P0C62
DTC P0A45, P0A46, P0C57, P0C58, P0C61, P0C62, or P1B04
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 P0A45
- Drive Motor 2 Position Sensor Circuit
DTC P0A46
- Drive Motor 2 Position Sensor Performance
DTC P0C57
- Drive Motor 2 Position Sensor Circuit 1 Low Voltage
DTC P0C58
- Drive Motor 2 Position Sensor Circuit 1 High Voltage
DTC P0C61
- Drive Motor 2 Position Sensor Circuit 2 Low Voltage
DTC P0C62
- Drive Motor 2 Position Sensor Circuit 2 High Voltage
DTC P1B04
- Drive Motor 2 Position Sensor Circuit Loss of Tracking
Diagnostic Fault Information
Circuit/System Description
The drive motor generator position sensor is monitored by the motor control module. The motor control module monitors the angular position, speed and direction of the drive motor generator rotor based upon the signals of the resolver-type position sensor. The position sensor contains a drive coil, two driven coils and an irregular shaped metallic rotor. The metallic rotor is mechanically attached to the shaft of the drive motor generator. At ignition ON, the motor control module outputs a 7 volt ac, 10 kHz excitation signal to the drive coil. The drive coil excitation signal creates a magnetic field surrounding the two driven coils and the irregular shaped rotor. The motor control module then monitors the two driven coil circuits for a return signal. The position of the irregular metallic rotor causes the magnetically-induced return signals of the driven coils to vary in size and shape. A comparison of the two driven coils signals allows the motor control module to determine the exact position, speed and direction of the drive motor generator rotor. The position sensor is a non-serviceable part of the drive motor generator.
Conditions for Running the DTC
The ignition is ON.
P0A45
The system voltage is 9-18 V
Conditions for Setting the DTC
P0C57 or P0C61
Circuit voltage less than 0.5 V.
P0C58 or P0C62
Circuit voltage greater than 3.0 V.
P0A45
The motor control module cannot determine the motor position based upon the sensor signals.
P0A46
The motor control module detects a degraded motor position sensor signal.
P1B04
The motor control module cannot track the motor position based upon the sensor signals.
Action Taken When the DTC Sets
* DTCs P0A45, P0A46, P0C57, P0C58, P0C61, P0C62, and P1B04 are Type A DTCs.
* The hybrid powertrain control module commands the battery energy control module to open the high voltage contactor relays.
Conditions for Clearing the DTC
DTCs P0A45, P0A46, P0C57, P0C58, P0C61, P0C62, and P1B04 are Type A DTCs.
Diagnostic Aids
* The drive motor generator position sensor circuits operate at very low current. Extreme care must be taken when probing terminals and manipulating harnesses.
* The sensor circuit loops are a twisted pair with each pair covered in a foil shield. The shield circuits outside of the transmission are grounded to a stud on the drive motor generator power inverter module assembly.
* The drive motor generator position sensor harness circuits are shielded. Improperly grounded shield circuits may cause inaccurate sensor signals.
Reference Information
Schematic Reference
Hybrid Controls Schematics Hybrid Controls Schematics
Connector End View Reference
* Component Connector End Views Connector End Views By Name
* Inline Harness Connector End Views X101
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 Control Module References for scan tool information
Special Tools
DT-48493 - Jumper Harness
For equivalent regional tools, refer to Special Tools Tools and Equipment.
Circuit/System Testing
Note: You must perform the Component Testing before proceeding with Circuit/System Testing.
1. Ignition OFF, disconnect the X176 harness connector at the transmission.
2. Install the DT-48493 - jumper harnessto the vehicle harness side only.
3. Ignition ON, test for 0.8-1.4 V between the terminals listed below and ground:
* Terminal 17
* Terminal 18
* Terminal 20
* Terminal 21
• If not within the specified range, test the signal circuit for a short to voltage, short to ground, or an open/high resistance. If the circuit tests normal replace the T6 power inverter module.
4. Ignition ON, test for 6.5-7.5 V between the terminals listed below and ground:
* Terminal 15
* Terminal 16
• If not within the specified range, test the signal circuits for a short to voltage, short to ground or an open/high resistance. If the circuits test normal replace the T6 power inverter module.
Component Testing
Note: You must perform the Component Testing before proceeding with Circuit/System Testing.
1. Verify that DTCs P1AF0, P1AF2, P1B43, P1B44, P1B0B, or P1B0C is not set.
• If DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.
2. Ignition OFF, disconnect the X176 harness connector at the transmission.
3. Install the DT-48493 - jumper harnessto the transmission side only.
4. Test for 7.0-9.0 ohms between the AC terminal 15 and the AC terminal 16.
• If not within the specified range, test the transmission control wiring harness extension harness circuits for a short to voltage, short to ground, or an open/high resistance. If the circuits test normal replace the M15A drive motor with generator assembly.
5. Test for 20-23 ohms between the signal terminal 20 and the signal terminal 21.
• If not within the specified range, test the transmission control wiring harness extension harness circuits for a short to voltage, short to ground, or an open/high resistance. If the circuits test normal replace the M15A drive motor with generator assembly.
6. Test for 23-26 ohms between the signal terminal 17 and the signal terminal 18.
• If not within the specified range, test the transmission control wiring harness extension harness circuits for a short to voltage, short to ground, or an open/high resistance. If the circuits test normal replace the M15A drive motor with generator assembly.
7. Test for greater than 10,000 ohms between the terminals listed below and ground:
* Terminal 15
* Terminal 16
* Terminal 17
* Terminal 18
* Terminal 20
* Terminal 21
• If less than the specified value, test the transmission control wiring harness extension harness circuit for a short to ground. If the circuit tests normal replace the M15B drive motor with generator assembly.
8. Test for infinite resistance between the terminals listed below:
* Terminals 15 and 17
* Terminals 15 and 20
* Terminals 17 and 20
• If less than the specified value, test the transmission control wiring harness extension harness circuits for a short between the circuits. If the circuits test normal replace the M15B drive motor with generator assembly.
9. If the test passed refer to Circuit/System Testing.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Drive Motor with Generator Assembly Removal - 2nd Position Drive Motor with Generator Assembly Removal - 2nd Position
* Transmission Control Wiring Harness Extension Harness Removal Transmission Control Wiring Harness Extension Harness Removal
* Control Module References Control Module References for Drive Motor Generator Power Inverter Module Assembly replacement, setup and programming.