Intake Air Heater Relay: Description and Operation

INTAKE MANIFOLD AIR HEATER RELAYS - ECM OUTPUT

Fig. 15 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. 15).

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

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