DTC 23 Right Front Wheel Speed Sensor Continuity Fault: Notes

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.

EBTCM/EBCM will only set one wheel speed sensor DTC at a time, even if multiple faults exist. Detection is prioritized accordingly: LF, RR, LR and RF. Check for additional stored DTCs after making repairs.

DTC 23 will set if there is a short to battery voltage or open in circuits No. 872 or 833, or a faulty wheel speed sensor. DTC 21 may set if circuits No. 872 or 833 lose continuity and wheel speed sensor signal is lost while driving. DTC 23 should accompany this DTC on next ignition cycle. If DTCs 21 and 23 are set concurrently, diagnose DTC 23 first.

1. Checks for correct resistance in sensor.
2. Checks for short to battery voltage 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 DTC resets at key on. If it does, wheel bearing/speed sensor may be causing fault.
6. Checks if DTC 21 sets during road test.
7. DTC 23 sets when vehicle is at rest. DTC 21 sets with a problem in speed sensor circuitry with vehicle in motion.
8. Wheel speed sensor may be causing an intermittent fault.