Diagnostic Procedure

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

Step	Inspection		Action
1	INSPECT PASSENGER-SIDE CURTAIN AIR BAG MODULE CONNECTOR WARNING: Handling the component parts improperly can accidentally operate (deploy) the air bag module, which may seriously injure you. Read the service warnings/cautions and the Service Information before handling the air bag system components. (See AIR BAG SYSTEM SERVICE WARNINGS .) (See AIR BAG SYSTEM SERVICE CAUTIONS .) Switch the ignition to off Disconnect the negative battery cable and wait for 1 min or more Remove the following parts Rear scuff plate (See REAR SCUFF PLATE REMOVAL/INSTALLATION .) Rear side seat back (See REAR SIDE SEAT BACK REMOVAL/INSTALLATION .) C-pillar trim (See C-PILLAR TRIM REMOVAL/INSTALLATION .) Disconnect the passenger-side curtain air bag module connector (See CURTAIN AIR BAG MODULE REMOVAL/INSTALLATION .) Is there any malfunction of the passenger-side curtain air bag module connector?	Yes	Replace the passenger-side curtain air bag module wiring harness
1		No	Go to the next step
2	INSPECT PASSENGER-SIDE CURTAIN AIR BAG MODULE Switch the ignition to off. Disconnect the negative battery cable and wait for 1 min or more . Connect the SST (Fuel and thermometer checker) or apply 2-ohm resistance to the passenger-side curtain air bag module connector terminals A-B Set the SST (Fuel and thermometer checker) to 2 ohm . Connect the negative battery cable. Clear DTCs using the M-MDS (See CLEARING DTC .) Perform the DTC inspection for the SAS control module using the M-MDS Are DTCs B1129:11, B1129:12, B1129:19, B1129:1A and/or B1129:1B displayed?	Yes	Go to the next step.
2		No	Replace the passenger-side curtain air bag module. (See CURTAIN AIR BAG MODULE REMOVAL/INSTALLATION .)
3	INSPECT WIRING HARNESS BETWEEN SAS CONTROL MODULE AND PASSENGER-SIDE CURTAIN AIR BAG MODULE Switch the ignition to off. Disconnect the negative battery cable and wait for 1 min or more . Disconnect the SST (Fuel and thermometer checker) or the 2 ohm resistance. Disconnect all SAS control module connectors. Inspect the wiring harnesses between SAS control module connector terminal 1O and passenger-side curtain air bag module connector terminal A, and SAS control module connector terminal 1M and passenger-side curtain air bag module connector terminal B for the following: Short to body ground Open circuit Short circuit between terminals NOTE: Inspect for continuity while shaking the wiring harness between the SAS control module and passenger-side curtain air bag module. Is the wiring harness normal?	Yes	Go to the next step.
3		No	Replace the wiring harness between the SAS control module and the passenger-side curtain air bag module
4	INSPECT THE WIRING HARNESS BETWEEN THE SAS CONTROL MODULE AND PASSENGER-SIDE CURTAIN AIR BAG MODULE FOR A SHORT CIRCUIT TO THE POWER SUPPLY Connect the negative battery cable. Switch the ignition to ON. Measure the voltage of SAS control module connector terminals 1O and 1M of SAS control module harness side connector. NOTE: Measure the voltage while shaking the wiring harness between the SAS control module and passenger-side curtain air bag module. Is the voltage measured?	Yes	Replace the wiring harness between the SAS control module and the passenger-side curtain air bag module.
4		No	Go to the next step
5	INSPECT DTCs Switch the ignition to off Disconnect the negative battery cable and wait for 1 min or more . Reconnect all disconnected connectors. Connect the negative battery cable Switch the ignition to ON Clear DTCs using the M-MDS (See CLEARING DTC .) Verify DTCs using the M-MDS. (See DTC INSPECTION .) Is DTC B1129:11, B1129:12, B1129:19, B1129:1A and/or B1129.1B displayed again? Are there other DTCs output?	Yes	Replace the SAS control module (See SAS CONTROL MODULE REMOVAL/INSTALLATION .)
5		No	DTC troubleshooting completed