GM Service Manual Online
For 1990-2009 cars only

Inflatable Restraint Coil Centering - Off Vehicle Column Shift and Floor Shift

Centering Procedure


    Object Number: 293254  Size: SH

    Notice: The new SRS coil assembly will be centered. Improper alignment of the SRS coil assembly may damage the unit, causing a supplemental restraint malfunction.

  1. Verify the following before centering the SRS coil assembly:
  2. • 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 is in the LOCK position or J 42640 is installed in the upper tilt head assembly.

    Object Number: 603737  Size: SH
  3. If the front (5) of the SRS coil assembly has a centering window (4), and on the back side (2) a spring service lock (1), perform the following steps:
  4. 2.1. Hold the coil assembly with the face up.
    2.2. While depressing the spring service lock, rotate the coil hub clockwise until the coil ribbon stops.
    2.3. Rotate the coil hub slowly, counter clockwise, until the centering window appears yellow and both arrows (3) line up.
    2.4. Release spring service lock between the locking tab. The SRS coil is now centered.
    2.5. Align the centered SRS coil assembly with the horn tower and slide onto the steering shaft assembly.

    Object Number: 594558  Size: SH
  5. If the front (4) of the SRS coil has a centering window (3) and no spring service lock on the back side (1), perform the following steps:
  6. 3.1. Hold the coil assembly with the face up.
    3.2. Rotate the coil hub clockwise until the coil ribbon stops.
    3.3. Rotate the coil hub slowly, counter clockwise until the centering window appears yellow and both arrows (2) line up. This is center position.
    3.4. While holding the coil hub in center position, align the SRS coil assembly with the horn tower and slide onto the steering shaft assembly.

    Object Number: 603738  Size: SH
  7. If no centering window is present on the front side (3) of the SRS coil assembly, but a spring service lock (1) is on the back side (2), perform the following steps:
  8. 4.1. Hold the SRS coil assembly with the back side up.
    4.2. While depressing the spring service lock, rotate the coil hub counter clockwise until the coil ribbon stops.
    4.3. Still pressing the spring service lock, rotate the coil hub in the opposite direction 2 ½ revolutions.
    4.4. Release the spring service lock between locking tabs. The SRS coil is now centered.
    4.5. Align the centered SRS coil assembly with the horn tower and slide onto the steering shaft assembly.

    Object Number: 603739  Size: SH
  9. For no centering window on the front side (2) of the SRS coil assembly and no spring service lock on the back side (1), perform the following steps:
  10. 5.1. Hold the coil assembly with the face up.
    5.2. Rotate the coil hub clockwise until the coil ribbon stops.
    5.3. Rotate the coil hub, slowly, counter clockwise, for 2 ½ revolutions. This is center position.
    5.4. While maintaining the coil hub in center position, align the centered SRS coil assembly with the horn tower and slide onto the steering shaft assembly.