Intake Air Heater Relay: Description and Operation

Fig.29 Intake Manifold Air Heater Relays Location:

The 2 intake manifold air heater relays are located in the engine compartment, attached to the left inner fender below the left battery (Fig. 29).

The Engine Control Module (ECM) operates the 2 heating elements through the 2 intake manifold air heater relays.

Refer to Powertrain Diagnostic Procedures for an electrical operation and complete description of the intake heaters, including pre-heat and post-heat cycles.