1982 Mazda RX-7 GSL, Automatic TransFACTORY OEM SERVICE PROCEDURE

Shutter Solenoid Valve Signal Check

  1. 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.
  2. Disconnect throttle sensor electrical connector (Black/Yellow and Green/Black wires). Shift automatic transmission into "P" or "N". Start engine and run at idle.
  3. 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.
    Fig 1: Testing Shutter Solenoid Valve Signal
    G09323263Courtesy of MAZDA MOTORS CORP.
  4. On automatic transmissions, shift into "P" or "N". Current should 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 RX7 Auxiliary Control Device," article in this section. Also check relief solenoid and switching solenoid valves as described in "Mazda RX7 Air Injection System," article in this section.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.