Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.

Thoroughly check all connectors(and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage.

Has a problem been found ?

	▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure.
	▶ Go to "Power Circuit Inspection" procedure.

Lift vehicle with suitable lift and refer to shop manual to remove wheel and wheel guard.

Ignition "ON".

Back probe and measure voltage between Pin No.1(Power) terminal of Front LH wheel speed sensor and chassis ground.

Is the measured value within specifications ?

	▶ Go to "Signal Circuit Inspection" procedure.
	▶ Repair the circuit and then go to "Verification of vehicle Repair" procedure.

Lift vehicle with suitable lift and refer to shop manual to remove wheel and wheel guard.

Ignition "ON".

Rotate the disc slowly by hands.

Back probe and measure signal waveform between Pin No.2(Signal) terminal of Front LH wheel speed sensor and chassis ground with GDS.

Fig.1) Normal Front wheel speed sensor signal waveform when rotating wheel

Is the measured waveform within specifications ?

	▶ Go to "Verification of Vehicle Repair" procedure.
	▶ Repair the circuit harness connector and then go to "Component Inspection" procedure.