1999 AUDI A8 ignition

01-296

Resistance measurement: switch multimeter to 2 M measuring range
Test
step VAG
1598/20
sockets Test of
Test conditions
- Additional steps Specified
value Corrective action
25 A) 51 + 28
3)
51 + 34
51 + 55
51 + 26 Wiring to ECM (upshift/downshift
signal)
Ignition switched
off
- ECM
disconnected infinite
1)
- Check wiring per wiring
diagram.

51 + 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 & 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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01-297

Voltage measurement: switch multimeter to 20 V measuring range
Test
step VAG
1598/20sockets Test of
Test conditions
- Additional stepsSpecified
value Corrective action
26 13 + 34
13 + 6 Tiptronic
switch -
F189- Ignition switched
on
- Selector lever in D
but not in tiptronic gateapprox. 10
V - Check wiring according to wiring
diagram.
Ignition switched
on
- Selector lever
tiptronic gate approx. 20
mV
Repair Manual, 5 Spd. Automatic
Transmission 01V, Repair Group 38
- Check magnet on lateral gate cover
1)
- Repair shift mechanism, if necessary
replace gate cover or circuit board with
Tiptronic switch -F189
1)
- Perform test step 29
1) The Tiptronic Switch -F189- receives its tiptronic gate recognition information or tiptronic up- and down-shift information via
the large magnet which is mounted on the lateral gate cover of the gate cover. If the switch has become detached, the gate
cover must be replaced.
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01-298

Voltage measurement: switch multimeter to 20 V measuring range
Test step
VAG
1598/20sockets Test of
Test conditions
- Additional stepsSpecified
value Corrective action
27
46 + 54
46 + 55 Tiptronic
Switch -
F189- Ignition switched off
- Selector lever in
Tiptronic gate less than
1.5V With the Tiptronic Switch the driver
can manually select the desired
driving range
2)

Ignition switched on
- Selector lever in
Tiptronic gate and up-
shift switch actuated approx.
battery
voltage - Check wiring according to wiring
diagram. If installed also check
wiring to Tiptronic steering wheel

46 + 34
46 + 6 Ignition switched on
- Selector lever in D
- Selector lever in
Tiptronic gate
- Selector lever in
Tiptronic gate and
downshift switch
activated approx. 12V
Repair Manual, T5 Spd.
Automatic Transmission 01V, Repair Group 37
- Check magnet on lateral gate
cover
1)
- Repair shift mechanism, if
necessary replace gate cover or
circuit board with Tiptronic switch -
F189- 1)
Continued


Ignition switched on
- Selector lever in approx.
15mV - Perform test step 28
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01-299

Voltage measurement: switch multimeter to 20 V measuring range
Test step
VAG1598/20sockets
Test of
Test conditions
- Additional stepsSpecified
value Corrective action
27
cont'd 47 + 34
47 + 6 Tiptronic
Switch -
F189- Ignition switched on
- Selector lever in D
- Selector lever in
Tiptronic gate
- Selector lever in
Tiptronic gate and up -
shift switch activated approx. 12V With the Tiptronic Switch the
driver can manually select the
desired driving range
2)
- Check wiring according to
wiring diagram. If installed also
check wiring to Tiptronic
steering wheel

Ignition switched on
- Selector lever in
Tiptronic gate and
down-shift switch
activated approx.15
mV - Check magnet on lateral gate
cover
1)

46 + 54
47 + 55
Ignition switched off
- Selector lever in
Tiptronic gate less than
1.5V - Repair shift mechanism, if
necessary replace gate cover
or circuit board with Tiptronic
switch -F189-
1)
Continued



Ignition switched off
- Selector lever in
Tiptronic gate and approx.
battery
voltage Repair Manual, 5 Spd.
Automatic Transmission 01V, Repair Group 37

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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
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01-302

Wiring between transmission and 88-pin
connector for Transmission Control
Module (TCM) -J217-, testing


Perform if:

Output Diagnostic Test Mode (DTM) or
Electrical test indicates malfunctions in the
transmission, the TCM -J217-, or in the
corresponding wiring.

Test conditions
Ignition switched off
Connect VAG1598/20 adapter only to 88-pin
connector of transmission wiring harness.
Perform measurements with VAG1598/20
adapter on the outside of the vehicle

- Remove noise insulation panel.
- Remove bracket -1- for noise insulation panel.
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01-308
Transmission with Multi-function Transmission Range (TR) switch -F125- with 8 - pin connector, checking
Resistance measurement: switch multimeter to 2 M measuring range
Test
step Connector
pins at F 125 Test of
Test conditions
- Additional stepsSpecified
value Corrective action
1 1 + 7
1 + 6 Multi-function
TR switch -
F126- Ignition switched
off
- Selector lever in P,
R, N, D, 4, 3, and 2 infinitive
1)
- Check connector on multi-function
TR switch for corrosion, water ingress
or loose connection

1 + 2
Ignition switched
off
- Selector lever in P,
N, and D smaller than
2
Repair Manual, 5 Spd. Automatic
Transmission 01V, Repair Group 37
- If necessary adjust selector lever
cable

- Selector lever in R,
4, 3, and 2 infinitive
1)

1 + 3

Ignition switched
off
- Selector lever in R,
N, and 4 smaller than
2

Continue


Ignition switched
off infinitive
1)
Repair Manual, 5 Spd. Automatic - Replace multi-function TR switch
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01-309
Transmission with Multi-function Transmission Range (TR) switch -F125- with 8 - pin connector, checking
Resistance measurement: switch multimeter to 2 M measuring range
Test step
Connector pins
at F 125 Test
of
Test conditions
- Additional stepsSpecified
value Corrective action
Continued

1 1 + 4 Ignition switched
off
- Selector lever in N,
D, 4, and 2 infinitive
1)

- Check connector on multi-function TR
switch for corrosion, water ingress or loose
connection

1 + 5
- Selector lever in P,
R, and 3 infinitive
1)

- If necessary adjust selector lever cable

Ignition switched
off
- Selector lever in D,
4, and 3 smaller than
2
Repair Manual, 5 Spd. Automatic
Transmission 01V, Repair Group 37


1 + 8

- Selector lever in P,
R, N, and 2 infinitive
1)



Ignition switched
off
- Selector lever in Rsmaller than
2
Continue
- Selector lever in P, infinitive
- Replace multi-function TR switch
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