ESP AUDI A4 1999 B5 / 1.G AFC Engine Auxiliary Input Signals Checking Workshop Manual

24-96

- Switch Fluke 83 multimeter to voltage
measurement range and connect between
signal wire (trip computer 20-pin connector) and
Ground (GND), using wiring diagram.

- Start engine and let idle.

Specified value: approx. 0.3 to 0.6 volts,
corresponding to engine speed (RPM)

- Vary engine speed continuously from 1000 to
4000 RPM.

Specified value: approx. 0.3 to 0.6 volts,
corresponding to engine speed (RPM)
If the specified value is not obtained, even
though the trip computer shows no consumption
value or there is a stored malfunction in the
TCM:

- Stop engine (switch ignition off).

- Replace trip computer and/or TCM as
required.
If the specified value is not obtained:

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