Remove/install control solenoid valves of electric controller unit

AR27.19-S-0212E

Remove/install control solenoid valves of electric controller unit

16.11.2018

Model

447 with engine 651 with transmission 722.9

Model

447, 448 with engine 274 with transmission 722.9

1

Screw

N15/11n3

Output shaft rpm sensor

N15/11y4

Clutch control solenoid valve K3

2

Leaf spring

N15/11n4

Fully integrated transmission control (VGS) control unit

N15/11y5

Multidisk brake control solenoid valve B1

6

Magnet

N15/11y1

Working pressure control solenoid valve

N15/11y6

Multidisk brake control solenoid valve B2

6a

Shift valve

N15/11y2

Clutch control solenoid valve K1

N15/11y7

Multidisk brake control solenoid valve B3

N15/11

Fully integrated transmission control (VGS) electric controller unit

N15/11y3

Clutch control solenoid valve K2

N15/11y8

Torque converter lockup clutch control solenoid valve

A

If the control solenoid valve looks like this after cleaning, it needs to be replaced

B

Cleaned control solenoid valve; if it looks like this after cleaning, it can be installed again

C

Control solenoid valve OK, can be installed again

Topical note

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

Notes on automatic transmission

AH27.19-P-0001-01NKB



Remove

1

Perform guided test on fully integrated transmission control unit (VGS) (N15/11n4) using vehicle diagnosis system.



Connect STAR DIAGNOSIS and read out fault memory

AD00.00-S-2000-04E

 Before removal of the fully integrated transmission control (VGS) electric controller unit (N15/11) the guided test must be conducted with the diagnostic system, and the characteristics stored in the fully integrated transmission control unit (N15/11n4) transferred.

2

Remove fully integrated transmission control (VGS) electric controller unit (N15/11).

AR27.19-S-0200E


The Specifications for Operating Fluids must be observed.
This avoids any damage to the transmission.

 

Disassemble/assemble

3

Remove bolts (1).

 Bolt, leaf spring for solenoid valve to timing case

*BA27.19-N-1008-01D

4

Remove leaf springs (2).

5

Remove all control solenoid valves.



Automatic transmission fluids (ATF) (specification 236.15)

BB00.40-P-0236-15A

 Assembly:
The Specifications for Operating Fluids must be observed.
Otherwise damage will occur.

 Assembly: Always install each control solenoid valve in its original installation position again. Moisten the sealing rings with transmission oil.



Check

6

Determine degree to which control solenoid valves are soiled.

If traces of wear debris or fouling are present (picture A, picture B).



Rinse all control solenoid valves.

If more than 4 control solenoid valves are defective or soiled.



Notify Market Performance Center (MPC) or general distributor, they will then determine how to proceed further

If no traces of wear debris or soiling are present (picture C).



Flushing not required.



Clean

7

Clean sieves of all control solenoid valves.



Automatic transmission fluids (ATF) (specification 236.15)

BB00.40-P-0236-15A


To clean, use only fresh transmission oil and do not use compressed air, rags, brake cleaner, etc. Always observe the Specifications for Operating Fluids.
Otherwise damage will occur.

 Clean the sieves carefully using a magnet. Then clean the sieves by rinsing them in fresh transmission oil until the wear debris and dirt are removed.



Check

8

Check that control solenoid valves are clean and undamaged.

If no soiling or damage is visible (picture B, picture C).



Control solenoid valves can be reused.

If soiling or damage is visible (picture A).



Replace affected control solenoid valves



Clean

9

Clean seats of control solenoid valves and shifting channels in fully integrated transmission control (VGS) electric controller unit (N15/11).

 Pulling the control solenoid valves out of the fully integrated transmission control (VGS) electric controller unit (N15/11) causes abrasion or dirt particles to fall into the channel below. This must be removed from the fully integrated transmission control (VGS) electric controller unit (N15/11) with the aid of a magnet or using a pipette.

10

Remove magnet (6) of shift valve (6a) a few millimeters and clean.

 Use a lint-free rag to remove shavings and wear debris from magnet (6) of shift valve (6a).

 Assembly: Check shift valve (6a) is correctly seated in fully integrated transmission control (VGS) electric controller unit (N15/11).

11

Assemble in the reverse order.



Install

12

Install fully integrated transmission control (VGS) electric controller unit (N15/11).

AR27.19-S-0200E

 Throughly clean oil pan and magnet of oil pan, then replace oil filter.

13

Perform gear selection adaptation of replaced control solenoid valves using vehicle diagnosis system.

Only if the affected control solenoid valves have been replaced.



Connect STAR DIAGNOSIS and read out fault memory

AD00.00-S-2000-04E

 After the control solenoid valves have been replaced, the corresponding gears must be adapted:
Clutch control solenoid valve K1 (N15/11y2) gear 6 to 5 and gear 2 to 3.
Clutch control solenoid valve K2 (N15/11y3) gear 3 to 4.
Clutch control solenoid valve K3 (N15/11y4) gear 4 to 3 and gear 4 to 5.
Multidisk brake control solenoid valve B1 (N15/11y5) gear 3 to 2 and gear 1 to 2.
B2Multidisk brake control solenoid valve (N15/11y6) gear 5 to 4 and electrical control operation to gear range R and D.
Multidisk brake control solenoid valve B3(N15/11y7) gear 2 to 1.
Torque converter lockup clutch control solenoid valve (N15/11y8).

 The adaptation values for the fully integrated transmission control (VGS) electric controller unit (N15/11n4) may not be reset.

 Electrohydraulic controller unit

Number

Designation

Transmission 722.9

BA27.19-N-1008-01D

Bolt, leaf spring for solenoid valve to timing case

Nm

8