Envoy, Rainer, Trailblazer 2006-2007

Clockspring (Coil)

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Centering




WARNING
A new inflatable restraint steering wheel module coil is pre-centered. Do not remove the centering tab from the new inflatable restraint steering wheel module coil until installation is complete.


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.



Click image to see an enlarged view

Fig. Verify that the block tooth (1) of the steering shaft assembly is in the 12 o'clock position

  1. Verify the following conditions before centering the SIR coil:

    The wheels on the vehicle are straight ahead
     
    The block tooth (1) of the steering shaft assembly is in the 12 o'clock position
     
    The ignition switch assembly is in the LOCK position

    Click image to see an enlarged view

    Fig. Spring service lock (1), back side (2), alignment arrows (3), centering window (4) and front (5) of the SIR coil

     

  2.  
  3. If the front (5) of the SIR coil has a centering window (4), and the back side (2) has a spring service lock (1), perform the following steps:
    1. Hold the coil with the face up.
    2.  
    3. While depressing the spring service lock, rotate the coil hub clockwise until the coil ribbon stops.
    4.  
    5. Rotate the coil hub slowly, counterclockwise, until the centering window appears yellow and both arrows (3) line up.
    6.  
    7. Release the spring service lock between the locking tab. The SIR coil is now centered.
    8.  
    9. Align the centered SIR coil with the horn tower and slide onto the steering shaft assembly.

      Click image to see an enlarged view

      Fig. Back side (1), alignment arrows (2), centering window (3) and front (4) of the SIR coil

    10.  

  4.  
  5. If the front (4) of the SIR coil has a centering window (3) and the back side (1) has NO spring service lock, perform the following steps:
    1. Hold the coil with the face up.
    2.  
    3. Rotate the coil hub clockwise until the coil ribbon stops.
    4.  
    5. Rotate the coil hub slowly, counterclockwise until the centering window appears yellow and both arrows (2) line up. This is the CENTER position.
    6.  
    7. While holding the coil hub in the CENTER position, align the coil with the horn tower and slide the coil onto the steering shaft assembly.

      Click image to see an enlarged view

      Fig. Spring service lock (1), back side (2), front side (3) and directional arrow (4) of the SIR coil

    8.  

  6.  
  7. If no centering window is present on the front side (3) of the SIR coil, but a spring service lock (1) is on the back side (2), perform the following steps:
    1. Hold the coil with the back side up.
    2.  
    3. While depressing the spring service lock, rotate the coil hub in the direction of the arrow (4) until the coil ribbon stops.
    4.  
    5. Still pressing the spring service lock, rotate the coil hub in the opposite direction 2½ revolutions.
    6.  
    7. Release the spring service lock between the locking tabs. The SIR coil is now centered.
    8.  
    9. Align the centered coil with the horn tower and slide the coil onto the steering shaft assembly.

      Click image to see an enlarged view

      Fig. Back side (1), front side (2) and directional arrow (3) of the SIR coil

    10.  

  8.  
  9. If no centering window appears on the front side (2) of the SIR coil and no spring service lock exists on the back side (1), perform the following steps:
    1. Hold the coil with the face up.
    2.  
    3. Rotate the coil hub in the direction of the arrow until the coil ribbon stops.
    4.  
    5. Rotate the coil hub, slowly, counterclockwise, for 2½ revolutions. This is the CENTER position.
    6.  
    7. While maintaining the coil hub in the CENTER position, align the centered coil with the horn tower and slide the coil onto the steering shaft assembly.
    8.  

  10.  

 
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