Symptoms

- Engine Light ON (or Service Engine Soon Warning Light)

Possible Causes

- IMTV signal circuit open, shorted to power or ground. - Damaged IMTV actuator. - Damaged PCM.

When Detected

The ECM has detected an improper signal from the IMTV

Description

The Intake Manifold Tuning Valve (IMTV) system is monitored for failure during continuous, key ON engine OFF or key ON engine running self-test. The test fails when the signal on the monitor pin is more or less than an the expected calibrated range