Shutter Valve Actuator Check
Disconnect vacuum hose from actuator. Connect a vacuum pump to actuator. Watch actuator rod and slowly apply vacuum to actuator. See SHUTTER VALVE ACTUATOR CHECK table. If actuator does not operate as specified, replace actuator. If system is not working properly but actuator is okay, check vacuum lines.
SHUTTER VALVE ACTUATOR CHECK
| Application (Vacuum - in. Hg) | Actuator Rod Position | |
|---|---|---|
| Miata 1.8L | ||
| More Than -2.0 | Not Pulled | |
| About -2.7 | Starts To Move | |
| Less Than -10.2 | Fully Pulled | |
| Protege & Protege5 2.0L | ||
| More Than -0.80 | Not Pulled | |
| -2.4 to -10.4 | Starts To Move | |
| Less Than -10.4 | Fully Pulled | |
| 626 2.0L | ||
| More Than -0.39 | Not Pulled | |
| -0.40 to -1.18 | Starts To Move | |
| Less Than -7.47 | Fully Pulled | |
NOTE:
Perform VTCS solenoid check only when directed by SELF-DIAGNOSTICS testing.