Diagnostic procedure

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

DIAGNOSTIC PROCEDURE - DTC B2434, B2435, B2691

STEP	INSPECTION		ACTION
1	INSPECT DRIVER-SIDE BUCKLE SWITCH CIRCUIT Using the WDS or equivalent, verify the following PID/DATA monitor. (See PID/DATA MONITOR TABLE [TWO-STEP DEPLOYMENT CONTROL SYSTEM] .) DR_BUKL Is the driver-side front buckle switch normal?	Yes	[Present malfunction diagnosis] Replace the SAS control module. (See SAS CONTROL MODULE REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM] .) [Past malfunction diagnosis] DTC troubleshooting completed.
1		No	Go to the next step.
2	INSPECT WIRING HARNESS BETWEEN DRIVER-SIDE BUCKLE SWITCH AND GROUND 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 .) Inspect the wiring harness between driver-side front buckle switch terminal H (manual seat) or terminal C (power seat) and ground for the following: Short to power supply Open circuit Is the wiring harness normal?	Yes	Go to the next step.
2		No	Replace the wiring harness.
3	INSPECT WIRING HARNESS BETWEEN DRIVER-SIDE BUCKLE SWITCH 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 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 2T and driver-side front buckle switch terminal A for the following: Short to ground Short to power supply Open circuit Is the wiring harness normal?	Yes	[Present malfunction diagnosis] Replace the driver-side front buckle. (See FRONT BUCKLE REMOVAL/INSTALLATION .) If the DTC is displayed even after the buckle switch is replaced, replace the SAS control module. (See SAS CONTROL MODULE REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM] .) [Past malfunction diagnosis] DTC troubleshooting completed.
3		No	Replace the wiring harness.