GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 1998 🢒 Firefly (Canada) 🢒 Restraints 🢒 SIR 🢒 Inflatable Restraint Front End Discriminating Sensor Replacement

Removal Procedure

    Caution: Be careful when you handle a sensor. Do not strike or jolt a sensor. Before applying power to a sensor:

       • Remove any dirt, grease, etc. from the mounting surface.
       • Position the sensor horizontally on the mounting surface.
       • Point the arrow on the sensor toward the front of the vehicle.
       • Tighten all of the sensor fasteners and sensor bracket fasteners to the specified torque value.
    Failure to follow the correct procedure could cause air bag deployment, personal injury, or unnecessary SIR system repairs.


    Object Number: 173094 Size: MH
  1. Disable the SIR system. Refer to Disabling the SIR System .
  2. Disconnect the Connector Position Assurance (CPA) (4) and the electrical connector (1).
  3. Disconnect the pigtail from the pigtail clips.
  4. Remove the inflatable restraint front end discriminating sensor fasteners.
  5. Remove the inflatable restraint front end discriminating sensor (3) from the vehicle.

Installation Procedure

    Object Number: 173094 Size: MH
  1. Install the inflatable restraint front end discriminating sensor (3) in the vehicle. Ensure that the arrow is pointing toward the front of the vehicle.
  2. Install the inflatable restraint front end discriminating sensor fasteners.

    3. Tighten
    Tighten the fasteners to 5.5 N·m (49 lb in).

  3. Connect the pigtail to the pigtail clips.
  4. Connect the electrical connector (1) and the CPA (4).
  5. Enable the SIR system. Refer to Enabling the SIR System .