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Home >> Ford >> 1996 >> Aerostar Van Window >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Air Bag Restraint System >> Diagnostic Tests >> Code 45 - Center Front Impact Sensor Not Mounted To Vehicle Properly >> Test Procedure

Test Procedure

  1. Verify Condition

    Turn ignition on. Check for fault codes. If Code 45 is flashing, go to step 2). If Code 45 is not flashing, check connectors, wiring, splices, and crimps for an intermittent problem. DO NOT proceed with diagnostic test unless code is flashing. Doing so will result in needless replacement of system components.

  2. Deactivate System

    Deactivate air bag system. See DISABLING & ACTIVATING AIR BAG SYSTEM  . Leave positive battery cable disconnected. Disconnect diagnostic monitor. Diagnostic monitor is located on left side of steering column under instrument panel. Set ohmmeter to 200 ohms scale. Measure resistance between terminals No. 21 (Purple/Light Blue wire) and No. 3 (Black/White wire) of diagnostic monitor connector. See Figure . If resistance is more than 2 ohms, go to step 3). If resistance is less than 2 ohms, replace diagnostic monitor.

  3. Check Front Center Impact Sensor Ground

    Disconnect center front impact sensor. Measure resistance between Purple/Light Blue wire in sensor connector and ground. If resistance is less than 2 ohms, inspect circuit between terminal No. 21 and sensor. Also, check all terminal crimps and splices. Repair as necessary. If resistance is more than 2 ohms, remove sensor. Clean sensor mounting surfaces. Reinstall sensor. Go to step 4).

  4. Measure Resistance Of Sensor Ground

    Measure resistance between Purple/Light Blue wire in impact sensor connector and ground. If resistance is less than 2 ohms, circuit is okay. Cleaning sensor mounting surfaces in step 3) corrected the problem. If resistance is more than 2 ohms, replace center front impact sensor.
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