1996 AUDI A4 battery

28-32

Control module voltage supply,
checking


Test requirements:

Fuse for Engine Control Module (ECM) OK

Electrical Wiring Diagrams, Troubleshooting &
Component Locations

Battery voltage at least 11 V
Generator OK

- Connect test box VAG1598/31 to wiring harness
for engine control module. Do not connect to the
engine control module itself. Page 24
-20
.

- Switch ignition on.

Note:

The B+ voltage supply for the engine control
module comes via terminal 3 (terminal 15) and
terminal 62 (terminal 30).

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28-33

- Connect hand-held multimeter VAG1526
(voltage measurement range) to the following
contacts on the test box:

Contact
Specification
3 + 2 approx.
battery voltage
3 + 1 approx.
battery voltage
62 + 2 approx.
battery voltage
If the specifications are not obtained:

- Check wiring.

Electrical Wiring Diagrams, Troubleshooting &
Component Locations
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28-47


Checking signal wire for Hall sensor
Checking Ground (GND) wire for Hall sensor: - Connect multimeter (Fluke 83 or equivalent) (voltage measurement
range) between engine Ground (GND) and socket 1 of connector.
Specified value: approx. 5 V
- Connect multimeter (Fluke 83 or equivalent) (voltage measurement
range) between engine Ground (GND) and socket 2 of relevant
connector.
Specified value: approx. battery voltage
- Connect VAG1598/31 test box to wiring harness for engine control
module. Do not connect to the engine control module itself Page 24
-
20
.

- Connect multimeter (Fluke 83 or equivalent) (resistance measurement
range) between socket 3 on connector and engine Ground (GND).
Specified value: Continuity
Resistance in wiring: max. 1.5 Ohms
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play?action=Goto&t
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pair&id=AUDI.B5.FU04.28.1