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 (Service and Repair).
2. Remove the charge air cooler outlet pipe. Refer to Charged Air Cooler Hoses/Pipes Replacement (Inlet) (Charged Air Cooler Hoses/Pipes Replacement (Inlet))Charged Air Cooler Hoses/Pipes Replacement (Outlet) (Charged Air Cooler Hoses/Pipes Replacement (Outlet)).
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 intake air valve bolts and valve.




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. Position the intake air valve to the IAH and install the intake air valve bolts and tighten to 20 Nm (15 lb ft).




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 the intake air heater (IAH).
6. Install the charge air cooler outlet pipe. Refer to Charged Air Cooler Hoses/Pipes Replacement (Inlet) (Charged Air Cooler Hoses/Pipes Replacement (Inlet))Charged Air Cooler Hoses/Pipes Replacement (Outlet) (Charged Air Cooler Hoses/Pipes Replacement (Outlet)).
7. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (Service and Repair).