Wheel Speed Sensor: Testing and Inspection

Fig. 56, Speed Sensor Terminal ID:

Fig. 57, Speed Sensor Continuity Specification:

Fig. 58, Checking Speed Sensor:

1. Check continuity at control unit terminals, Fig. 56 through 58.
2. If continuity is not as specified, check wiring harness between wheel speed sensor and control unit.
3. On 1990-91 models, if continuity is satisfactory, check voltage between D and F, H and I, U and W, X and Z while rotating wheel one revolution per second by hand.
4. On 1993 models, if continuity is satisfactory, check voltage between 1K and 1G, 10 and 1Q, 1U and 1F, 1L and 1P while rotating wheel one revolution per second by hand.
5. If voltage is not approximately 50 - 60 mV, the control unit is faulty.