Audi A8 1994 Service Manual page 111

Motronic injection and ignition system (6-cylinder) - Edition 02.1999
- Operate starter for a few seconds.
The diode test lamp should flash briefly once every two engine revolutions.
Note:
Diode test lamps with a low current draw continue to glow faintly between impulses from the engine control unit
(rather than going out completely) and become much brighter when receiving an impulse.
If the diode test lamp does not flash, test the voltage supply.
Test voltage supply for Hall sender:
- Unplug connector from the relevant Hall sender.
- Switch ignition on.
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- -> Connect hand-held multimeter V.A.G 1526 (voltage measurement range) between engine earth and
socket 1 of connector.
Specification: approx. 5 V
Testing signal wire for Hall sender:
- Switch ignition on.
- -> Connect hand-held multimeter V.A.G 1526 (voltage measurement range) between engine earth and
socket 2 of relevant connector.
Specification: approx. battery voltage
Testing earth connection for Hall sender:
- -> Connect hand-held multimeter V.A.G 1526 (resistance measurement range) between socket 3 on con‐
nector and engine earth.
Specification: Continuity
Audi A8 1994 ➤
1.11 - Testing Hall senders-G40and-G163
107