Service & Repair Manual

24-17
Wire and component test using
VAG1598/31 test box
Notes:
VAG1598/31 test box is designed so that it can
be simultaneously connected to the wiring
harness at the Engine Control Module (ECM)
and also to the ECM itself.
This is advantageous because electronic
engine control remains fully functional (e.g.
measurement of signals with engine running)
when the test box is attached.
Relevant test procedures note whether Engine
Control Module (ECM) should also be
connected to the test box or not.
Always use VAG1594A connector test kit to
attach measurement devices (e.g. VAG1527B
voltage tester, VAG1526 multimeter etc.).
CAUTION!
To reduce the risk of damaging electronic
components, set the tester to the approprate
test range and observe test requirements
before connecting test leads.
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