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Home >> Ford >> 1996 >> Aerostar Van Window >> Repair and Diagnosis >> External Pages >> Different car >> Section 244 (Supplemental Inflatable Restraint System - Air Bag Restraint System) >> Diagnostic Tests >> DTC B1935 - Low Resistance Or Short In Passenger-Side Air Bag Circuit

DTC B1935 - Low Resistance Or Short In Passenger-Side Air Bag Circuit

WARNING: This page is about a different car, the 1996 Ford Ranger and 1996 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Before proceeding, see SERVICE PRECAUTIONS . After servicing has been performed, recheck AIR BAG warning light. If system is okay, install air bag modules and reactivate air bag system.

  1. Verify Condition

    Connect NGS tester to DLC. Perform ON-DEMAND SELF-TEST. If DTC B1935 is retrieved, go to step 2). If DTC B1935 is not retrieved, go to step 4).
    NOTE: In the following step, it may be helpful to inspect clockspring-to-main wiring harness connector for an example of a normal shorting bar.

  2. Measure Resistance

    Deactivate air bag system. See COMPLETE SYSTEM DEACTIVATION under DISABLING & ACTIVATING AIR BAG SYSTEM . Connect NGS to DLC. Perform ON-DEMAND SELF-TEST. If DTC B1935 is retrieved, go to next step. If DTC B1935 is not retrieved, examine shorting bars on passenger-side air bag connector. Replace passenger-side air bag module if shorting bars are normal. Go to step 7).
    NOTE: In the following step, it may be helpful to inspect clockspring-to-main wiring harness connector as an example of a normal shorting bar.

  3. Check For Open Circuit

    Disconnect air bag simulator from main harness. Disconnect air bag diagnostic monitor. Set ohmmeter to highest scale (200 ohms or AUTO). Remove plastic locking wedge from Gray harness connector at air bag diagnostic monitor. See Figure. Measure resistance between diagnostic monitor harness connector terminals C1-4 and C1-5. If resistance is infinite, examine shorting bars on air bag diagnostic monitor connector. Replace air bag diagnostic monitor if shorting bars are normal. Reconnect system. Verify system and go to step 7). If resistance is not infinite, repair short between circuits 607 (Light Blue/Orange wire) and 616 (Pink/Black wire). Reconnect system. Verify system. Reactivate system. Go to step 7).

  4. Check For DTC Service

    Deactivate system. See COMPLETE SYSTEM DEACTIVATION under DISABLING & ACTIVATING AIR BAG SYSTEM . If DTC B1935 has just been repaired, go to step 7). If DTC B1935 has not just been repaired, go to next step.

  5. Check Shorting Bars

    Disconnect air bag diagnostic monitor. Set ohmmeter to lowest scale (200K ohms or AUTO). Zero ohmmeter by touching leads together and record reading. Remove plastic locking wedge from Gray harness side connector at base of steering column. See Figure. Measure resistance between diagnostic monitor harness connector terminals C-4 and C-5 while wiggling wires at passenger-side air bag module connector where it mates to harness. Subtract reading found when zeroing ohmmeter. If resistance is less than 0.7 ohms or other problems are noted, repair problems and go to step 7). If resistance is more than 0.7 ohms, go to next step.

  6. Check Circuits 607 and 616

    Inspect wiring and connections in circuits 607 (Light Blue/Orange wire) and 616 (Pink/Black wire) for poor crimps, corrosion, etc. that could cause high resistance. If problems are noted, repair problems and go to step 7). If no problems are noted, re-examine fault code and look for causes for intermittent faults. Correct any intermittent faults and go to step 7).

  7. Check For Other DTCs

    Connect NGS to DLC. If other DTCs are retrieved go to proper DTC test. If no other DTCs are retrieved, reactivate system and clear all DTCs.
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