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 B2228, B2230, B2232, B2234 DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	INSPECT DRIVER-SIDE AIR BAG MODULE (INFLATOR NO.2) Using the WDS or equivalent, verify the following PID/DATA monitor. (See PID/DATA MONITOR TABLE .) D_ABAGR2 Is the resistance of the driver-side air bag module normal? Resistance: 1.5-3.7 ohms	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 DRIVER-SIDE AIR BAG MODULE CONNECTOR (CLOCK SPRING) 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. Disconnect the driver-side air bag module connector. Is there any malfunction of the driver-side air bag module connector?	Yes	Replace the air bag wiring harness.
2		No	Go to the next step.
3	VERIFY WHETHER MALFUNCTION IS IN DRIVER-SIDE AIR BAG MODULE (INFLATOR NO.2) OR RELATED WIRING HARNESS Connect the leads of the SST (Fuel and thermometer checker) or apply 2-ohm resistance to driver-side air bag module (inflator No.1) connector terminals 3A and 3B, and driver-side air bag module (inflator No.2) connector terminals 4A and 4B. Set the resistance of the SST (Fuel and thermometer checker) to the 2-ohm position. Connect the negative battery cable. Turn the ignition switch to the ON position. Using the WDS or equivalent, verify the following PID/DATA monitor. (See PID/DATA MONITOR TABLE .) OD_DAB2_ST Are related wiring harnesses normal?	Yes	Replace the driver-side air bag module. (See DRIVER-SIDE AIR BAG MODULE REMOVAL/INSTALLATION .)
3		No	Go to the next step.
4	INSPECT CLOCK SPRING Inspect the clock spring. (See CLOCK SPRING INSPECTION .) Is the clock spring normal?	Yes	Go to the next step.
4		No	Replace the clock spring. (See CLOCK SPRING REMOVAL/INSTALLATION .)
5	INSPECT WIRING HARNESS BETWEEN CLOCK SPRING AND SAS CONTROL MODULE 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 side air bag module connectors. Disconnect the driver and passenger-side curtain air bag module connectors. Remove the rear door lower trim. Disconnect the driver and passenger-side pre-tensioner seat belt connectors. Partially peel back the floor covering. Disconnect the SAS control module connector. Inspect the wiring harness between SAS control module terminal 1G and clock spring terminal 1B, SAS control module terminal 1J and clock spring terminal 1A for the following: Short to ground Short to power supply Open circuit Is the wiring harness normal?	Yes	[Present malfunction diagnosis] Replace the SAS control module. (See SAS CONTROL MODULE REMOVAL/INSTALLATION .) [Past malfunction diagnosis] DTC troubleshooting completed.
5		No	Replace the air bag wiring harness.