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.
2003 Mazda 6 L4-2.3LFACTORY OEM SERVICE PROCEDURE
Oscilloscope Patterns and Waveforms
Inspection Using An Oscilloscope (Reference)
VSS signal
PCM terminals
2I(+) - 2AC(-)
Oscilloscope setting
1 V/DIV (Y), 10 ms/DIV (X), DC range
Vehicle condition
Drive the vehicle with approx. 10 km/h {6.2 mph}
VSS signal
PCM terminals
2I(+) - 2AC(-)
Oscilloscope setting
1 V/DIV (Y), 10 ms/DIV (X), DC range
Vehicle condition
Drive the vehicle with approx. 10 km/h {6.2 mph}
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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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