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.
12 13 ... Checking Secondary Signal For Stationary Ignition Distribution
For Special Tool identification, see SPECIAL TOOLS - M3 .
Special Tools Required:
- 12 7 030
Engine Test Step 10
Remove ignition coil. Clip Special Tool 12 7 030 on relevant ignition coil to be tested. Clip high tension clip around ignition lead.
Connect earth lead of adapter to vehicle earth and ignition coil.
Connect up diagnosis connector.
If trigger signal is not present (terminal 1), connect black clip of universal adapter cable to pin 1 of primary adapter cable.
Produce a stationary signal by pressing key R on the tester.
NOTE: Neighboring ignition leads could produce interference on the screen of the oscilloscope.
Refer to the fault memories of engine control units for additional troubleshooting.
Interrogate fault memory and its fault reports, refer to appropriate article.
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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