GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2002 🢒 Eldorado 🢒 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: 235746 Size: SH
  1. Disable the SIR system. Refer to Disabling the SIR System .
  2. Remove the radiator support cover.
  3. Removal of radiator support cover will expose the inflatable restraint front end discriminating sensor (3) which is located behind the hood hinge (1).
  4. Remove the Connector Position Assurance (CPA) (5) from the inflatable restraint front end discriminating sensor harness connector (4).

    5. Object Number: 235743 Size: SH
  5. Disconnect the inflatable restraint front end discriminating sensor harness connector (4) from the inflatable restraint front end discriminating sensor (3).

    6. Object Number: 235736 Size: SH
  6. Remove the inflatable restraint front end discriminating sensor mounting fasteners (2).
  7. Remove the inflatable restraint front end discriminating sensor (3) from the radiator support.

Installation Procedure

    Object Number: 235736 Size: SH
  1. Install the inflatable restraint front end discriminating sensor (3) to the radiator support.

    2. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  2. Install the inflatable restraint front end discriminating sensor mounting fasteners (2).

    3. Tighten
    Tighten fastener to 11 N·m  (98 lb in).


    Object Number: 235743 Size: SH
  3. Connect the inflatable restraint front end discriminating sensor harness connector (4) to the inflatable restraint front end discriminating sensor (3).

    4. Object Number: 235746 Size: SH
  4. Install the Connector Position Assurance (CPA) (5) to the inflatable restraint front end discriminating sensor harness connector (4).
  5. Install the radiator support cover.
  6. Enable the SIR system. Refer to Enabling the SIR System .