ASE G1 Auto Maintenance and Light RepairElectrical/Electronic SystemsMedium
A vehicle's dashboard warning light for the anti-lock braking system (ABS) illuminates intermittently. A technician connects a scan tool and retrieves Diagnostic Trouble Code (DTC) C0035. What does this code most likely indicate?
- AA low brake fluid level.
- BA faulty ABS hydraulic control unit.
- CAn open circuit in the brake light switch.
- DAn issue with the right front wheel speed sensor circuit.
Show answer & explanationAnswer & explanation
Correct answer: D. An issue with the right front wheel speed sensor circuit.
DTC C0035 specifically refers to a fault within the Right Front Wheel Speed Sensor Circuit. This is a common ABS diagnostic code indicating a problem with the sensor or its wiring.
Why the other options are wrong
- A. Low brake fluid typically triggers the BRAKE warning light, not specifically an ABS light with a C0035 code.
- B. A faulty ABS hydraulic control unit would likely trigger a different DTC, often related to internal valve or pump issues.
- C. An open circuit in the brake light switch would primarily affect brake light operation and potentially cruise control, not specifically cause a C0035 ABS code.
ABS DTC C0035
DTC C0035 indicates a malfunction in the right front wheel speed sensor circuit, affecting the ABS system's ability to monitor wheel speed.
- Specific to Right Front Wheel Speed Sensor.
- Affects ABS operation.
- Can cause intermittent ABS light.
Memory trick: ABS codes pinpoint the 'who, what, where' of the braking system's glitches.