Power Steering Control Module (PSCM)
DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTCs | Description | Action |
|---|---|---|
| B1317 | Battery Voltage High | Go to PINPOINT TEST A . |
| B1318 | Battery Voltage Low | Go to PINPOINT TEST A . |
| B1342 | ECU is Faulted | INSTALL a new steering column. Refer to STEERING COLUMN article. |
| B2277 | Electric Power Steering Motor Malfunction | INSTALL a new steering column. Refer to STEERING COLUMN article. |
| B2278 | Steering Shaft Torque Sensor Malfunction | INSTALL a new steering column. Refer to STEERING COLUMN article. |
| B2477 | Module Configuration Failure | CONFIGURE the PSCM . Refer to Programmable Module Installation (PMI) in MODULE CONFIGURATION article. CALIBRATE the steering wheel position sensor. Refer to STEERING WHEEL POSITION SENSOR CALIBRATION in this service information. CLEAR the DTCs. REPEAT the self-test. If DTC B2477 is retrieved again, INSTALL a new steering column. Refer to STEERING COLUMN article. REPEAT the self-test. |
| B227B | Steering Shaft Position Sensor Malfunction | INSTALL a new steering column. Refer to STEERING COLUMN article. |
| C195C | Electronic Power Assist Limited Operation Mode Detected | Go to PINPOINT TEST D |
| C2000 | Steering Angle Sensor Not Calibrated | CALIBRATE the steering wheel position sensor. Refer to STEERING WHEEL POSITION SENSOR CALIBRATION this service information. CLEAR the DTCs. REPEAT the self-test. If DTC C2000 is retrieved again, INSTALL a new steering column. Refer to STEERING COLUMN article. REPEAT the self-test. |
| P0635 | Power Steering Control Circuit | This DTC indicates that the steering request made by the Parking Aid Module (PAM) exceeds the physical limits of the steering system. CHECK the front toe settings. Refer to Toe Adjustment in SUSPENSION SYSTEM - GENERAL INFORMATION article. ADJUST as necessary. If the front toe settings are OK, CALIBRATE the steering wheel position sensor. Refer to STEERING WHEEL POSITION SENSOR CALIBRATION in this service information. CLEAR the DTC. Carry out a self test of the PSCM . If the DTC returns, Carry out a self test of the PAM . Refer to ACTIVE PARK ASSIST article. If there are no DTCs in the PAM , INSTALL a new steering column. Refer to STEERING COLUMN article. |
| P1653 | Power Steering Output Circuit | This DTC indicates that the difference between the steering angle request made by the Parking Aid Module (PAM) and the actual steering angle measured by the PSCM
exceed a preset limit. CALIBRATE the steering wheel position sensor. Refer to STEERING WHEEL POSITION SENSOR CALIBRATION in this service information. CLEAR the DTC. Carry out a self test of the PSCM . If the DTC returns, Carry out a self test of the PAM . Refer to ACTIVE PARK ASSIST article to diagnose any DTCs. If there are no DTCs in the PAM , INSTALL a new steering column. Refer to STEERING COLUMN article. |
| U0100 | Lost Communication With ECM/PCM | REPAIR all other DTCs first. If DTC U0100 is still present, Refer to MODULE COMMUNICATIONS NETWORK article to diagnose the High Speed Controller Area Network (HS-CAN) bus. |
| U0101 | Lost Communication With TCM | REPAIR all other DTCs first. If DTC U0101 is still present, Refer to MODULE COMMUNICATIONS NETWORK article to diagnose the HS-CAN bus. |
| U0121 | Lost Communication With ABS | REPAIR all other DTCs first. If DTC U0121 is still present, Refer to MODULE COMMUNICATIONS NETWORK article to diagnose the HS-CAN bus. |
| U0155 | Lost Communication With Instrument Panel Cluster | REPAIR all other DTCs first. If DTC U0155 is still present, Refer to MODULE COMMUNICATIONS NETWORK article to diagnose the HS-CAN bus. |
| U0159 | Lost Communication With Parking Assist Control Module | REPAIR all other DTCs first. If DTC U0159 is still present, Refer to MODULE COMMUNICATIONS NETWORK article to diagnose the HS-CAN bus. |
| U0402 | Invalid Data Received from TCM | This DTC indicates that the PSCM has received an "invalid data" message from the TCM . The TCM is part of the PCM. RETRIEVE and RECORD all DTCs from the PCM. Refer to the INTRODUCTION article to diagnose the DTCs. |
| U0415 | Invalid Data From ABS | VERIFY the correct PSCM configuration. VERIFY that the correct Vehicle Identification Number (VIN) is programmed to the PCM. Carry out the PCM self-test, RETRIEVE and RECORD any DTCs. Refer to the Diagnostic Trouble Code (DTC) Chart in MULTIFUNCTION ELECTRONIC MODULE article. |
| U045A | Invalid Data From Parking Assist Control Module | VERIFY the correct PSCM configuration. VERIFY that the correct VIN is programmed to the PCM. Carry out the PCM self-test, RETRIEVE and RECORD any DTCs. Refer to the Diagnostic Trouble Code (DTC) Chart in MULTIFUNCTION ELECTRONIC MODULE article. |
| U2023 | Fault Received From External Node | One or more modules are reporting a DTC. RETRIEVE DTCs from all other modules. Refer to the module's respective service information for diagnosis. If no DTCs are present, Refer to MODULE COMMUNICATIONS NETWORK article to diagnose the HS-CAN bus. |
| U2499 | ECU Overheat Protection | The PSCM
uses a thermistor to monitor the internal temperature of the EPAS gear. This DTC alone does not indicate a fault in the PSCM
. It indicates an over-temperature condition due to ambient conditions and/or a heavy load on the EPAS
system. DIAGNOSE all other PSCM DTCs before diagnosing DTC U2499. If no other DTCs are present, ADVISE the customer that high ambient temperatures and/or heavy loads on the EPAS system causes this DTC to set, resulting in higher than usual steering effort. A heavy load is defined as multiple parking lot maneuvers over a short duration of time, possibly with low tire pressure, or towing for long distances followed by multiple parking maneuvers. |