Possible Causes
WARNING: This page is about a different car, the 2004 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
Poor connection between left seat belt buckle switch and SAS control module, open or short circuit in wiring harness between left seat belt buckle switch and SAS control module, left seat belt buckle switch malfunction or SAS control module malfunction.
- Inspect left seat belt buckle switch circuit
Using scan tool, inspect PID/DATA monitor DR-BUKL. See PID/DATA MONITOR & RECORD under DIAGNOSTICS. If PID readings are normal and performing present malfunction diagnosis, replace SAS control module. See SAS CONTROL MODULE under REMOVAL & INSTALLATION. If PID readings are normal and performing past malfunction diagnosis, test is complete. If readings are not normal, go to next step. - Inspect left seat belt buckle switch
Turn ignition switch to LOCK position. Disable air bag system. See DISABLING SYSTEM under DISABLING & ACTIVATING AIR BAG SYSTEM. Disconnect left seat belt buckle switch connector. Perform seat belt buckle switch inspection. See SEAT BELT BUCKLE SWITCH INSPECTION under COMPONENT TESTING. If left seat belt buckle switch tests normal, go to next step. If left seat belt buckle switch does not test normal, replace seat belt buckle switch. See SEAT BELT BUCKLE SWITCH under REMOVAL & INSTALLATION. - Inspect wiring harness between left seat belt buckle switch & ground
Measure between ground and left seat belt buckle switch connector terminal "C" or "H" for short to power or open. See Fig 1 . If short to power or open is detected, replace wiring harness. If wiring harness is okay, go to next step. - Inspect wiring harness between left seat belt buckle switch & SAS control module
Remove steering column cover and disconnect clockspring connector. Remove glove box and disconnect passenger-side air bag module connectors. Disconnect right and left side air bag module connectors. See SIDE AIR BAG MODULE under REMOVAL & INSTALLATION. Disconnect right and left side curtain air bag module connectors. See SIDE CURTAIN AIR BAG MODULE under REMOVAL & INSTALLATION. Remove right and left rear door lower trims and disconnect seat belt pretensioner connectors. See SEAT BELT PRETENSIONER under REMOVAL & INSTALLATION. Partially peel back floor covering and disconnect all SAS control module connectors. Measure for short to ground, short to power or open circuit between SAS control module connector No. 2, terminal No. 2T and left seat belt buckle switch connector terminal "D" or "G". See Figure & Fig 1 . If short to ground, short to power or open circuit is detected, replace wiring harness. If wiring harness is okay and performing present malfunction diagnosis, replace SAS control module. If wiring harness is okay and performing past malfunction diagnosis, test is complete.