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 "Squib Circuit Inspection" procedure.

Ignition "OFF".

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

Disconnect Curtain Airbag -Passenger module and connect the dummy and dummy adapter to main harness connector.

Connect (-) terminal cable to battery and Ignition "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.

Are any DTCs stored in the system?

	▶ Go to "Main harness Circuit Inspection" procedure.
	▶ Carefully re-do this troubleshooting guide steps. ▶ If problem still occurs, replace Curtain Airbag -Driver module and then go to "Verification of Vechicle Repair" procedure.

Ignition switch "OFF".

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

Disconnect PCAB connector.

Ignition Switch "ON", Engine "OFF"

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

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

Fig.1) High & Low Signal Waveform of Curtain Airbag -Passenger(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.