybrid/EV powertrain control module 2, and the X98 hybrid/EV battery charger receptacle harness connector.
2. Test for infinite resistance between control pilot signal 1 circuit terminal B of the X98 hybrid/EV battery charger receptacle harness connector and the terminals listed below:

* X98 hybrid battery charger receptacle harness connector terminal A
* X98 hybrid battery charger receptacle harness connector terminal C
* X98 hybrid battery charger receptacle harness connector terminal D
* X98 hybrid battery charger receptacle harness connector terminal E

• If less than the specified value, repair the control pilot signal 1 circuit for a short between the circuits.

3. Test for infinite resistance between control pilot signal 1 circuit terminal B of the X98 hybrid/EV battery charger receptacle pigtail and the terminals listed below:

* X98 hybrid battery charger receptacle terminal A
* X98 hybrid battery charger receptacle terminal C
* X98 hybrid battery charger receptacle terminal D
* X98 hybrid battery charger receptacle terminal E

• If less than the specified value, replace the X98 hybrid/EV battery charger receptacle.

4. If all circuits test normal, replace the K114B hybrid/EV powertrain control module 2.

Repair Instructions

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

Drive Motor Battery Charger Receptacle Replacement Drive Motor Battery Charger Receptacle Replacement for hybrid/EV battery charger receptacle replacement

Control Module References Programming and Relearning for hybrid/EV powertrain control module 2 replacement, programming and setup

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