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Home >> Mazda >> 2004 >> RX-8 1.3 3 >> Repair and Diagnosis >> External Pages >> Different car >> Section 85 (Air Bag System) >> Diagnostic Tests >> Test F: Right Seat Belt PRETENSIONER Circuit Resistance High Or Low, Short To Power Or Short To Ground >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

Open or short circuit in wiring harness between right seat belt pretensioner and SAS control module, right seat belt pretensioner malfunction or SAS control module malfunction.

  1. Inspect right seat belt pretensioner

    Using scan tool, inspect resistance for PID/DATA monitor PS-PTENS. See PID/DATA MONITOR & RECORD  under DIAGNOSTICS. If resistance is 1.5-3.1 ohms and performing present malfunction diagnosis, replace SAS control module. See SAS CONTROL MODULE  under REMOVAL & INSTALLATION. If resistance is 1.5-3.1 ohms and performing past malfunction diagnosis, test is complete. If resistance is not 1.5-3.1 ohms, go to next step.

  2. Inspect right seat belt pretensioner connector

    Turn ignition switch to LOCK position. Disable air bag system. See DISABLING SYSTEM  under DISABLING & ACTIVATING AIR BAG SYSTEM. Remove right lower B-pillar trim panel. Disconnect and inspect right seat belt pretensioner connector. If right seat belt pretensioner connector is cracked or chipped, replace wiring harness. If right seat belt pretensioner connector is not cracked or chipped, go to next step.

  3. Isolate malfunction

    Connect leads of 2 ohm resistor across terminals of right seat belt pretensioner 2-pin connector. Connect negative battery cable. Turn ignition switch to ON position. Using scan tool, inspect PID/DATA monitor PSB-P-ST. If PID readings are normal, replace right seat belt pretensioner. See SEAT BELT PRETENSIONER  under REMOVAL & INSTALLATION. If PID readings are not normal, replace wiring harness and go to next step.

  4. Inspect SAS control module

    Turn ignition switch to LOCK position. Disable air bag system. Connect right seat belt pretensioner connector. Connect negative battery cable. Retrieve Diagnostic Trouble Codes (DTCs). See RETRIEVING DIAGNOSTIC TROUBLE CODES (DTCS)  under DIAGNOSTICS. If DTCs B1881, B1882, B1883 or B1886 are retrieved and performing present malfunction diagnosis, replace SAS control module. If DTCs B1881, B1882, B1883 or B1886 are retrieved and performing past present malfunction diagnosis, test is complete. If DTCs B1881, B1882, B1883 or B1886 are not retrieved, test is complete.
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