LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 6 (Anti-Lock Brake System - 4WAL) >> Diagnostic Tests >> DTC C0221, DTC C0222, DTC C0223, DTC C0224, DTC C0225, DTC C0226, DTC C0227: Wheel Speed Sensor Circuit Malfunction

DTC C0221, DTC C0222, DTC C0223, DTC C0224, DTC C0225, DTC C0226, DTC C0227: Wheel Speed Sensor Circuit Malfunction

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2001 GMC Savana Special, 2001 GMC Savana Camper Special, 2001 GMC Savana, 2001 Chevrolet Chevy Express, and 2000 GMC Savana Special. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform diagnostic system check. See DIAGNOSTIC SYSTEM CHECK  under DIAGNOSIS & TESTING. After performing diagnostic system check, go to next step.
  2. Using scan tool, clear DTCs. Turn ignition off. Turn ignition on. Recheck DTCs. If DTC resets, go to next step. If DTC does not reset, problem is intermittent.
  3. Raise and support vehicle. Disconnect wheel speed sensor harness connector. Using a DVOM, check resistance of wheel speed sensor. If resistance is 1575-3800 ohms, go to next step. If resistance is not 1575-3800 ohms, go to step  8 .
  4. Manually spin wheel as fast as possible. Using a DVOM, measure AC voltage generated by sensor as wheel spins. If voltage reading is greater than 50 mV, go to next step. If voltage reading is not greater than 50 mV, go to step  8 .
  5. Check for poor connections at wheel speed sensor harness connector. Repair as necessary. After repairs, go to step  10 . If connections are okay, go to next step.
  6. Disconnect wheel speed sensor harness connector. Check circuit for open, short to ground, short to voltage or shorted together. Repair as necessary. After repairs, go to step  10 . If circuit is okay, go to next step.
  7. Check for poor connections at EBCM harness connector. Repair as necessary. After repairs, go to step  10 . If connections are okay, go to step  9 .
  8. Replace wheel speed sensor. After replacing sensor, go to step  10 .
  9. Replace EBCM. After replacing EBCM, go to next step.
  10. Using scan tool, clear DTCs. Operate vehicle at speeds greater than 20 MPH. Recheck DTCs. If DTC resets, go to step  3 . If DTC does not reset, system is okay.
scientia non olet · About LEMON Manuals