P0C05
DTC P0C05
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 P0C05
-
Drive Motor Phase U-V-W Circuits
Circuit/System Description
The generator control module also called the starter generator control module is comprised of the following three control modules; the hybrid powertrain control module, 14 volt power module and the drive motor control module. These three control modules are non serviceable and are part of the generator control module.
The drive motor control module operates the starter generator, also referred to as the drive motor. The drive motor control module controls the speed and output torque of the starter generator through the sequencing actuation of high current switching transistors called insulated gate bipolar transistors. Each insulated gate bipolar transistor assembly is monitored for overcurrent conditions.
Conditions for Running the DTC
* The ignition is ON.
* The high voltage input to the generator control module is above 50 volts.
* DTCs P0BE6, POBE7, POBE8, P0BEE, POBEF, P0BF0, or P0BFD are not set.
* The drive motor control module has applied greater than or equal to 25A to the drive motor.
Conditions for Setting the DTC
The drive motor control module detects at least one U-V-W phase current values is less than 9A.
Action Taken When the DTC Sets
* DTC P0C05 is a Type B DTC.
* The starter generator regeneration and power assist functions are disabled.
Conditions for Clearing the DTC
DTC P0C05 is a Type B DTC.
Diagnostic Aids
The 14v power module remains active.
Reference Information
Schematic Reference
* Hybrid Controls Schematics Hybrid Controls Schematics
* Hybrid Energy Storage Schematics [1][2]Electrical Diagrams
Description and Operation
* Starter Generator Description and Operation Starter Generator Description and Operation
* Generator Control Module Description and Operation Generator Control Module Description and Operation
* Hybrid Modes of Operation Description Hybrid Modes of Operation Description
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
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.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. Perform the High Voltage Disabling High Voltage Disabling procedure.
2. Remove the 3-phase cable assembly from the K59 starter generator control module.
3. Test for less than 0.5 ohms at each phase by measuring between the following circuits at the cable with a DMM:
* Phase U and phase V
* Phase U and phase W
• If not the specified value Inspect the 3-phase drive motor generator battery cable terminal fasteners at the K59 starter generator control module.
• If any fasteners were loose and no arc-flash damage is present, torque the fasteners and re-assembly the vehicle. Retest for the DTC.
• If any fasteners were loose and arc-flash damage is present, replace the K59 starter generator control module assembly and the 3-phase drive motor generator battery cable assembly.
4. Disconnect the 3-phase drive motor generator battery cable assembly from the A15 starter generator.
5. Test each cable for continuity from the starter generator connection terminal to the K59 starter generator control module connection terminal.
• If you measure greater than 0.5 ohms, replace the 3-phase drive motor generator battery cable assembly.
• Replace the A15 starter generator and retest for the DTC. If the DTC resets, replace the K59 starter generator control module.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Starter Generator Replacement Starter Generator Replacement for starter generator replacement.
* Drive Motor Generator Battery Cable Replacement Drive Motor Generator Battery Cable Replacement for 3-Phase Cable Assembly replacement.
* Control Module References Programming and Relearning for Generator Control Module, also called the Starter Generator Control Module, replacement, programming and setup.