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37-133
Automatic Transmission Fluid
(ATF), checking and changing ATF level, checking
Special Tools and Equipment
VAS5051 tester with VAS5051/1 diagnostic
cable (or VAG1551 scan tool with VAG1551/3
cable)
VAG1306 drip tray
VAG1924 ATF filler tool
Protective glasses
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Test requirements:
Transmission must not be in emergency
running mode.
Vehicle on level ground.
Selector lever in "P", let engine run at idle.
A/C system and heating switched off.
ATF temperature must not be higher than
30 C at start of test, allow transmission to
cool down if necessary.
Notes:
ATF level changes with ATF temperature.
Performing ATF level check when ATF
temperature is too low causes overfilling.
Performing ATF level check when ATF
temperature is too high causes insufficient
filling.
Excess filling and insufficient filling both affect
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Page 3 of 15
the function of the transmission.
An extra ATF check must be performed for
vehicles with auxiliary ATF cooler page 37
-
138
The ATF temperature is read out by the
VAS5051 tester or VAG1551 Scan Tool (ST).
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Checking ATF temperature
Repair Manual, 5 Spd. Automatic Transmission 01V On Board
Diagnostic (OBD), Repair Group 01, Performing On Board Diagnostic (OBD)
- Connect VAS5051 tester to vehicle with VAS5051/1 diagnostic wire.
Alternately, VAG1551 Scan Tool (ST) can also be attached using
VAG1551/3 adapter.
- Start engine.
Rapid data transfer
HELP
Select function XX
When indicated on display:
- Press buttons -0- and -8- to select "Read measuring value block" and
press -Q- button to confirm input.
Read measurin
g value block
Q
Enter displa
y group number XXX
When indicated on display:
- Press buttons -0-, -0- and -4- to select display group "004" and press -
Q- button to confirm input.
Read measuring value block
4
When indicated on display:
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1
2
3
4
- Read ATF temperature in display field 1.
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Checking and correcting ATF level
Notes:
ATF level is checked at the ATF check plug.
ATF level is correct if a little bit of fluid still
escapes at the ATF check plug between 35
and 45 C
1) (dependant on the fluid level
when warming up).
1) For warm countries 50 C
WARNING!
Wear protective glasses. - Secure container of VAG1924 ATF filler tool as high up on vehicle as
possible.
- Raise vehicle.
- Place VAG1306 drip tray under transmission.
-
Once an ATF temperature of 35 C is reached, remove ATF check
plug -2- and drain excess ATF if necessary.
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If ATF exits from the ATF filler plug hole
before the ATF reaches 40 C, the ATF
level is OK.
Note:
ATF check plug must be closed again by 45 C
1) at the latest page 37
-137
.
1) For warm countries 50 C
Add ATF if no ATF has escaped from the
ATF check plug hole by 40 C.
- Insert VAG1924 ATF filler tool into an opening -
4- in the protective cap, but do not knock cap
upward.
- Fill with ATF using VAG1924 ATF filler tool until ATF exits from the
check hole.
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- Always replace seal (arrow) for ATF check plug.
- Tighten ATF check plug to 80 Nm.
-
Press button on VAG1551.- Press buttons -0- and -6- to select "End output" and press -Q- button to
confirm input.
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