Shutter Solenoid Valve Signal Check
- Warm engine to normal operating temperature. Stop engine. Connect tachometer to engine. Connect voltmeter to terminals of shutter solenoid valve electrical connector without disconnecting connector. Disconnect throttle sensor electrical connector (Black/Yellow and Green/Black wires). Shift automatic transmission into "P" or "N".
- Start engine and run at idle. Current should flow to shutter solenoid valve terminals. Disconnect electrical connector from throttle sensor; current should stop flowing to solenoid valve. Shift automatic transmission into "D". Connect throttle sensor connector disconnected in step 1); current should flow to solenoid valve terminals.
- On automatic transmissions, shift into "P" or "N". Current should not flow to solenoid valve terminal at any engine speed. If solenoid valve does not respond as described, replace shutter solenoid valve.NOTE: Before replacing shutter solenoid valve, check auxiliary control unit as outlined in "Mazda Rotary Engine Auxiliary Control Device" article in this section. Also check relief solenoid valve and switching solenoid valve as described in "Mazda Rotary Engine Air Injection System" article in this section.