Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provide overview of each diagnostic category. |
DTC Descriptor
DTC C0460 00: Steering Position SensorDiagnostic Fault Information
Circuit | Short to Ground | Open or High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
motor rotational sensor | C0460 00* | C0460 00* | -- | -- |
*After verifying a circuit fault exists in the power steering wiring harness extension harness for two mode hybrid. The wiring harness is to be replaced and not repaired | ||||
Circuit/System Description
The power steering control module (PSCM) continuously monitors the motor rotational sensor sinusoidal voltage signals. The sinusoidal voltage signals of the motor rotational sensor and the angle difference between the steering output and input shafts detected by the torque sensor are both processed by the PSCM to detect and calculate the steering wheel angle.
Conditions for Running the DTC
Ignition ON.
Conditions for Setting the DTC
| • | The PSCM detects open, short to ground or short between any of the motor rotational sensor circuits. |
| • | The PSCM detects the steering wheel angle is outside the valid range of -720 to +720 degrees. |
Actions Taken When DTC Sets
| • | DTC C0460 00 is stored in memory. |
| • | The driver information center (DIC) displays the SERVICE POWER STEERING message. |
| • | No steering assist. |
Conditions for Clearing the DTC
| • | A current DTC will clear on the next malfunction free ignition cycle. |
| • | A history DTC will clear after 100 consecutive malfunction-free ignition cycles. |
Reference Information
Connector End View Reference
Description and Operation
Power Steering System Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Engine running, then center the steering wheel, observe the scan tool Steering Wheel Position parameter, the reading should be 0 +/- 10 degrees.
| ⇒ | If not within the specified range, perform the steering position torque sensor calibration, and verify DTC C0460 is not set as current. |
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. |
Important: After verifying a circuit fault exists in the Power Steering Wiring Harness Extension Harness for Two Mode Hybrid. The wiring harness is to be replaced and not repaired.
- Perform the High Voltage Disabling procedure.
- Ignition OFF, connect the 12-volt battery.
- Ignition OFF, disconnect the X3 harness connector at the PSCM.
- Test for 3K-10K ohms between the rotational sensor low reference circuit terminal 1 and the rotational sensor signal circuit terminal 7.
- Test for 6K-20K ohms between the rotational sensor low reference circuit terminal 1 and the rotational sensor signal circuit terminal 8.
- Test for greater than infinite resistance between the rotational sensor exciting ground circuit terminal 3 and the EPS motor housing.
- If all circuits test normal, test or replace the PSCM.
| ⇒ | If not within the specified range, test the signal circuit and the low reference circuit for an open/high resistance or a short together. If the circuits test normal, replace the power steering assist motor. |
| ⇒ | If not within the specified range, test the rotational sensor signal circuit and the rotational sensor low reference circuit for an open/high resistance or a short together. If the circuits test normal, replace the power steering assist motor. |
| ⇒ | If less than the specified range, test the appropriate circuit for a short to ground. If the circuits test normal, replace the power steering assist motor. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for PSCM replacement, setup, and programming |
