1998 AUDI A8 diagram

01-286

Resistance measurement: switch multimeter to 200 measuring range
Test
step VAG
1598/20
sockets Test of
Test
conditions
- Additional
steps Specified
value Corrective action
7 6 + 34
28
1) + 34 Ground (GND) connection of
Transmission Control Module
(TCM) -J217-
Ignition
switched off smaller than
1
- Check wiring per wiring
diagram.

34 + battery
ground (GND)
smaller than
1

8
52 + 53 Voltage supply to solenoid
valves
Ignition
switched off smaller than
1,5
- Check wiring per wiring
diagram.
- Perform test step 1
- Check wiring between TCM
and 16-pin connector page 01
-302
.
- Perform test step 1
- Check harness in
transmission according to
wiring diagram
1) Pin 28 at the control module is vacant for vehicles with 10-pin connector of multi-function switch -F125-.
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01-287

Resistance measurement: switch multimeter to 200 measuring range
Test
step VAG
1598/20
sockets Test of
Test
conditions
- Additional stepsSpecified
value Corrective action
9 52 + 30 Solenoid Valve
1 -N88- Ignition
switched off 25 to 35

- Check 16-pin connector to transmission for
contact corrosion

30 + 34
infinity
1)
- Perform test step 8
10 52 + 33 Solenoid Valve
2 -N89-
Ignition
switched off 25 to 35

- Check wiring connection from 88-pin connector to
8-pin connector page 01
-302


33 + 34
infinity
1)
- Check wiring harness in transmission according
to wiring diagram, replace if necessary.
11 52 + 32 Solenoid Valve
3 -N90-
Ignition
switched off 25 to 35

Repair Manual, 5 Spd. Automatic Transmission
01V, Repair Group 38
- Remove and install valve body

32 + 34
infinity
1)
12 52 + 5 Solenoid Valve
4 -N91-
Ignition
switched off 6 to 8

5 + 34
infinity
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01-288

Resistance measurement: switch multimeter to 200 measuring range
Test
step VAG
1598/20
sockets Test of
Test
conditions
- Additional stepsSpecified
value Corrective action
13 52 + 1 Solenoid valve 5
-N92-
2)
Ignition
switched off 6 - 8
- Check for contact corrosion on 16-pin connector
to transmission.

1 + 34
infinite
1)
- Perform test step 8.
14 52 + 29 Solenoid valve 6
-N93-
3)
Ignition
switched off 6 - 8
- Check wiring between 88-pin connector for TCM
and 8-pin connector page 01
-302
.

29 + 34
infinite
1)
- Check wiring harness in transmission according to
current wiring diagram; replace if necessary.
15 52 + 4 Solenoid valve 7
-N94-
4)
Ignition
switched off 6 - 8
Repair Manual, 5 Spd. Automatic Transmission
01V, Repair Group 38
- Remove and install valve body

4 + 34
infinite
1)

1) Switch VAG1526 to highest resistance ( ) measuring range. 2) Solenoid Valve 5 -N92- is also called Pressure Valve 2 -N216-.
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01-289

Resistance measurement: switch multimeter to 200 measuring range
Test step
VAG
1598/20
sockets Test of
Test conditions
- Additional stepsSpecified
value Corrective action
16 2 + 36 Shift lock
solenoid -N110-
3)
Ignition switched off
- Selector lever in P14 - 28
Repair Manual, 5 Spd. Automatic
Transmission 01V, Repair Group 37
- Check wiring per wiring diagram.
- Check Multi-function Transmission
Range (TR) switch page 01
-306

- Perform test step 2 and 6
- Replace shift lock solenoid -N110-.
17
2)
18 + 34 Kick-down
switch -F8-
Ignition switched off infinite
1)
- Check wiring per wiring diagram.
not for E-gas
engines
Accelerator pedal not
depressed
Repair Manual, General, Engine,
Repair Group 20 - Adjust or replace accelerator pedal
cable.

- Depress accelerator
pedal to kick-down. less than 1.5


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01-290

Resistance measurement: switch multimeter to 20 K measuring range
Test
step VAG
1598/20
sockets Test of
Test conditions
- Additional stepsSpecified
value Corrective action
18 14 + 42 Transmission VSS -
G38-
2)
Ignition
switched off
- Check wiring per wiring diagram.
min.
0.8 K

max.
1.2 K


14 + 34
14 + 54
42 + 54
42 + 34
infinite
1)
- Replace transmission VSS -G38-, Fig. 10, Page 01
-28
.

15 + 34
15 + 54 Shielding for -G38-
Ignition
switched off infinite
1)
- Check wiring per wiring diagram.
1) Switch VAG1526 to highest resistance ( ) measuring range. 2) Transmission Vehicle Speed Sensor (VSS) -G38- is also referred to as Sensor for Transmission Output RPM -G195-.
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01-291

Resistance measurement: switch multimeter to 20 K measuring range
Test step
VAG
1598/20
sockets Test of
Test
conditions
- Additional
steps Specified
value Corrective action
19 16 + 44 Sensor for
transmission RPM -
G182- Ignition
switched off
- Check wiring per wiring diagram.
Only for hydraulic
control -E17-
2) min.
0.23 K

max.
0.30 K

44 + 34
44 + 54
16 + 54
16 + 34
infinite
1)
- Replace sensor for transmission
RPM -G182- , Fig. 11, Page 01
-
29
.

23 + 34
23 + 54 Shielding for -G182-
Ignition
switched off infinite
1)
- Check wiring per wiring diagram.
1) Switch VAG1526 to highest resistance ( ) measuring range. 2) This test step can only be performed on transmission with hydraulic control E17. For information regarding the
transmission installed:
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01-293

Resistance measurement: switch multimeter to 2 M measuring range
Test
step VAG
1598/20
sockets Test of
Test conditions
- Additional stepsSpecified
value Corrective action
21 A) 41 + 28
3)
41 + 34
41 + 55
41 + 26 Wiring to ECM (throttle
signal)
Ignition switched
off ECM
disconnected infinite
1)
- Check wiring per wiring
diagram.

41 + xx
2)

less than 1.5


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

Electrical wiring diagrams Troubleshooting & Component Locations A) Signal is transmitted to Transmission Control Module (TCM) via the Engine Control Module (ECM). Test is only for vehicles
without CAN-Bus

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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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