1999 AUDI A4 air condition

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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01-292

Resistance measurement: switch multimeter to 2 M measuring range
Test
step VAG
1598/20
sockets Test of
Test
conditions
- Additional stepsSpecified
value Corrective action
20 21 + 22 Transmission Fluid (ATF)
Temperature sensor -G93-
Ignition
switched off
- Check wiring between 88-pin
connector on TCM and 8-pin
connector page 01
-302
.

ATF
temperature
ATF temperature sensor -G93- is
integrated in wiring harness in
transmission. - Check wiring harness in
transmission; replace if necessary.

approx. 20 C
approx. 0.83
K
2)


approx. 60 C
approx. 1.28
K
2)


approx. 120 C
approx. 1.88
K
2)


21 + 34
22 + 28
3)
Ignition
switched off infinite
1)
Repair Manual, 5 Spd. Automatic
Transmission 01V, Repair Group 38
- Remove and install valve body
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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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01-295

Resistance measurement: switch multimeter to 2 M measuring range
Test
step VAG
1598/20
sockets Test of
Test conditions
- Additional stepsSpecified
value Corrective action
23 A) 40 + 28
3)
40 + 34 Wiring to ECM (engine
RPM signal)
Ignition
switched off
- ECM
disconnected 15 - 80 K
- Check wiring per wiring diagram.
- Check on-board computer.

40 + xx
2)
less than 1.5

Repair Manual, Electrical
Equipment, Repair Group 01

24 A) 20 + 28
3)
20 + 34
20 + 55
20 + 26 Wiring to ECM (torque
reduction)
Ignition
switched off
- ECM
disconnected infinite
1)
- Check wiring per wiring diagram.

20 + xx
2)
less than 1.5


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