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.
2005 Toyota Avalon XLSFACTORY OEM SERVICE PROCEDURE
Waveform 4
Knock sensor signal
WAVEFORM 4 REFERENCE CHART
| ECM Terminal Names | Between KNK1 and EKNK, or KNK2 and EKN2 |
| Tester Ranges | 0.01 to 10 V/DIV, 0.01 to 10 msec./DIV |
| Conditions | Engine speed is maintained at 4,000 rpm after engine is warmed up |
HINT:
- The wavelength becomes shorter as the engine rpm increases.
- The waveforms and amplitudes displayed differ slightly depending on the vehicle.
Factory Service Tools
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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.
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