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 MANUALSMAZDA1990626 L4-2184CC 2.2L SOHC F2REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTHROTTLE FULL CLOSE SWITCHTESTING AND INSPECTIONWITH AUTOMATIC TRANSAXLE (ATX)
1990 Mazda 626 L4-2184cc 2.2L SOHC F2
With Automatic Transaxle (ATX)
1990 Mazda 626 L4-2184cc 2.2L SOHC F2SECTION With Automatic Transaxle (ATX)
Idle Switch Testing:
1. Disconnect idle switch connector.
2. Check continuity between switch and ground. There should be continuity with throttle valve fully closed and no continuity with throttle open.
3. If not as specified, check condition of idle switch wiring harness. If idle switch is determined defective, replace idle switch and throttle body as a unit.
Idle switch input signal can be checked at ECU terminal 1T with ignition "ON." With accelerator pedal released, terminal voltage should be below 0.5V. With pedal depressed, voltage should be above 7.7V.
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.