Safety Precautions
WARNING:Fuel system is under pressure! Before opening the system place a rag around the connection. Then release pressure by slowly loosening the connection.
- Be alert when working on or near the engine High ignition secondary voltage can cause serious personal injury and damage vehicle components.
- DO NOT touch or disconnect ignition system wires when the engine is running or being cranked at starting RPM.
- DO NOT operate the starter if the fuel injectors have been removed.
- Be sure the ignition is switched OFF, when:
- Disconnecting ignition wires.
- Disconnecting fuel injection system wiring.
- Connecting or disconnecting test equipment lead.
- Disconnecting the battery.
- Washing the engine or engine compartment.
- BEFORE cranking the engine at starting RPM (such as for compression testing) disable the ignition and fuel injection systems.
- Disconnect the ignition coil power output stage.
- Disconnect harness connectors from all fuel injectors.
- After the work is completed, erase Diagnostic Trouble Code (DTC) memory.
CAUTION, Before Disconnecting The Battery:
- Stop the engine.
- Be sure the ignition is switched OFF (also applies when connecting the battery). Failure to do so may damage the Engine Control Module (ECM).
- Be sure of the proper radio code (for vehicles equipped with coded anti-theft radio).
- Be sure the negative battery cable is disconnected when Working on the electrical system.
- Electric arc welding anywhere on the vehicle.
- When connecting and disconnecting electrical test equipment (LED voltage tester multimeter etc.):
- Be sure the ignition is switched OFF
- Use correct adapters from the VW 1594 connector test kit. For any work affecting the Engine Control Module (ECM):
- BEFORE disconnecting the ECM harness connector switch the ignition OFF and WAIT at least 20 seconds. Failure to do so may damage the ECM.
- DO NOT connect any outside voltage source to stimulate an output signal at the ECM.