Many malfunctions in the electrical system are caused by poor harness(es) and terminals.

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 "Squib Circuit Inspection" procedure.

Ignition switch "OFF".

Disconnect (-) terminal cable from battery and wait for 1 minutes or more.

Remove the DBPT connector and connect the dummy and dummy adapter to the BPT connector.

Connect (-) terminal cable to battery and Ignition switch "ON" & Engine "OFF" and wait for 30 seconds or more.

Connect GDS to Data Link Connector(DLC) and clear DTC with GDS and diagnose again.

Is any DTC present?

	▶ Go to "Main Circuit Inspection" procedure.
	▶ If no problems were found with the circuits or connectors, Replace the BPT and go to "Verification of Vehicle Repair" procedure.

Ignition switch "OFF".

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

Disconnect DBPT and SRSCM connector.

Ignition Switch "ON", Engine "OFF"

Measure waveform between terminal pin No.2(Low) of DBPT harness connector and chassis ground.

Measure waveform between terminal pin No.1(High) of DBPT harness connector and chassis ground.

Fig.1) High & Low Signal Waveform of Driver Pretensioner(Disconnected Connector)

Are the measured value within specification?

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