Safety Precautions

2012 Volkswagen Jetta TDI, 4D Sedan, Standard TransSECTION Safety Precautions
WARNING: This page is about a different variant/trim than selected.

To reduce the risk of personal injury and/or damage to the fuel injection and ignition system, always observe the following:

  • Do not touch or remove the ignition coil or the ignition wires when engine is running or turning at starter speed.
  • Only disconnect and reconnect wires for injection and ignition system, including test leads, if ignition is turned off.

If engine is to be cranked at starting RPM without starting:

-- Disconnect the connector -arrow- from the ignition coil.

Fig 1: Identifying Ignition Coil Electrical Harness Connector
GWWM15-0012Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

If special testing equipment is required during road test, note the following:

  • Testing and measuring equipment must always be secured to the rear seat and be operated from there by a second person.

If the vehicle is involved in a collision while testing and measuring equipment is operated from the front passenger seat, the person sitting in that seat could be seriously injured when the airbag deploys.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.