P0C2F

DTC P0C2F

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 Descriptor
DTC P0C2F
- Control Module Drive Motor Speed - Engine Speed Correlation

Circuit/System Description

The drive motor generator power inverter module contains two motor control modules. Each motor control module controls and monitors its respective drive motor generator based upon commands from the hybrid powertrain control module. In order for the hybrid powertrain control module to monitor the internal combustion engine speed, motor control module 1 is electrically connected to the crankshaft position sensor signal and reference circuits. The motor control module 1 engine speed information is broadcast to the hybrid powertrain control module over an internal drive motor generator power inverter module communication circuit. Additionally, the hybrid powertrain control module receives engine speed over serial data that is broadcast by the engine control module (ECM) and is based upon the ECM connection to the crankshaft position sensor.

A drive motor generator position sensor is monitored by each motor control module. Each motor control module monitors the angular position, speed and direction of its respective drive motor generator based upon the signals of the resolver-type position sensor.

The hybrid powertrain control module mathematically calculates what engine speed should be based upon the current transmission ratio and the drive motor generator speeds indicated by the drive motor generator position sensors.

The hybrid powertrain control module compares this mathematically calculated engine speed to the sensor-derived serial data ECM engine speed signal and motor control module signal engine speed. If the drive motor generator position sensor speeds are correct, the mathematical equation should accurately calculate engine speed. If the mathematical calculation for engine speed does not match the sensor-derived engine speed, a drive motor position speed sensor error is assumed and this DTC will set.

Conditions for Running the DTC

Condition 1
* The ignition is ON.
* Ignition voltage is greater than 6 volts.
* ECM or motor control module 1 crankshaft position sensor engine speed is less than 1500 RPM.

Condition 2
* The ignition is ON.
* Ignition voltage is greater than 6 volts.
* ECM or motor control module 1 crankshaft position sensor engine speed is greater than 1500 RPM.

Conditions for Setting the DTC

Condition 1

The difference between ECM or motor control module 1 crankshaft position sensor engine speed and hybrid powertrain control module calculated engine speed is greater than 1499 RPM for 1 second.

Condition 2

The difference between ECM or motor control module 1 crankshaft position sensor engine speed and hybrid powertrain control module calculated engine speed is greater than 249 RPM for 1 second.

Action Taken When the DTC Sets

* DTC P0C2F is a Type A DTC.
* The hybrid powertrain control module commands the battery energy control module to open the high voltage contactor relays.

Conditions for Clearing the DTC

* DTC P0C2F is a Type A DTC.
* ECM or motor control module 1 crankshaft position sensor engine speed is greater than 500 RPM and the difference from hybrid powertrain control module calculated engine speed is less than 151 RPM.

Diagnostic Aids

Any condition that allows the engine or drive motor speed sensors to indicate their actual speed incorrectly may cause this DTC to set.

Reference Information
DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification

1. Verify the engine is not seized or binding.

• If the engine is seized or binding, refer to Symptoms - Engine Mechanical Symptoms - Engine Mechanical.

2. Verify that DTC P0335 or P0336 is not set.

• If the DTC P0335 or P0336 is set, Refer to DTC P0335 P0335 or DTC P0336 P0336.

3. If the DTC is set, program the T6 drive motor generator power inverter module. If the DTC resets, Refer to DTC P0A3F, P0A40, P0C52, P0C53, P0C5C, P0C5D, or P1B03 P0A3F.

Repair Instructions

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

Control Module References Control Module References for Drive Motor Generator Power Inverter Module replacement, setup, and programming