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Home >> Oldsmobile >> 1998 >> Regency >> Repair and Diagnosis >> Brakes >> Anti-Lock Brake System With Traction Control System >> Diagnostic Tests >> DTC C1233: Right Front Wheel Speed Sensor Circuit Open Or Shorted

DTC C1233: Right Front Wheel Speed Sensor Circuit Open Or Shorted

  1. Perform diagnostic system check. See DIAGNOSTIC SYSTEM CHECK. After performing diagnostic system check, go to next step.
  2. Check right front wheel speed sensor connector and wiring for damage. Check right front wheel speed sensor for damage or looseness. If sensor, connector or wiring is faulty, go to next step. If sensor, connector or wiring is okay, go to step 4)  .
  3. Repair as necessary.
  4. Disconnect right front wheel speed sensor connector directly at sensor. Using DVOM, measure resistance between terminals of wheel speed sensor. If resistance is 850-1350 ohms, go to next step. If resistance is not 850-1350 ohms, go to step 6)  .
  5. Using DVOM, measure resistance between terminal "A" (White wire on "C" and "H" bodies; Dark Green wire on "E" and "K" bodies) of wheel speed sensor and ground. Also, using DVOM, measure resistance between terminal "B" (Black wire on "C" and "H" bodies; Tan wire on "E" and "K" bodies) of wheel speed sensor and ground. If resistance is infinite for both measurements, go to step 7)  . If resistance is not infinite for both measurements, go to next step.
  6. Replace right front wheel speed sensor.
  7. Turn ignition off. Disconnect EBCM/EBTCM connector. Connect breakout box and adapter cable to harness connector. On "C", "E" and "K" bodies, using DVOM, measure resistance between breakout box terminals No. 14 and "B". On "H" body, using DVOM, measure resistance between breakout box terminals No. 9 and "B". On all models, if resistance is infinite, go to step 9)  . If resistance is not infinite, go to next step.
  8. Repair short to ground in Tan wire on "C", "E" and "K" bodies, or Dark Green wire on "H" body between right front wheel speed sensor and EBCM/EBTCM.
  9. On "C", "E" and "K" bodies, using DVOM, measure resistance between breakout box terminals No. 30 and "B". On "H" body, using DVOM, measure resistance between breakout box terminals No. 25 and "B". On all models, if resistance is infinite, go to step 11)  . If resistance is not infinite, go to next step.
  10. Repair short to ground in Dark Green wire on "C", "E" and "K" bodies, or Tan wire on "H" body between right front wheel speed sensor and EBCM/EBTCM.
  11. Reconnect right front wheel speed sensor connector. On "C", "E" and "K" bodies, using DVOM, measure resistance between breakout box terminals No. 14 and 30. On "H" body, using DVOM, measure resistance between breakout box terminals No. 9 and 25. On all models, if resistance is 850-1350 ohms, go to step 15)  . If resistance is not 850-1350 ohms, go to next step.
  12. On "C", "E" and "K" bodies, connect a fused jumper between breakout box terminals No. 30 and "B". On "H" body, connect a fused jumper between breakout box terminals No. 25 and "B". On all models, disconnect right front wheel speed sensor connector. On "C" body, using DVOM, measure resistance between terminal "B" (Black wire) of wheel speed sensor and ground. On "E", "H" and "K" bodies, using DVOM, measure resistance between terminal "A" (Dark Green wire on "E" and "K" bodies; White wire on "H" body) of wheel speed sensor and ground. On all models, if resistance is 0-5 ohms, go to next step. If resistance is not 0-5 ohms, go to step 14)  .
  13. Repair open in White wire on "C" body, Tan wire on "E" and "K" bodies or Black wire on "H" body between right front wheel speed sensor and EBCM/EBTCM.
  14. Repair open in Black wire on "C" body, Dark Green wire on "E" and "K" bodies, or White wire on "H" body between right front wheel speed sensor and EBCM/EBTCM.
  15. Turn ignition on, with engine off. On "C", "E" and "K" bodies, using DVOM, measure voltage at breakout box terminal No. 14. On "H" body, using DVOM, measure voltage at breakout box terminal No. 9. On all models, if voltage is greater than one volt, go to next step. If voltage is less than one volt, go to step 17)  .
  16. Repair short to voltage in Tan wire on "C", "E" and "K" bodies, or Dark Green wire on "H" body between right front wheel speed sensor and EBCM/EBTCM.
  17. On "C", "E" and "K" bodies, using DVOM, measure voltage at breakout box terminal No. 30. On "H" body, using DVOM, measure voltage at breakout box terminal No. 25. On all models, if voltage is greater than one volt, go to next step. If voltage is less than one volt, go to step 19)  .
  18. Repair short to voltage in Dark Green wire on "C", "E" and "K" bodies, or Tan wire on "H" body between right front wheel speed sensor and EBCM/EBTCM.
  19. Replace EBCM/EBTCM.
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