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 MANUALSMAZDA1999626 ES, 2.5 D, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 403 (ENGINE CONTROL SYSTEM)KNOCK SENSOR INSPECTIONRESISTANCE INSPECTION
1999 Mazda 626 ES, 2.5 D, Standard
Resistance Inspection
1999 Mazda 626 ES, 2.5 D, StandardSECTION Resistance Inspection
WARNING: This page is about a different car, the 2005 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
- Turn the ignition switch to LOCK.
- Disconnect the knock sensor connector.
- Measure the resistance between the knock sensor terminals A and B.
- If not as specified, replace the knock sensor.
- If the knock sensor is okay, but PID value or PCM terminal 3 and 81 voltage are out of specification, perform the CIRCUIT OPEN/SHORT INSPECTION .
Specification
- Approx. 560 kilohms (20 °C {68 °F})
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.