Variable Induction Control Actuator: Description and Operation

Fig. 18 Short Runner Valve (SRV):

[1][2]SHORT RUNNER VALVE ([1][2]SRV)
It is a manifold tuning system consisting of a solenoid, vacuum actuator, and intake runner butterfly valve integrated within intake manifold (Fig. 18). Vacuum is supplied from the speed control vacuum reservoir.

The [1][2]SRV system operates under WOT conditions above 5000 rpm to maximize engine performance. When actuated by the PCM, the SRV solenoid energizes, allowing mechanical linkage to redirect the intake air flow to six short runners. The PCM looks for a current spike when actuating the solenoid. If the spike is not present, the PCM sets the DTC.