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

Switching Solenoid Valve Signal Check

  1. Warm engine to normal operating temperature. Connect tachometer to engine. Connect voltmeter to switching solenoid valve connector terminals.
  2. Disconnect throttle sensor connector and connect a jumper wire between terminals "A" and "C" of connector. Start engine and run at 2000 RPM. Slowly decrease engine speed and watch voltmeter.
  3. Current should stop flowing to switching valve terminal when engine speed is 1000-1200 RPM. Disconnect No. 1 water temperature switch (located behind alternator) and connect a jumper wire between both terminals in connector.
  4. Fully pull out choke knob; current should not flow to switching valve terminal. Push choke knob back in. Remove jumper wire from throttle sensor connector and reconnect connector.
  5. Slowly increase engine speed from idle (with throttle) and watch voltmeter. Current should not flow to switching valve at any speed. Quickly accelerate engine; current should flow to switching valve. If switching valve does not respond as outlined, replace switching solenoid valve.
    Fig 1: Testing Switching Solenoid Valve
    G09323257Courtesy of MAZDA MOTORS CORP.
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

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.