Code 23 - Right Front Wheel Speed Sensor Continuity Fault

Toothed wheel generates a voltage pulse as it moves past sensor. EBTCM/EBCM uses these pulses to determine wheel speed. EBTCM/EBCM uses wheel speed sensor signal to calculate vehicle reference speeds and speed, acceleration and slip values for each wheel. These values are used to determine when anti-lock control is needed. Code 23 is set if there is a short to voltage or ground in circuits No. 872 or 833, or faulty speed sensor. Testing for this fault occurs with ignition on and vehicle at rest.

1. Checks for correct resistance in sensor.
2. Checks for short to battery in either speed sensor circuit wire. Circuit No. 872 should have 5 volts.
3. Checks for an open in both speed sensor circuit wires.
4. Manipulates wiring and connectors to induce an intermittent fault not currently present.
5. Checks if code resets at key on. If it does, wheel bearing/speed sensor may be causing fault.
6. Checks if Code 21 sets during road test.
7. Code 23 sets when vehicle is at rest. Code 21 sets with a problem in speed sensor circuitry with vehicle in motion.
8. Wheel speed sensor may be causing an intermittent fault.