DTC P0A3F, P0A40, P0C52, P0C53, P0C5C, P0C5D or P1B03
Diagnostic Instructions
DTC Descriptor
DTC P0A3F: Drive Motor 1 Position Sensor Circuit
DTC P0A40: Drive Motor 1 Position Sensor Performance
DTC P0C52: Drive Motor 1 Position Sensor Circuit 1 Low Voltage
DTC P0C53: Drive Motor 1 Position Sensor Circuit 1 High Voltage
DTC P0C5C: Drive Motor 1 Position Sensor Circuit 2 Low Voltage
DTC P0C5D: Drive Motor 1 Position Sensor Circuit 2 High Voltage
DTC P1B03: Drive Motor 1 Position Sensor Circuit Tracking Lost
Diagnostic Fault Information
Circuit
| Short to Ground
| Open/High Resistance
| Short to Voltage
| Signal Performance
|
Drive Motor 1 Position Sensor 1
| P0C52
| P0A3F
| P0C53, P0A3F
| P1B03, P0A40
|
Drive Motor 1 Position Sensor 2
| P0C5C
| P0A3F
| P0C5D, P0A3F
| P1B03, P0A40
|
Drive Motor 1 Position Sensor Excitation
| P0A3F
| P0A3F
| P0A3F
| P1B03, P0A40
|
Circuit/System Description
The drive motor 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 vehicle 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.
Conditions for Running the DTC
The vehicle is ON.
Conditions for Setting the DTC
P0C52, P0C5C
Circuit voltage less than 0.5 V.
P0C53, P0C5D
Circuit voltage greater than 4.5 V.
P0A3F
Sin or Cos signal is less than 2.3 V.
P0A40
Sin or Cos signal is greater than 4 V.
P1B03
The motor control module cannot track the motor position based on the sensor signals.
Action Taken When the DTC Sets
| • | DTCs P0A3F, P0A40, P0C52, P0C53, P0C5C, P0C5D and P1B03 are Type A DTCs. |
| • | The hybrid powertrain control module commands GFI State. The vehicle will continue to run in electric mode if there is sufficient hybrid battery SOC. |
Conditions for Clearing the DTC
DTCs P0A3F, P0A40, P0C52, P0C53, P0C5C, P0C5D and P1B03 are Type A DTCs.
Diagnostic Aids
| • | The drive motor generator position sensor circuits operate at very low current. These circuits are susceptible to moisture intrusion, corrosion and terminal damage. Extreme care must be taken when probing terminals and manipulating harnesses. Poor terminal connections can result in intermittent operation. |
| • | If the customer comments that the problem occurs only during moist environmental conditions: rain, snow, vehicle washing, etc., inspect the sensor wiring for signs of water intrusion. If the DTC is not current, clear all DTCs and simulate the effects of water intrusion by using the following procedure: |
| 1. | Spray the suspected area with a 5 percent saltwater solution. To create a 5 percent saltwater solution, add 2 teaspoons (12 g) of salt to 8 fl oz (237 ml) of water. |
| 2. | Test drive the vehicle at various speeds over various road surfaces such as bumps and turns. |
| 3. | Rinse the area thoroughly when completed. |
| • | The sensor circuit loops are a twisted pair with each pair covered in a foil shield. The shield circuits outside of the transmission are earthed to a stud on the drive motor generator power inverter module assembly. |
| • | The drive motor generator position sensor harness circuits are shielded. Improperly earthed shield circuits may cause inaccurate sensor signals. |
Reference Information
Schematic Reference
Hybrid Controls Schematics
Connector End View Reference
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Special Tools
| • | DT-44152 Jumper Harness |
| • | DT-48493 Jumper Harness |
For equivalent regional tools, refer to Special Tools .
Circuit/System Testing
Note: You must perform the Component Testing before proceeding with Circuit/System Testing.
- Vehicle OFF, disconnect the X175 harness connector at the transmission.
- Install the DT-44152 jumper harness to the vehicle harness side only.
- Vehicle ON, test for 0.8-1.4 V between the terminals listed below and earth:
| ⇒ | If greater than the specified range, test the signal circuit for a short-circuit to voltage, short-circuit to earth or an open circuit/high resistance. If the circuit tests normal replace the T6 power inverter module. |
- Vehicle ON, test for 6.5-7.5 V between the terminals listed below and earth:
| ⇒ | If outside the specified range, test the signal circuits for a short-circuit to voltage, short-circuit to earth or an open-circuit/high resistance. If the circuits test normal replace the T6 power inverter module. |
Component Testing
Note: If the transmission control wiring harness extension harness circuits fail the circuit tests, replace the transmission control wiring harness extension harness, do not repair.
- Verify that DTCs P1AF0, P1AF2 P1B43, P1E1E, P1E22, P1B0B, or P1B0C are not set.
- Vehicle OFF, disconnect the X175 harness connector at the transmission.
- Install the DT-48493 jumper harness to the transmission side only.
- Test for 10-25 Ω between terminal V and terminal W.
| ⇒ | If not within the specified range, test the transmission control wiring harness extension harness circuits for a short-circuit to voltage, short-circuit to earth or an open-circuit/high resistance. If the circuits test normal, replace the M15A drive motor with a generator assembly. |
- Test for 20-40 Ω between the signal terminal U and the signal terminal T.
| ⇒ | If not within the specified range, test the transmission control wiring harness extension harness circuits for a short-circuit to voltage, short-circuit to earth or an open-circuit/high resistance. If the circuits test normal, replace the M15A drive motor with a generator assembly. |
- Test for 30-60 Ω between the signal terminal L and the signal terminal M.
| ⇒ | If not within the specified range, test the transmission control wiring harness extension harness circuits for a short-circuit to voltage, short-circuit to earth or an open-circuit/high resistance. If the circuits test normal, replace the M15A drive motor with a generator assembly. |
- Test for greater than 10,000 Ω between the terminals listed below and earth:
| ⇒ | If not within the specified range, test the transmission control wiring harness extension harness circuits for a short-circuit to voltage, short-circuit to earth or an open-circuit/high resistance. If the circuits test normal, replace the M15A drive motor with a generator assembly. |
- Test for infinite resistance between the terminals listed below:
| ⇒ | If not within the specified range, test the transmission control wiring harness extension harness circuits for a short-circuit to voltage, short-circuit to earth or an open circuit/high resistance. If the circuits test normal, replace the M15A drive motor with a generator assembly. |
- If the test is passed refer to Circuit/System Testing.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for Drive Motor Generator Power Inverter Module, also called the power inverter module, replacement, programming and set-up |
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