Turbocharger Control Module 1 -J724-, REMOVING AND INSTALLING, VEHICLES WITH TWO TURBOCHARGERS

WARNING: This page is about a different car, the 2015 Audi A7 Quattro and 2014 Audi A7 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

Turbo E-Positioner Service Kit VAS6395 / VAS6395A or VAS6395B
Turbo E-Positioner Service Kit - Bracket VAS6395 /7

Correct the Turbo E-Positioner Service Kit - Bracket VAS6395 /7 if necessary.

Fig 1: Identifying Bracket

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Reworking of the opening -arrow- shown in the image half -A- is not required.

-- If the opening does not exist, rework the bracket Turbo E-Positioner Service Kit - Bracket VAS6395 /7 using a file as shown in image half -B-.

Removing

NOTE:

Follow all the rules of cleanliness, refer to CLEAN WORKING CONDITIONS .

-- Remove the engine cover, refer to ENGINE COVER, REMOVING AND INSTALLING .

-- Remove the plenum chamber bulkhead, refer to Bulkhead .

-- Release the cover -3- and swivel it to the side -arrow-.

Fig 2: Identifying Cover, Positive Terminal And Ground Terminal

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-- Connect the Turbo E-Positioner Service Kit VAS6395 to the positive terminal -2- and to the ground -1- using the Cable Sets VAS6395/2.

NOTE:

The following procedure description uses the Turbo E-Positioner Service Kit - E Box VAS6395 /1 or VAS6395 A/1

Depending on the equipment stock in the workshop, the E-Box VAS6395 B/1 can also be used.

The button positions are ordered differently, but the names and functions are the same. (See image)

Fig 3: Identifying E Box VAS6395 /1- VAS6395 A/1 And VAS6395 B/1

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Procedure for E-Box VAS6395 B/1:

Fig 4: Identifying Procedure For Tool For Replacing E-Positioner On Turbo VAS 6395/1A

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-- Select the software version SW Hella Bi-Turbo using the ↑ -item 5- and ↓ -item 6- buttons.

-- Press the v button -item 4- to confirm the software version.

NOTE:

In this example, Hella software -1- is selected.

Procedure for E-Positioner Service Kit VAS6395 A/1:

Fig 5: Identifying Procedure For Tool For Replacing E-Positioner On Turbo VAS 6395/1A

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-- Select the software version SW Hella Bi-Turbo using the ↑ -item 5- and ↓ -item 6- buttons.

-- Press the v button -item 4- to confirm the software version.

NOTE:

In this example, Hella software -1- is selected.

If the software version SW Hella Bi-Turbo is not available, perform a software update through the manufacturer of the E-Positioner Service Kit - E-BoxVAS6395 A/1 Contact the corresponding tool provider associated with the importer.

Procedure for Electronic Unit (E-Box) VAS6395/1:

Fig 6: Identifying VAS 6395/1 Software Version

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Check the software version of the Electronic Unit (E-Box) VAS6395/1:

CAUTION:

Danger of damaging the Turbocharger Control Module 1 -J724-.

Make sure the correct software is loaded in the Electronic Unit (E-Box)VAS6395/1 before performing the following procedure:

If the correct software is loaded, the following will be displayed on the Electronic Unit (E-Box)VAS6395/1 (2 seconds after the voltage supply is connected):

1. >START Bi-Turbo
2. NEXT [>]

If the following appears in the display, then incorrect software has been loaded:

1. >TEST
2. LEARN

1. >START
2. Next

NOTE:

In this case, download the correct software "Hella Bi-Turbo" from "Audi Service Net" under the "Workshop Equipment" category.

Procedure for all E-boxes

Fig 7: Identifying VAS6395A/2 Connector

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-- Disconnect the Turbocharger Control Module 1 -J724- connector.

-- Connect the Cable Sets VAS6395A/2 to the Turbocharger Control Module 2 -J724- and to the Turbo E-Positioner Service Kit VAS6395.

Display on the Turbo E-Positioner Service Kit VAS6395:

Fig 8: Identifying Electronic Unit (E-Box)

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1. >START Bi-Turbo
2. NEXT [>]

-- Press the v button -item 4- to continue.

The Turbo E-Positioner Service Kit VAS6395 checks the Turbocharger Control Module 1 -J724- adjustment range in steps to determine if the end points are being reached. "CHECK" appears in the display.

Display on the Turbo E-Positioner Service Kit VAS6395:

Fig 9: Identifying Electronic Unit (E-Box)

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[OK]

NOTE:

If "[OK]" appears in the display, then the Turbocharger Control Module 1 -J724- adjustment range is OK.

If "FAULT [OK]" appears in the display, tap the side of the Turbocharger Control Module 1 -J724- housing several times with a screwdriver handle and then the v button -item 4- to repeat the test.

-- Remove the bolt -1-.

Fig 10: Identifying Bolt 1

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NOTE:

The other bolts visible in the illustration must not be removed.

-- Attach the Bracket VAS6395/7 to the center opening in the bracket for the Turbocharger Control Module 1 -J724- and tighten the bolt to -arrow- 7 Nm.

Fig 11: Identifying Bracket VAS6395/7 And Bolt

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NOTE:

The centering pins on the Bracket VAS6395 /7 must engage in the bracket opening for the Turbocharger Control Module 1 -J724-.

-- Press the v button -item 4- to continue.

Fig 12: Identifying Electronic Unit (E-Box)

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To determine the voltage, the Turbocharger Control Module 1 -J724- will check back and forth several times between the stops.
Then the Turbocharger Control Module 1 -J724- will go into the in installation position.

-- While determining the voltage, tap on the side of the Turbocharger Control Module 1 -J724- housing with the handle of a screwdriver until the following appears in the display:

Display on the Turbo E-Positioner Service Kit VAS6395:

X, XXX V
[↑][↓][OK]

-- Write down the voltage.

Specified value for CGQB: 3.3 to 3.7 V.
Specified value for CVUA, CVUB: 3.7 to 4.2 V.

If "FAULT [OK]" is shown in the display,

- or a voltage value for CGQB is less than 3.3 or greater than 3.7 V

- or a voltage value for CVUA, CVUB is less than 3.7 or greater than 4.2 V

disconnect the Turbo E-Positioner Service Kit VAS6395 and repeat the entire procedure Turbocharger Control Module 1 -J724-, REMOVING AND INSTALLING, VEHICLES WITH TWO TURBOCHARGERS .

-- Disconnect the Cable Sets VAS6395/2 with the adapter from the Turbocharger Control Module 1 -J724-

Fig 13: Identifying VAS6395A/2 Connector

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CAUTION:

The voltage supply for the Turbo E-Positioner Service Kit VAS6395 must remain connected.

-- Unclip the lock washer.

Fig 14: Identifying Coupling Rod And Bolts

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-- Disengage the coupling rod -4- from the Turbocharger Control Module 1 - J724- and move downward.

-- Remove the screws -1, 2 and 3- and dispose of them.

NOTE:

The other bolts visible in the illustration must not be removed.

-- Remove the old Turbocharger Control Module 1 -J724- and dispose of it.

-- Install the new Turbocharger Control Module 1 -J724- in reverse order of removal.

-- Install the new M6 x 15 bolts -1, 2 and 3- with the narrow shaft.

-- Only tighten the bolts by hand.

The Turbocharger Control Module 1 -J724- must contact the retaining plate without play, but is must be possible to move it by hand.

-- Connect the Cable Sets VAS6395/2 with the adapter to the Turbocharger Control Module 1 -J724-

Fig 15: Identifying VAS6395A/2 Connector

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Fig 16: Identifying Coupling Rod And Bolts

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NOTE:

The coupling rod -4- must not be installed for the next step.

-- Press the v button -item 4- to continue.

Fig 17: Identifying Electronic Unit (E-Box)

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Display on the Turbo E-Positioner Service Kit VAS6395:

> 1. START Bi-Turbo
2. NEXT [>]

-- Select "NEXT" using the ↓ button -item 6-.

-- Press the v button -item 4- to continue.

Fig 18: Identifying Electronic Unit (E-Box)

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The Turbo E-Positioner Service Kit VAS6395 checks the Turbocharger Control Module 1 -J724- adjustment range in steps to determine if the end points are being reached. "CHECK" appears in the display.

Display on the Turbo E-Positioner Service Kit VAS6395:

X, XXX V
[OK]

NOTE:

If "FAULT" appears in the display, then replace the new Turbocharger Control Module 1 -J724- again.

-- Press the v button -item 4- to continue.

Fig 19: Identifying Electronic Unit (E-Box)

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Display on the Turbo E-Positioner Service Kit VAS6395:

[OK]

-- Press the v button -item 4- to continue.

Fig 20: Identifying Electronic Unit (E-Box)

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Display on the Turbo E-Positioner Service Kit VAS6395:

X.XXX V (Starting Up Voltage)
[OK]

The Turbocharger Control Module 1 -J274- moves into the installation position.

-- Insert the coupling rod -3-.

Fig 21: Identifying Coupling Rod

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-- Install the lock washer -2-.

The lock washer must engage audibly.

-- Gently push the Turbocharger Control Module 1 -J724- to the left side of the vehicle, until the lever -1- touches the Bracket VAS6395/7.

-- Hold the -J724- in this position.

-- Tighten the bolts -1, 2 and 3- to 5 Nm.

Fig 22: Identifying Bolts 1, 2 And 3

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-- Press the v button -item 4- to continue.

Fig 23: Identifying Electronic Unit (E-Box)

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The Turbocharger Control Module 1 -J274- will move back and forth several times between the stops and will be set to the start up voltage.

Display on the Turbo E-Positioner Service Kit VAS6395:

X.XXX V (Starting Up Voltage)
[OK]

NOTE:

If [OK] appears in the display, stop the adjustment Turbocharger Control Module 1 -J724-, REMOVING AND INSTALLING, VEHICLES WITH TWO TURBOCHARGERS => .

If "CHECK" appears in the display, continue as follows.

Procedure, if "CHECK" appears in the display:

Fig 24: Identifying Electronic Unit (E-Box)

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Display on the Turbo E-Positioner Service Kit VAS6395:

[<<<]
CHECK

[>>>]
CHECK

-- Loosen the screws -1, 2 and 3- just enough so that is possible to move the Turbocharger Control Module 1 -J724- with slight resistance in the direction specified.

Fig 25: Identifying Bolts 1, 2 And 3

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If [<<<] appears in the display, then slightly move the turbocharger control module 1 -J724- to the right side of the vehicle.
If [>>>] appears in the display, then slightly move the turbocharger control module 1 -J724- to the left side of the vehicle.

-- Tighten the bolts -1, 2 and 3- to 5 Nm.

-- Press the v button -item 4- to continue.

Fig 26: Identifying Electronic Unit (E-Box)

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The Turbocharger Control Module 1 -J274- will move back and forth several times again between the stops and will be set to the start up voltage.

Display on the Turbo E-Positioner Service Kit VAS6395:

X, XXX V
[OK]

Complete the adjustment:

Fig 27: Identifying Bolts 1, 2 And 3

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-- Tighten the bolts -1, 2 and 3- to 10 Nm.

-- Press the v button -item 4- to continue.

Fig 28: Identifying Electronic Unit (E-Box)

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Display on the Turbo E-Positioner Service Kit VAS6395:

X, XXX V
[OK]

-- Remove the bolt -arrow- and remove the bracket VAS6395 /7.

Fig 29: Identifying Bracket VAS6395/7 And Bolt

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-- Re-install the bolt and tighten : Bolt.

-- Press the v button -item 4- to continue.

Fig 30: Identifying Electronic Unit (E-Box)

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The Turbocharger Control Module 1 -J724- goes to the end points.

NOTE:

If "FAULT" appears in the display, then replace the new Turbocharger Control Module 1 -J724- Turbocharger Control Module 1 -J724-, REMOVING AND INSTALLING, VEHICLES WITH TWO TURBOCHARGERS => .

Display on the Turbo E-Positioner Service Kit VAS6395:

[OK]

The adjustment is complete.

-- Disconnect the connector for the Turbo E-Positioner Service Kit VAS6395.

Assembly is performed in reverse order.