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Home >> Oldsmobile >> 1998 >> Regency >> Repair and Diagnosis >> Brakes >> Anti-Lock Brake System With Traction Control System >> Diagnostic Tests >> DTC C1232: Left Front Wheel Speed Sensor Circuit Open Or Shorted

DTC C1232: Left 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 left front wheel speed sensor connector and wiring for damage. Check left 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 left 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; Yellow 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; Light Blue 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 left 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. 15 and "B". On "H" body, using DVOM, measure resistance between breakout box terminals No. 8 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 White wire on "C" and "H" bodies, or Yellow wire on "E" and "K" bodies between left front wheel speed sensor and EBCM/EBTCM.
  9. On "C", "E" and "K" bodies, using DVOM, measure resistance between breakout box terminals No. 31 and "B". On "H" body, using DVOM, measure resistance between breakout box terminals No. 24 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 Black wire on "C" and "H" bodies, or Light Blue wire on "E" and "K" bodies between left front wheel speed sensor and EBCM/EBTCM.
  11. Reconnect left front wheel speed sensor connector. On "C", "E" and "K" bodies, using DVOM, measure resistance between breakout box terminals No. 15 and 31. On "H" body, using DVOM, measure resistance between breakout box terminals No. 8 and 24. 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. 31 and "B". On "H" body, connect a fused jumper between breakout box terminals No. 24 and "B". On all models, disconnect left front wheel speed sensor connector. Using DVOM, measure resistance between terminal "B" (Black wire on "C" and "H" bodies; Light Blue wire on "E" and "K" bodies) of wheel speed sensor and ground. 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" and "H" bodies, or Yellow wire on "E" and "K" bodies between left front wheel speed sensor and EBCM/EBTCM.
  14. Repair open in Black wire on "C" and "H" bodies, or Light Blue wire on "E" and "K" bodies between left 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. 15. On "H" body, using DVOM, measure voltage at breakout box terminal No. 8. 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 White wire on "C" and "H" bodies, or Yellow wire on "E" and "K" bodies between left front wheel speed sensor and EBCM/EBTCM.
  17. On "C", "E" and "K" bodies, using DVOM, measure voltage at breakout box terminal No. 31. On "H" body, using DVOM, measure voltage at breakout box terminal No. 24. 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 Black wire on "C" and "H" bodies, or Light Blue wire on "E" and "K" bodies between left front wheel speed sensor and EBCM/EBTCM.
  19. Replace EBCM/EBTCM.
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