Ignition System: Service Precautions

2012 Volkswagen CC 4Motion (357) V6-3.6L (CNNA)SECTION Service Precautions





Ignition System

For trouble free operation of the electrical components a voltage of at least 11.5 volts is necessary.

It is possible that the control module will recognize a malfunction and store a Diagnostic Trouble Code (DTC) during some tests. After completing all tests and repairs, the DTC memory should therefore be checked and erased if necessary. Refer to "Guided Functions" in the vehicle diagnostic tester.

If the engine only starts briefly and then turns off again after troubleshooting, repairs or checking of the components, it may be that the immobilizer is blocking the Engine Control Module (ECM). The ECM must then be adapted if necessary. Refer to "Guided Functions" in the vehicle diagnostic tester.

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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.