Electrical Testing

Electrical testing





Special tools and equipment
^ V.A.G 1598/21 adapter
^ VW 1594A connector test kit
^ Multimeter (Fluke 83 or equivalent)
^ V.A.G 1921 pliers
^ If On Board Diagnostic (OBD) does not give any indication of the source of the malfunction, carry out all of the electrical test steps.
^ If On Board Diagnostic (OBD) provides a direct indication of the source of the malfunction, only carry out the test steps recommended in the DTC table (specific testing).

Test Requirements
^ Ignition and electrical consumers switched off before beginning the check (headlights, lighting, fan, etc.)
^ Fuses -S9-, -S13-, -S20-, -S178-, -S179- must be OK (remove fuses from fuse holder to check)

Removing air cleaner





- Pull harness connector -2- off Mass Air Flow (MAF) sensor.
- Release spring-type clip on air duct hose -1- using V.A.G 1921 pliers and pull hose off air cleaner.
- Remove air cleaner bolts -3- -4- and take out air cleaner.





- Release control module harness connector (arrow -1-) and pull off (arrow -2-).





^ Pull multi-pin harness connector off ABS control module (w/EDL) -Jl04- and connect V.A.G 1598/21 test box (-1-) to harness connector -2-.

The specified values are matched to the multimeter (Fluke 83 or equivalent) and are not necessarily applicable for other test units.