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HOMESERVICE MANUALSMAZDA1999626 ES, 2.5 D, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 9 (ENGINE CONTROLS - SYSTEM/COMPONENT TESTS - 2.3L)ENGINE SENSORS & SWITCHESKNOCK SENSOR
1999 Mazda 626 ES, 2.5 D, Standard

Knock Sensor

1999 Mazda 626 ES, 2.5 D, StandardSECTION Knock Sensor
WARNING: This page is about a different car, the 1997 Mazda Millenia. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect knock sensor connector. Using ohmmeter, measure resistance between knock sensor terminal "A" (Red wire) and knock sensor body. Resistance should be about 560,000 ohms at 68°F (20°C). If resistance is not as specified, replace knock sensor.

RENDER: 1.0x

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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.