Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMAZDA1991RX-7 BASE, 2D CONVERTIBLE, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - SYSTEM/COMPONENT TESTSEMISSION SYSTEMS & SUB-SYSTEMSRELIEF SOLENOID VALVE SIGNAL CHECK
1991 Mazda RX-7 Base, 2D Convertible, Standard
Relief Solenoid Valve Signal Check
1991 Mazda RX-7 Base, 2D Convertible, StandardSECTION Relief Solenoid Valve Signal Check
- Install tachometer. Warm engine to normal operating temperature. Allow engine to idle. Connect Checker Light (49 F018 001) to Green check connector. Check connector is located near air filter on non-turbo models and near intercooler on turbo models. See Fig 1 .
- Remove relief solenoid valve-to-air control valve hose at air control valve. Cover valve port with finger. Note that Green checker light activates and air flows at designated areas. See GREEN CHECKER LIGHT OPERATION table.
- Remove right seat and floor mat. Disconnect heat hazard sensor connector. Install jumper wire to terminals of heat hazard sensor harness connector (ECU side). Ensure Green checker light does not activate and air flows from valve port at any engine speed. Remove jumper wire. Install connector at heat hazard sensor.
- Start engine. Increase engine speed, noting that Green checker light does not activate and air flows from valve port when engine speed exceeds 1000-1200 RPM.
NOTE:
Checker light may occasionally turn off at approximately 1200 RPM.
GREEN CHECKER LIGHT OPERATION
| Engine Condition | Air Flow | Light Operation |
|---|---|---|
| Idle | No | On |
| Non-Turbo (More Than 3600 RPM) | Yes | Off |
| Turbo (More Than 4000 RPM) | Yes | Off |
| Deceleration | No | On |
RENDER: 1.0x
NO RELATED
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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.