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.
2006 Lexus SC 430FACTORY OEM SERVICE PROCEDURE
Waveform 12
- Knock sensor
WAVEFORM SPECIFICATIONS
| Symbols (Terminal No.) | KNKL (E3-1), KNKR (E3-2) - Body ground |
| Tester Range | 1 V/DIV, 20 msec./DIV |
| Condition | Maintain engine RPM at 4,000 rpm after engine warmed-up |
HINT:
- The wavelength becomes shorter as engine rpm increases.
- The waveforms and amplitudes displayed differ slightly depending on the vehicle.
Factory Service Tools
Use the Manual With the Right Hardware
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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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