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Symptom: LEFT FRONT SENSOR CIRCUIT FAILURE When Monitored and Set Condition: LEFT FRONT SENSOR CIRCUIT FAILURE When Monitored: Ignition on. The CAB monitors the wheel speed circuit every 7 milliseconds (ms). Set Condition: If the CAB detects an open or shorted wheel speed sensor circuit, the Diagnostic Trouble Code (DTC) will set. POSSIBLE CAUSES LEFT FRONT WHEEL SPEED SENSOR OR CONNECTOR DAMAGE INTERMITTENT DTC LEFT FRONT WHEEL SPEED SENSOR (+) CIRCUIT SHORTED TO GROUND LEFT FRONT WHEEL SPEED SENSOR (-) CIRCUIT SHORTED TO GROUND LEFT FRONT WHEEL SPEED SENSOR SHORTED TO GROUND CAB - INTERNAL SHORT OR OPEN LEFT FRONT WHEEL SPEED SENSOR (+) CIRCUIT OPEN LEFT FRONT WHEEL SPEED SENSOR (-) CIRCUIT OPEN LEFT FRONT WHEEL SPEED SENSOR (+) CIRCUIT SHORTED TO VOLTAGE LEFT FRONT WHEEL SPEED SENSOR (-) CIRCUIT SHORTED TO VOLTAGE LEFT FRONT WHEEL SPEED SENSOR CIRCUITS SHORT TOGETHER LEFT FRONT WHEEL SPEED SENSOR RESISTANCE OUT OF SPECIFICATION TEST ACTION APPLICABILITY 1 Turn the ignition on. t, read DTC’s. With the DRBIII t, erase DTC’s. Turn the ignition off. t, read DTC’s. Does the DRBIII t display 9Left Front Wheel Speed Sensor Circuit Failure9 DTC present right now? All Yes → No → 2 Turn the ignition off. All Yes → Repair as necessary. No → 19 BRAKES (CAB) |