Safety precautions

WARNING: This page is about a different car, the 1999 Volkswagen Jetta, 1998 Volkswagen Jetta, and 1997 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Fire hazard! Do not have anything in the area that can ignite Diesel fuel. To guard against personal injury, and damage to vehicle components.

Be sure the ignition is switched OFF, when:

Disconnecting or connecting Diesel fuel injection and glow plug system wiring or test equipment
Disconnecting the battery

BEFORE cranking the engine at starting RPM (such as for compression testing):

Disconnect the harness connector for fuel cut-off valve -N109- on the Diesel injection pump.
After the work is completed, check and erase Diagnostic Trouble Code (DTC) memory.

CAUTION: BEFORE disconnecting (or connecting) the battery:

Be sure the ignition is switched OFF. Failure to do so may damage the Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM).
Be sure of the proper radio code (for vehicles equipped with coded anti-theft radio).