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

Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration,or damage.

Has a problem been found?

	▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.
	▶ go to "Main harness Circuit Inspection" procedure.

Ignition Switch "OFF".

Disconnect the battery (-) terminal cable from the battery, and wait at least one minutes.

Disconnect the front impact sensor.

Ignition switch "ON" , engine "OFF"

Measure signal waveform between Pin No. 2 (High) terminal of Front Impact Sensor(FIS)-Driver harness connector and chassis ground.

Measure signal waveform between Pin No. 1 (Low) terminal of Front Impact Sensor(FIS)-Driver harness connector and chassis ground.

Fig.1) High & Low Signal Waveform of Driver Side Front Impact Sensor(Disconnected Connector)

Is the measured signal waveform within specifications?

	▶ Go to "Component Inspection" procedure.
	▶ If no problems were found with the circuits or connectors, Replace the main wiring of SRSCM and go to "Verification of Vehicle Repair" procedure.