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Home >> Mazda >> 2013 >> 5 Grand Touring >> Repair and Diagnosis >> External Pages >> Different car >> Section 126 (Air Bag System) >> Diagnostic Tests >> Test R: Left Seat Belt Buckle Switch Circuit Open, Short To Ground, Short To Power Or Resistance Out Of Range >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2004 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.

Left seat belt buckle switch malfunction can be caused by 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.

  1. 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.

  2. Inspect wiring harness between left seat belt buckle switch & ground

    Measure for short to power or open in Brown/Yellow wire between ground and left seat belt buckle switch connector terminal. See WIRING DIAGRAMS  . If short to power or open is detected, replace air bag system wiring harness. If short to power or open is not detected, go to next step.

  3. Inspect wiring harness between left seat belt buckle switch & SAS control module

    Disable air bag system. See DISABLING SYSTEM  under DISABLING & ACTIVATING AIR BAG SYSTEM. Disconnect right and left front seat buckle connectors. Access SAS control module and disconnect connectors. See SAS CONTROL MODULE  under REMOVAL & INSTALLATION. Measure for short to ground, short to power or open circuit in Brown/Yellow wire between SAS control module connector No. 2, terminal No. 2T and left seat belt buckle switch connector. See Figure . If short to ground, short to power or open circuit is detected, replace air bag system wiring harness. If short to ground, short to power or open circuit is not detected and performing present malfunction diagnosis, replace SAS control module. If short to ground, short to power or open circuit is not detected and performing past malfunction diagnosis, test is complete.
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