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HOMESERVICE MANUALSCHEVROLET1994LUMINA BASEREPAIR AND DIAGNOSIS (SINGLE PAGE)BRAKESANTI-LOCK BRAKESANTI-LOCK BRAKE SYSTEM - ABS-VIDIAGNOSTIC CHARTSDTC 34 LEFT REAR WHEEL SPEED SENSOR CIRCUIT OPEN OR SHORTED TO BATTERY OR GROUNDNOTES
1994 Chevrolet Lumina Base

DTC 34 Left Rear Wheel Speed Sensor Circuit Open Or Shorted To Battery Or Ground: Notes

1994 Chevrolet Lumina BaseSECTION Notes

As tooth ring passes wheel speed sensor, changes in magnetic fields cause wheel speed sensor to produce an AC voltage signal whose frequency is proportional to wheel speed. The magnitude of the signal is directly related to wheel speed and proximity of wheel speed sensor to tooth ring, referred to as air gap. EBCM uses signal to compare individual wheel speed data and to detect wheel lock-up.

DTC 34 can set anytime after initialization if rear wheel speed sensor circuits are open or shorted to voltage or ground. DTC will be stored, ABS will be disabled and ABS warning light will turn on.

NOTE: Test numbers refer to numbers on diagnostic chart.
  1. Checks for short to ground in wheel speed sensor wiring.
  2. Checks for short to voltage in wheel speed sensor wiring.
  3. Checks for short to voltage in circuit No. 885 (Red wire).
  4. Checks for short to voltage in circuit No. 884 (Black wire).
  5. Ensures malfunction is not due to physical damage of circuitry.
  6. Checks for short to ground in circuit No. 885 (Red wire).
  7. Checks for short to ground in circuit No. 884 (Black wire).
  8. Checks for high resistance in wheel speed sensor jumper harness.
  9. Checks for high resistance in wheel speed sensor circuitry.
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