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.
TDC Transmitter
An additional inductive sensor located on top of the clutch bell housing sends out one TDC signal for each engine revolution. The TDC signal produced by the sensor is sent directly to a test connection.
Test connection should be used in order to be able to accurately check ignition timing and engine speed, and to exclude erroneous testing with a stroboscope test light.
This requires using a tester with a separate TDC transmitter connection. When connecting these testers it is important that cylinder No. 1 ignition lead is also connected and tester is set to 4 cylinders.
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.