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Inflatable Restraint Steering Wheel Module Coil Centering

    Fig 1: View Of Block Tooth Of Steering Shaft Assembly In 12 O'clock Position
    GM293254Courtesy of GENERAL MOTORS CORP.
    NOTE: The new SIR coil assembly will be centered. Improper alignment of the SIR coil assembly may damage the unit, causing an inflatable restraint malfunction.
  1. Verify the following conditions before centering the SIR coil :
    • The wheels on the vehicle are pointed straight ahead.
    • The block tooth (1) of the steering shaft is in the 12 o'clock position.
    • The ignition switch is in the LOCK position, or J 42640  is installed in the upper tilt head. See Special Tools .
    2. Fig 2: Centering SIR Coil (Without Centering Window, Without Spring Service Lock)
    GM603739Courtesy of GENERAL MOTORS CORP.
  2. If the front side (3) of the SIR coil does NOT have a centering window, and the back side (2) does NOT have a spring service lock (1), perform the following steps:
    1. Hold the coil with the face up.
    2. Rotate the coil hub clockwise until the coil ribbon stops.
    3. Rotate the coil hub, slowly, counter clockwise, for 2.5 revolutions. This is center position.
    4. While maintaining the coil hub in center position, align the centered SIR coil with the horn tower and slide onto the steering shaft.
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