Navistar MaxxForce DT Diagnostic Manual page 146

DIAGNOSTIC MANUAL
1. Engine Throttle Valve (ETV)
Figure 39 ETV (MaxxForce® 11 and 13 Engines)
Engine Throttle Valve (ETV)
The Engine Throttle Valve (ETV) controls the flow of fresh air (boosted and cooled) into the engine's air intake
path through the CAC to help heat the exhaust aftertreatment during regeneration, and to assist when heavy
EGR is requested. The electronic portion of the ETV contains a microprocessor that monitors valve position,
electronic chamber temperature, controls the electric motor, and reports diagnostic faults to the ECM. The
ETV changes position in response to ECM signals.
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