Intake Air Heater: Service and Repair

Intake Air Heater Replacement

Removal Procedure





1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection Battery Negative Cable Disconnection and Connection.

2. Remove the charge air cooler outlet pipe. Refer to Charge Air Cooler Outlet Pipe Replacement Charge Air Cooler Outlet Pipe Replacement.

3. Disconnect the engine wiring harness electrical connector (1) from the intake air heater (IAH).

4. Disconnect the engine wiring harness electrical connector (2) from the intake air valve.

5. Remove the nut and the positive battery cable from the IAH.





6. Remove the throttle body assembly. Refer to Throttle Body Assembly Replacement Service and Repair.





7. Remove the IAH and remove and discard the IAH gasket.

Installation Procedure





1. Position a NEW IAH gasket to the intake manifold tube and position the IAH to the intake manifold tube.





Caution:
Refer to Fastener Caution Fastener Caution.

2. Install the throttle body assembly. Refer to Throttle Body Assembly Replacement Service and Repair.





3. Install the positive battery cable and nut to the IAH and tighten to 4 Nm (34 lb in).

4. Connect the engine wiring harness electrical connector (2) to the intake air valve.

5. Connect the engine wiring harness electrical connector (1) from IAH.

6. Install the charge air cooler outlet pipe. Refer to Charge Air Cooler Outlet Pipe Replacement Charge Air Cooler Outlet Pipe Replacement.

7. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection Battery Negative Cable Disconnection and Connection.