Manifold Tune Valve Solenoid Circuit

Name of Code:
Manifold Tune Valve (MTV) Solenoid Circuit

When Monitored:
With the ignition key on and engine running.

Set Condition:
The MTV solenoid control circuit is not in the expected state when requested to operate by the PCM.

Theory of Operation:
The MTV solenoid is actuated by the PCM at wide open throttle and below 3,008 engine rpm. This solenoid controls a manifold mounted servo that power tunes the manifold. The PCM looks for a current spike when actuating the solenoid. If the spike is not present the PCM sets a trouble code.

Possible Causes:
- Open or shorted control circuit
- Open fused ignition switch output circuit
- Open or shorted solenoid control coil
- Powertrain control module failure