Battery and Electrical Test Equipment

Make Sure The Ignition Is Switched OFF When:
- Disconnecting fuel injection system wiring
- Connecting or disconnecting test equipment leads 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.

BEFORE disconnecting the battery:
- Stop the engine.
- Make sure the ignition is switched OFF (also applies when connecting the battery). Failure to do so may damage the Engine Control Module (ECM).
- Before disconnecting the battery determine the correct coding for the anti-theft radio.

Make Sure The Battery Negative (-) Cable Is Disconnected When:
- Working on the electrical system
- Resistance (spot) welding or electric arc welding anywhere on the vehicle.

When Connecting And Disconnecting Electrical Test Equipment (LED voltage tester, multimeter, etc.):
- Make sure the ignition is switched OFF.
- Use correct adapters from the VW1594 connector test kit.