Component Inspection

Component Inspection

Wheel speed sensor circuit check
1. Lift the vehicle.
2. Ignition "ON" & Engine "OFF".
3. Turn the wheel by hand.
4. Measure waveform between signal terminal of the wheel speed sensor harness connector and chassis ground with oscilloscope.
A. Specification : High : 1.18 - 1.68V, Low : 0.59 - 0.84V




Normal waveform




5. Is the measured waveform within specifications ?
YES
1) Fault is intermittent caused by poor connection in wheel speed sensor harness (RL) and/or HECU's connector or was repaired and HECU memory was not cleared.
Go to "Verification of Vehicle Repair" procedure.
NO
1) Substitute with a known-good Wheel speed sensor and check for proper operation.
If problem is corrected, replace Wheel speed sensor and then go to "Verification of Vehicle Repair" procedure.