1999 AUDI A4 fuel

01-278

35- Fuel consumption signal
(engine torque, actual)
1) 54- Supply voltage (terminal 15)
36- Multi-function TR switch -F125-, L1 55- Supply voltage (terminal 15)
37- Multi-function TR switch -F125-, L3 56- Vacant
38- Vacant -
39- Vacant -
40-
Engine speed (RPM) signal
1)
-
41-
Throttle position value (load signal)
1)
-
42- Transmission VSS -G38- -
43- Vacant -
44- Sensor for transmission RPM -G182- - Terminals 57 - 83 are vacant
45- Vacant -
46- Tiptronic upshift switch -
47- Tiptronic downshift switch -
48- Vacant -
49- Vacant 84- Vacant
50- Vacant 85-
CAN-bus
3)
51- Upshift/downshift signal
(for engine torque reduction) 86-
CAN-bus 3)
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01-294

Resistance measurement: switch multimeter to 2 M measuring range
Test
step VAG
1598/20
sockets Test of
Test conditions
- Additional stepsSpecified
value Corrective action
22 A) 35 + 28
1)
35 + 34
35 + 55
35 + 26 Wiring to ECM (fuel
consumption/load signal)
Ignition
switched off
- ECM
disconnected more than
40 K
- Check wiring per wiring diagram.
- Disconnect connections to other
components which also receive this
signal and repeat measurement.

35 + xx
2)
less than 1.5


- Check these components for short
circuit if necessary (e.g. on-board
computer).
Change
measuring range
to 20 V Measure
Voltage Repair Manual, Electrical Equipment, Repair Group 01


35 + 34
35 + 28
1)
Ignition
switched on
- ECM
disconnected Approx. 5 V
1) Pin 28 at the control module is vacant for vehicles with 10-pin connector of multi-function switch -F125-.
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01-301

Resistance measurement
Test
step VAG
1598/20
sockets Test of
Test conditions
- Additional stepsSpecified
value Corrective action
28 A) 85 + 28
3)
85 + 34
86 + 28 3)
86 + 34 Wiring connection of TCM to
ECM (CAN-bus)
Ignition switched
off ECM
disconnected infinite
1)
- Check wiring per wiring
diagram.

85 + xx
2)
86 + xx 2)
less than 1.5

Further information on CAN-bus
page 01
-263

1) Switch VAG1526 to highest resistance ( ) measuring range. 2) Applicable terminal assignment at Engine Control Module (ECM).

Repair Manual, Fuel Injection & Ignition, Repair Group 24
Pa
ge 46 of 66 Electrical testin
g
11/20/2002 htt
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yp
e=re
pair&id=AUDI.B5.AT02.01.16