Impact Sensor & Wiring Harness Test
WARNING: This page is about a different car, the 1996 Subaru SVX. However, it is still accessible from the selected car via links, so may be relevant.
- Disable SRS. See DISABLING & ACTIVATING AIR BAG SYSTEM . Remove lower trim panel. Unplug air bag module 3-pin Yellow connector at base of steering column. See Figure . Unplug 2-pin Orange connector AB5 (left sensor) and Blue connector AB4 (right sensor) from control unit. See Figure . Plug AB5 and AB4 into connector 8B of test harness "B2". See Figure .
- Measure resistance between terminals No. 15 and 16 at connector 5B of test harness "B2". If resistance is not 1400-1600 ohms, front left impact sensor and/or wiring harness is defective. Replace left impact sensor or wiring harness as appropriate.
- If resistance is 1400-1600 ohms, measure resistance between terminals No. 17 and 18 at connector 5B of test harness "B2". If resistance is not 1400-1600 ohms, front right impact sensor and/or wiring harness is defective. Replace right impact sensor or wiring harness as appropriate.
- If resistance is 1400-1600 ohms, measure resistance between ground and terminals No. 15 and 16 at connector 5B of test harness "B2". If resistance is less than 200 ohms at either terminal, front left impact sensor and/or wiring harness is defective. Replace left impact sensor or wiring harness as appropriate.
- If resistance is 200 ohms or more at both terminals No., measure resistance between ground and terminals No. 17 and 18 at connector 5B of test harness "B2". If resistance is less than 200 ohms at either terminal, right impact sensor and/or wiring harness is defective. Replace right impact sensor or wiring harness as appropriate. If resistance is 200 ohms or more at both terminals No., go to AIR BAG MODULE CHECK.