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 MANUALSLEXUS1999RX 300 AWD V6-3.0L (1MZ-FE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMKNOCK SENSORTESTING AND INSPECTION
1999 Lexus RX 300 AWD V6-3.0L (1MZ-FE)
Knock Sensor: Testing and Inspection
1999 Lexus RX 300 AWD V6-3.0L (1MZ-FE)SECTION Testing and Inspection
KNOCK SENSOR INSPECTION
Using an ohmmeter, check that there is no continuity between the terminal and body. If there is continuity, replace the sensor.
Using an ohmmeter, check that there is no continuity between the terminal and body. If there is continuity, replace the sensor.
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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.