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 SYSTEMSSENSORS AND SWITCHES - COMPUTERS AND CONTROL SYSTEMSCOOLANT TEMPERATURE SENSOR/SWITCH (FOR COMPUTER)TESTING AND INSPECTION
1990 Mazda 626 L4-2184cc 2.2L SOHC F2
Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection
1990 Mazda 626 L4-2184cc 2.2L SOHC F2SECTION Testing and Inspection
WATER THERMOSWITCH
INSPECTION
1. Remove the Water thermoswitch.
2. Place the switch in water with a thermometer and heat up the water gradually.
3. Check the continuity of the terminals. If necessary, replace the switch.
CONNECTION GUIDE
WATER TEMPERATURE CONTINUITY
Below 65°C (149°F) YES
Above 72 ± 5°C (162 ± 41°F) NO
Testing Water Thermoswitch:
INSPECTION
1. Remove the Water thermoswitch.
2. Place the switch in water with a thermometer and heat up the water gradually.
3. Check the continuity of the terminals. If necessary, replace the switch.
CONNECTION GUIDE
WATER TEMPERATURE CONTINUITY
Below 65°C (149°F) YES
Above 72 ± 5°C (162 ± 41°F) NO
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.