Service & Repair Manual

01-5
Function test of warning lamp
- Switch ignition on.
Warning lamp for On Board Diagnostic
(Malfunction Indicator Lamp -MIL-) must
light up
A - Warning lamp for On Board Diagnostic
(Malfunction Indicator Lamp -MIL-) does not
light up
- Connect VAG1598/31 test box at wiring harness
to ECM, do not connect ECM Page 24-17 .
- Bridge sockets 1 and 47 of test box.
- Switch ignition on.
Warning lamp must light up.
If warning lamp does not light up:
- Switch ignition off.
- Remove instrument cluster:
Pa
g
e 5 of 19Motronic, On Board Dia
g
nostic
(
OBD
)
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