lights AUDI A4 1997 B5 / 1.G AFC Engine Intake Manifold Over Valve Checking Workshop Manual

24-66

Checking triggering

If voltage tester does not flash, or lights up constantly:
If voltage tester lights constantly:
If voltage tester does not flash: - Connect VAG 1527B voltage tester between intake manifold change-
over valve connector terminal 1 (B+) and 2 using jumper wires from
connector test kit VW 1594.
- Use scan tool "Output Diagnostic Test Mode" function 03 to trigger
Intake manifold change-over valve page 01
-145
.
Voltage tester must flash
- Connect VAG 1598/19 test box to ECM page 01
-255
.
- Check wiring from intake manifold change-over valve connector
terminal 2 to test box socket B4 to Ground (GND).
- Check wiring for continuity between terminal 2 of intake manifold
change-over valve connector and socket B4 of test box.

Specified value: max. 1.0

If wiring is OK: - If necessary eliminate break in wiring or short to Ground.
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