Important: The intake air heater (IAH) relay is part of the glow plug controller on vehicles equipped with federal emissions.

1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
2. Remove the engine cover. Refer to Engine Cover Replacement in Interior Trim.
3. Remove the air cleaner layer. Refer to Air Cleaner Replacement .



4. Using a flat bladed screwdriver, disengage the glow plug controller cover clips.



5. Remove the glow plug controller cover.



6. Remove the glow plug controller nuts.



7. Lift the glow plug controller off the studs.



8. Separate the intake heater relay from the glow plug controller housing by inserting a small screwdriver between them while prying the relay assembly outward.



9. Slide the intake heater relay outward to disengage it from the glow plug controller housing.



10. Using a flat bladed screwdriver, disengage the intake heater relay clip.



11. Remove the intake heater relay.

1. Install the intake heater relay.



2. Slide the intake heater relay inward to engage it to the glow plug controller housing.



3. Place the glow plug controller onto the studs.

Notice: Refer to Fastener Notice in the Preface section.




4. Install the glow plug controller nuts.

Tighten
Tighten the nuts to 42 N·m (31 lb ft).




5. Install the glow plug controller cover.
6. Install the air cleaner layer. Refer to Air Cleaner Replacement .
7. Install the engine cover. Refer to Engine Cover Replacement in Interior Trim.
8. Connect the negative battery cables. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.