1999 AUDI A8 f125

01-307

Multi-function Transmission Range (TR)
switch -F125- (8-pin connector), testing

1. Function test

- Release spring catch securing 8-pin connector -2- to connector on
wiring to multi-function TR switch.
- Unclip connector to multi-function TR switch from retainer or remove
retainer together with connector from transmission to gain better
access to the pins in the connector.

- Pin assignment for 8 - pin connector of Multi-function (TR) switch -
F125-
- Use multi-meter VAG 1526A or Vehicle Diagnosis, Measuring and
Information System VAS 5051.
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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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01-310
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
to
1 6 + 7 Part No. signal of
Multi-function TR
switch Ignition switched
off
- Selector lever in R,
D, 4, 3, and 2 infinitive
1)
Repair Manual, 5 Spd.
Automatic Transmission 01V, Repair Group 38
- Replace multi-function TR switch

Ignition switched
off
- Selector lever in P,
and N less than 2

The Part No. signal for the Engine
Control Module (ECM) is being
checked
1) Switch VAG1526 to highest resistance ( ) measuring range. Note:

If function check was OK, check voltage supply to Multi-function TR switch -F125- page 01
-311

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01-311

2. Multi-function Transmission Range (TR)
switch -F125- (8-pin connector), testing

- Release spring catch securing 8-pin connector -2- to connector on
wiring to Multi-function TR switch.
- Check at connector with spring clips (cavities) to Transmission Control
Module (TCM)

Voltage measurement: switch multimeter to 20 V measuring range - Pin assignment for 8 - pin connector of multi-function (TR) switch -
F125- (to TCM)
- Use multi-meter VAG 1526A or Vehicle Diagnosis, Measuring and
Information System VAS 5051 Cavity in connector Test condition Specified value
1 + 6 Ignition switched on Approx. battery voltage
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01-313

3. Wiring from Transmission Control Module
(TCM) -J217- to Multi-function Transmission
Range (TR) switch -F125- (8-pin connector),
checking

- Switch off ignition.
- Disconnect connector from TCM -J217-, located in front of right seat
under the cover in the footwell page 01
-20
.
- Connect test box VAG 1598/20 to harness connector.

- Connect both 8-pin connectors -2- to multi-function switch -F125- as
shown in the illustration.
- Use multi-meter VAG 1526A or Vehicle Diagnosis, Measuring and
Information System VAS 5051
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01-314
Transmission with Multi-function Transmission Range (TR) switch -F125- with 8 - pin connector, checking
Voltage measurement: switch multimeter to 20 V measuring range
Test
step VAG
1598/20
sockets Test of
Test conditions
- Additional stepsSpecified
value Corrective action
1 36 + 34
36 + 6 Multi-function Transmission
Range (TR) switch -F125- Ignition switched
on
- Selector lever in P,
N, and D Approx. 12
V - Check connector at multi-function
switch for corrosion
- Check wiring per wiring diagram

- Selector lever in R,
4, 3, and 2 Less than 1
V - Check fuses
- Check voltage supply to -F125-
page 01
-311
.

8 + 34
8 + 6
Ignition switched
on
- Selector lever in R,
N, and 4 Approx. 12
V - Check wiring from 88-pin control
module to 8-pin connector page
01
-319
.


- Selector lever in P,
D, 3, and 2 Less than 1
V

37 + 34
37 + 6
- Selector lever in N,
D, 4, and 2 Approx. 12
V
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01-315
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 VAG
1598/20
sockets Test of
Test conditions
- Additional stepsSpecified
value Corrective action
2 36 + 8
Multi-function Transmission
Range (TR) switch -F125 Ignition switched
off
- Selector lever in Nless than 26

- Check connector at multi-function
switch for corrosion

- Selector lever in P,
R, D, 4, 3, and 2 infinitive
1)
- Check wiring from 88-pin control
module to 8-pin connector page 01
-319
.

37 + 9

Ignition switched
off
- Selector lever in D
and 4 less than 26

- Perform test steps 6 and 27.


- Fuse 31 removed
2)
- Selector lever in P,
R, N, 3 and 2 infinitive
1)

37 + 36

Ignition switched
off less than 26

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