Safety precautions

To prevent injuries to persons and/or damage to the fuel injection and ignition system, the following must be noted:

Do not touch or disconnect ignition wiring when the engine is running or being turned at starter speed.
The ignition must be switched off before connecting or disconnecting the injection or ignition system wiring or tester cables.
If the engine is to be turned at starter speed, without starting, (e.g. when checking compression),

Fig 1: Disconnecting 5-Pin Harness Connector From Ignition Coil

Courtesy of VOLKSWAGEN OF AMERICA, INC.

NOTE: Removing fuse 32 interrupts the voltage supply to the fuel injectors.

Fig 2: Identifying Fuse

Courtesy of VOLKSWAGEN OF AMERICA, INC.

Observe the following if test and measuring instruments are required during a road test:

WARNING:

When driving or riding in an airbag -equipped vehicle, NEVER hold the scan tool or other test equipment in your hands or lap while in motion. Objects between you and the airbag increase the risk of injury in an accident.
During a road test in an airbag -equipped vehicle, test equipment must always be fastened to and operated from the rear seat by a second technician.