Main pressure, checking

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Conditions for performing check

Diagnostic Trouble Code (DTC) memory checked

When the DTC memory is checked, the following display should appear:

"No DTC recognized!"

ATF level OK

Special tools and equipment

V.A.G 1702 Pressure tester

Fig 1: V.A.G 1702 Pressure Tester
Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove bolt (arrow) for main pressure drilling. Always replace bolt.

Fig 2: Main Pressure Drilling Bolt

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connect pressure tester V.A.G 1702 and tighten thumb screw.
Start engine.
Bleed pressure tester V.A.G 1702 by loosening thumb screw and tightening it when bleeding is complete.

If V.A.G 1551 is used:

Fig 3: VAS 5051 Connected To Data Link Connector

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove diagnostic connection cover -1-.
With ignition switched off, connect V.A.G 1551 with diagnosis cable V.A.G 1551/3A.

Indicated on display

V.A.G - ON BOARD DIAGNOSTIC HELP
1 - Rapid data transfer1)
2 - Blink code output1)

1) appears alternately

Start engine.
Press key 1 for "Rapid data transfer" mode.

Indicated on display

Rapid data transfer HELP
Enter address word XX

Press keys 0 and 2. (Enters address word "Transmission electronics").

Indicated on display

Rapid data transfer Q
02 transmission electronics

Confirm entry with key Q.

Indicated on display

Rapid data transfer HELP
Select function XX

Press keys 0 and 8. (Function "Read measured value block" is selected).

Indicated on display

Rapid data transfer Q
08 - Read measured value block

Confirm entry with key Q.

Indicated on display

Read measured value block
Enter display group number XXX

Press keys 0 0 and 5. (005 selects "Display group number 005".)
Confirm entry with key Q.

Indicated on display

Read measured value block 5 →
30 ° C 0011011 0 900 rpm

First display zone shows ATF temperature

Allow ATF temperature to rise to 60 ° C.

Main pressure specifications at idle

	Selector lever positions
	D	R
	Idle	Idle
Pressure in bar	3.4... 3.8	5... 6

If there are deviations from the prescribed values, the following could be the cause:

Possible causes	Correction
Idling speed too high	Adjust engine
ATF pump faulty	Check ATF pump and replace if necessary
Sticking valves in valve body	Replace valve body

Switch off engine.

Fig 4: Identifying Fuse & Solenoid Valve Connector

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Solenoid valve connector

Press fuse together and pull off connector.
Start engine.

NOTE: If possible, main pressure test should be performed on a rolling road.

Main pressure specifications at 2000 rpm

	Selector lever positions and test conditions
	D	R
	Engine speed approx. 2000 rpm	Engine speed approx. 2000 rpm
Pressure in bar	12.4... 13.2	23.0... 24.0

If there are deviations from the prescribed values, the following could be the cause:

Possible causes	Correction
ATF pump faulty	Check ATF pump and replace if necessary
Sticking valves in valve body	Replace valve body

After test is complete:

Disconnect pressure tester V.A.G 1702.
Install new bolt for main pressure drilling and tighten to 15 Nm.
Connect solenoid valve connector.
Once connector has been reconnected, check and erase DTC memory.