PINPOINT TEST X: DTCs C1B00:28, 29 AND 64
- X1 CHECK OTHER MODULES FOR COMMUNICATION ISSUES
- Connect the scan tool.
- Ignition ON.
- Using the scan tool, carry out a Network Test.
- Retrieve and record all Continuous Memory Diagnostic Trouble Codes (CMDTCs).
- Are there any communication (U-code) DTCs present in the ABS module or any other modules?
- Yes:
DIAGNOSE all U-code DTCs before diagnosing DTC C1B00:28, 29 or 64.
For ABS module U-code DTCs, REFER to the ABS MODULE DTC CHART in this service information.
For all other modules, REFER to the Master DTC Chart in MULTIFUNCTION ELECTRONIC MODULE article.
- No: GO to X2 .
- X2 CHECK THE PSCM COMMUNICATIONS
- Review the results from the Network Test.
- Did the PSCM pass the Network Test?
- Yes: GO to X3 .
- No: REFER to the Symptom Chart in MODULE COMMUNICATIONS NETWORK article to diagnose the no communication issue.
- X3 CHECK THE PSCM FOR NON-COMMUNICATION DTCs
- Review the DTCs recorded after the Network Test.
- Are DTCs B1342, B2277, B2278 and/or B277B present in the PSCM?
- Yes: REFER to STEERING SYSTEM article to diagnose the PSCM DTCs.
- No: GO to X4 .
- X4 CHECK FOR RETURNING ABS MODULE DTCs
- Using the scan tool, clear the ABS module DTCs.
- Ignition OFF.
- Ignition ON.
- Test drive the vehicle and make several turns or circles in both directions.
- Enter the following diagnostic mode on the scan tool: Self Test - ABS Module.
- Are DTCs C1B00:28, 29 and/or 64 present in the ABS module?
- X5 CHECK THE HARNESS AND CONNECTORS
- Ignition OFF.
- Disconnect: PSCM C2231A.
- Disconnect: ABS Module C155.
- Inspect both connectors for:
- corrosion.
- spread terminals.
- bent pins.
- pushed-out pins and terminals.
- Inspect the wire harnesses associated with the connectors for:
- corrosion.
- pinched, cut or pierced wires.
- Are the connectors and harnesses OK?
- Yes: GO to X6 .
- No:
REPAIR or INSTALL new as necessary.
Refer to SYSTEM WIRING DIAGRAMS article for schematic and connector information.
CLEAR the DTCs. REPEAT the self-test.
- X6 CHECK FOR AN INTERMITTENT CONCERN
- Connect: PSCM C2231A.
- Connect: ABS Module C155.
- Ignition ON.
- Attempt to recreate the fault by wiggling connectors (including any in-line connectors) and flexing the wire harness, tilting and rotating the steering wheel frequently.
- Enter the following diagnostic mode on the scan tool: Self Test - ABS Module.
- Are DTCs C1B00:28, 29 and/or 64 present in the ABS module?
- Yes:
REPAIR or INSTALL new as necessary. Refer to SYSTEM WIRING DIAGRAMS
article, Connector Repair Procedures
for schematic and connector information.
CLEAR the DTCs. REPEAT the self-test.
- No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
- X7 CALIBRATE THE STEERING ANGLE SENSOR
- Calibrate the steering angle sensor. Refer to STEERING WHEEL POSITION SENSOR CALIBRATION in this service information.
- Ignition OFF.
- Ignition ON.
- Test drive the vehicle and make several turns or circles in both directions.
- Enter the following diagnostic mode on the scan tool: Self Test - ABS Module.
- Does DTC C1B00:28 return?
- Yes: GO to X8 .
- No: The system is operating correctly at this time. The concern may have been caused by an incorrectly calibrated sensor.
- X8 CHECK THE STEERING WHEEL ANGLE POSITION (SWA_POS) PID
- Enter the following diagnostic mode on the scan tool: DataLogger - ABS Module.
- Monitor the SWA_POS PID while rotating the steering wheel from lock to lock.
- Does the PID change when the steering wheel is turned?
- Yes: INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE in this service information. CLEAR the DTCs. REPEAT the self-test.
- No: INSTALL a new steering column. REFER to STEERING COLUMN article. CLEAR the DTCs. REPEAT the self-test.