DTC C0235: Rear Speed Sensor Signal Circuit Open Or Grounded (Diesel Engines): Diagnosis
WARNING: This page does not describe the selected car, but rather 54 other vehicles, including the 1999 Oldsmobile Bravada, 1999 GMC Yukon, 1999 GMC Suburban, 1999 GMC Sonoma, and 1999 GMC Savana Special. However, it is still accessible from the selected car via links, so may be relevant.
- Perform diagnostic system check. See DIAGNOSTIC SYSTEM CHECK. After performing diagnostic system check, go to next step.
- Turn ignition off. Disconnect 10-pin EBCM harness connector. Turn ignition switch to RUN position. Check voltage between 10-pin EBCM harness connector terminal "E" and ground. If voltage is greater than 10 volts, go to step 4) . If not, go to next step.
- Turn ignition off. Disconnect VCM harness connector. Check resistance between 10-pin EBCM harness connector terminal "E" and VCM harness connector terminal No. 10 (VSS signal output). If resistance is infinite, go to step 5) . If not, go to step 8) .
- Turn ignition off. Reconnect VCM harness connector. Turn ignition switch to RUN position. Using scan tool, clear DTCs. Test drive vehicle at speed greater than 15 MPH. Check for DTCs. If DTC C0235 resets, go to step 6) . If DTC does not reset, go to step 7) .
- Check resistance between 10-pin EBCM harness connector terminal "E" and ground. If resistance is infinite, check VSS. If resistance is not infinite, go to step 9) .
- Replace EBCM.
- Malfunction is intermittent. Inspect all connectors and harnesses for damage which may result in high resistance when all components are connected. See DIAGNOSTIC AIDS .
- Repair open in VSS signal circuit between EBCM and VCM.
- Repair short to ground in VSS signal circuit.