Diagnostic procedure

WARNING: This page is about a different car, the 2005 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.

DTC C1947, C1948, C1981 DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	INSPECT SEAT TRACK POSITION SENSOR CIRCUIT Using the WDS or equivalent, verify the following PID/DATA monitor. (See PID/DATA MONITOR TABLE .) TRAK_SW Is the seat track position sensor circuit normal?	Yes	[Present malfunction diagnosis] Replace the SAS control module. (See SAS CONTROL MODULE REMOVAL/INSTALLATION .) [Past malfunction diagnosis] DTC troubleshooting completed.
1		No	Go to the next step.
2	INSPECT WIRING HARNESS BETWEEN SEAT TRACK POSITION SENSOR AND SAS CONTROL MODULE WARNING: Handling the air bag system components improperly can accidentally deploy the air bag modules and pre-tensioner seat belts, which may seriously injure you. Read the service warnings and cautions before handling the air bag system components. (See SERVICE WARNINGS .) (See SERVICE CAUTIONS .) Turn the ignition switch to the LOCK position. Disconnect the negative battery cable and wait for 1 min or more. Remove the column cover. Disconnect the clock spring connector. Remove the glove compartment. Disconnect the passenger-side air bag module connector. Disconnect the driver and passenger-side curtain air bag module connectors. Disconnect the driver and passenger-side side air bag module connectors. Remove the rear door lower trims. Disconnect the driver and passenger-side pre-tensioner seat belt connectors. Disconnect the seat track position sensor connector Inspect the wiring harness between SAS control module terminal and seat track position sensor terminals for short to ground, short to power supply, and open circuit: 2W-A 2X-B Is the wiring harness normal?	Yes	Replace the seat track position sensor, then go to the next step.
2		No	Replace wiring harness, then go to the next step.
3	INSPECT SAS CONTROL MODULE Connect the SAS control module connector. Connect the clock spring connector. Connect the passenger-side air bag module connector. Connect the driver-and passenger-side curtain air bag module connectors. Connect the driver-and passenger-side side air bag module connectors. Connect the driver-and passenger-side pre tensioner seat belt connectors. Connect the seat track position sensor connector. Are DTCs C1947, C1948 and/or C1981 indicated?	Yes	[Present malfunction diagnosis] Replace the SAS control module. (See SAS CONTROL MODULE REMOVAL/INSTALLATION .) [Past malfunction diagnosis] DTC troubleshooting completed.
3		No	DTC troubleshooting completed.