Inflatable Restraint Front End Discriminating Sensor Replacement

REMOVAL PROCEDURE




1. Disable the SIR system.
2. Disconnect the Mass Air Flow (MAF) and the Intake Air Temperature (IAT) sensors harness connectors.
3. Loosen the clamp.
4. Remove the air tube from the throttle body air intake cover.
5. Remove the bolts.
6. Remove the upper radiator shroud.
7. Remove the fan and clutch assembly.
8. Remove the lower radiator shroud.
9. Disconnect the inflatable restraint front end discriminating sensor harness connector located at the top of the cradle (1).
10. Remove the bolts (2).
11. Remove the inflatable restraint front end discriminating sensor (3) from the cradle.

INSTALLATION 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.




1. Install the inflatable restraint front end discriminating sensor to the top of the cradle.

NOTE: Refer to Fastener Notice in Service Precautions.

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

Tighten
Tighten fastener to 6.5 N.m (58 lb in).

IMPORTANT: The following procedures should be utilized in the event that sensor mounting holes or fasteners are damaged to the extent that the sensor may no longer be properly mounted.

3. Perform the following steps in order to complete the first fastener repair:
3.1. Remove and discard the improperly installed rivet.
3.2. Reattach sensor with new rivet (GM P/N 15715058) or equivalent.
4. Perform the following steps, if needed in order to complete a second fastener repair:
4.1. Remove the improperly installed rivet.
4.2. Enlarge the mounting holes in the lower radiator support to 9.0 mm (0.35 in).
4.3. Insert and properly seat rivnut (GM P/N 15699834) or equivalent.
4.4. Install sensor with screw GM P/N 11515664, or equivalent.

Tighten
Tighten fasteners to 6.5 N.m (58 lb in).

5. Connect the inflatable restraint front end discriminating sensor harness connector to the sensor.
6. Install the lower radiator shroud.

7. Install the fan and clutch assembly.
8. Install the upper radiator shroud.
9. Install the air box with MAF sensor to the upper radiator shroud.
10. Connect the air tube to the throttle body air intake cover with the clamp.
11. Connect the MAF and IAT sensors harness connectors.
12. Enable the SIR system.