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COMPUSHIFT

£795.00

Product Information

 

Brief Description of Operation.

The Compushift is a 'stand alone' ECU that controls the electronic version of the 4HP22/24. It takes 4 inputs from the vehicle and calculates the shift points, shift pressures and converter lock up speed depending on the shift tables or 'maps' in the ECU.
This is a major step forward for those using the ZF in different applications as you are able to map your own shift speeds and pressures very easily and quickly without the complexity or hassle of a laptop.
Inputs The ECU needs to be wired to accept a minimum of 4 inputs as mentioned above, these are:
 
1) "XY switch" on the selector shaft to the left of the electronic ZF is a position switch, the loom of the Compushift needs to be wired into this switch so the ECU knows what gear you have selected with the shifter. You also wire the reverse lights through this switch (no relay needed) and the starter inhibit through the low current starter solenoid signal wire. All wires are colour coded in the fitting instructions to make this easy.

2) Clean 12V ignition switched feed.

3) Throttle Position Sensor (TPS). The ECU needs to know the throttle position, this signal takes the form of a 0 > 5 V signal which can come from either the existing vehicle TPS if you are converting a TD5 or 2.4 TDCi or you can use a small linkage connected to the throttle mechanism and use this to activate a separate small TPS. On startup this needs to be calibrated but it's very easy, you just press the relevant button on the ECU or display and you have 5 seconds to fully stroke the throttle to max and back to zero, the signal "self calibrates".
 
4) Temperature Sensor, this is used for 2 reasons, the shift pressures are adjusted depending on the oil temp to allow for the changing viscosity and if the system is used with the optional display you can monitor this temp and check for overheating. The Sensor will need to be brazed into the autobox sump below the oil level line.


Applications

We have helped develop the Compushift for the conversion of the 2007 2.4 TDCi Defender to Automatic but it can be used anywhere the ZF 4HP22/24 EH is used, i.e. Defender TD5 conversions, 2.8 TGV auto conversions, V8 competition vehicles. This system is perfect for the conversion world as you can adjust all the variables to suit your application to get the vehicle driving as you want it to drive.


Guide to Programming the Compushift

This guide is written for those using the Compushift with the ZF 4HP22/24, I mention this as there are many additional functions on the unit which are not used in this application, I will mention these but not in detail. I will however detail what we have found to be important for this application.

You can use the compushift without the display unit but you lose out on so many of the functions which make it good that it's just not worth not having it so this guide is written assuming you have also purchased the display unit.
There are 4 buttons on the display, let's call the one on the left button1 (B1) and the one on the right button 4 (B4). The are 3 levels in the programming menu and different options on each level, Level 1, Display When you turn the ignition on you will be at level 1 which I call the display level, this has 7 screens, press B4 to scroll through them and B3 to scroll back.

1) System Status, this is the first screen you get and it should say 'no faults'; on a cold morning you may have 'trans temp sensor code 18', if it does you can ignore this. You may also get 'Invalid PRNDL code 24' this will indicate you may need to adjust the XY position switch on the LHS of the autobox, neither of these error codes put it into limp home so can be cleared by pressing B4 which gets you to screen

2. 2) Shift Speed Adjust, this function will allow you to raise or lower all shift speed points of the current map, set at 'min' it will shift at the speed it is programmed to, by pressing 'max' the bar will shift to the right and all speeds will be later. You cannot adjust individual shift points with this function, all will be affected.
 
3) Pressure Adjust, this function will allow you to raise or lower all shift pressures of the current map, set at 'min' it will shift at the base regulated oil pressure it is programmed to, by pressing 'max' the bar will shift to the right and all shift pressures will be raised to give a firmer shift. You cannot adjust individual shift pressures with this function, all will be affected.

4) 8 Parameters, this is the best screen to have displayed whilst driving, you can watch what gear you are in, throttle position, speed, TCC, this is the torque converter clutch, ie if it is locked or not, off is unlocked, on is locked, transmission temp and oil pressure. There is a 'tach' function but this needs to be given a signal from the engine to work.

5) Gear, big font showing what gear you are in, useful when in tiptronic mode when racing.

6) Dynamometer, don't use it

7) Accelerometer, don't use it

Level 2, System Setup

To get to this level press B1 when in the 'System Status' screen you will now have 25 screens, use B4 to scroll through and B3 to move back  

1) Transmission Type, leave on ZF4HP24, this is OK if you have a 4HP22 or 4HP24.  

2) Engine type, the unit comes with 3 preset 'maps' to get you started, one of which you pick then modify to suit your needs, the 3 are : Gasoline, pick for a V8. High RPM diesel, not used it. Low RPM diesel for TD5 and TDCi. To change, press 'set', 'yes', 'yes', next until the one you want is shown then 'save'.

3) Transmission Mode, You are able to choose from 4 types of transmission modes : 3a) 'Automatic', Just like a stock auto,

3b) 'Manual' This mode must be used with extreme caution!! Position 1 on the shifter is just 1st, Pos 2 is just 2nd, Pos 3 is just 3rd, Pos D is just 4th. It does not look at the shift tables to inhibit unwise shifts, if you put it in 1st at 70 either the engine or the box or both will fail!

3c) 'Automatic / Switch shift', if you fit a rocker switch into a plug on the loom and select this mode you can do one of two things depending what value you input into the setup option called 'Sw-shift Min Throttle'. Note down shift from 4 to 3 and 2 will give engine braking but 'D' 1st is a free wheel on overrun so will not give engine braking. If set to say 5% the vehicle will drive as an 'auto' but when you press the rocker switch it will change gear and you will have manual control until you drop the throttle below 5% at which point it will revert back to being in 'auto'. You can also shift up with the switch at a standstill and it will pull off in 2nd. If this value is set to 0% it will drive as an 'auto' but when you press the rocker switch to change gear it will now stay in manual mode irrespective of throttle position. Moving the shifter from D to 3 and back will return to normal auto mode. The ECU will look at the shift tables and the max engine RPM and block shifts outside these parameters.

3d) 'Automatic / Tow mode', you will need to fit a switch between the neutral and the up-shift wire and when this mode is selected the vehicle will drive as an auto but when you press the switch both the shift speed and pressures will be changed to the values you have pre-set, described below. Note the converter will stay locked until you shift down to 3rd, this gives improved downhill engine braking but if you use this mode you will need to adjust the shift tables accordingly so you don't pull the revs down too low before the converter unlocks. I tried this mode but didn't find it suited the ZF and have no problems towing in the normal auto mode.

4) TPS Calibration, the compushift needs to know the throttle position, it gets this from a 0 to 5 volt signal from a throttle position sensor (TPS). On a TD5 or TDCi you can wire into the existing TPS on the throttle pedal by connecting the two wires on the compushift TPS loom, Green to pin F (signal) and the Green/White to pin G (earth). If your engine does not have a TPS you will need to fit one in somewhere in the throttle linkage so the TPS pot turns as the throttle is depressed. The software is self calibrating to the stroke is not too important. You can use the TD5 TPS or one customer found the P38 4.0 TPS worked well. If you are fitting your own TPS you will need to give this a third wire being the 5V feed, this is the green/red on the TPS loom. Once the TPS is wired in and the autobox is all in and filled with oil you will need to calibrate the TPS, to do this you go to this TPS screen, press Start and then you have 5 seconds to smoothly press the throttle pedal from zero to full and off again. Once you have done this you can exit setup and go to the 8 parameters screen and the bottom left is the throttle position, this should read 0% when off the throttle and 100% at full throttle. The default position is 50%, if it's still showing 50% repeat the calibration process.

5) TPS Direction, you can reverse the TPS direction if you have to fit the TPS backwards on the linkage.

6) Shift/Press Adjust, this tells the ECU if you are using the optional display or not, set to internal if you don't have the display and external if you do.

7) Engine Cylinders, the display has a Rev counter or Tach function displayed on the 8 parameter screen, on the power feed loom you will find a brown wire, this needs a pulsed signal from an MSD inductive pickup. Depending where you take this signal from you need to adjust the number of cylinders, i.e. if you have a V8 and take the signal from the coil wire you would set it to 8 so it knows every 8 pulses is one engine rev, if you take the feed from a spark plug HT wire you would set it to one. I have not used this function on a diesel as yet.
 
8) Always Upshift at xxxx rpm. This function will allow the shift up at a set RPM to stop engine over reving if the shift table has not yet called for an upshift. When shifting tiptronically this figure will also be looked at to ensure the downshift will not over rev the engine.

9) Transfer case ratio, the compushift is designed for the US market where all transfer cases have a 1:1 high range ratio, this setting refers to the low range ratio and changes the speedo readout and can change the pressures and shift points if the low range wire is connected. I have found no benefit of this function ; on the Defender the shifts already feel firmer due to the lower gearing when in low. We do not use this function and leave it set to 1.00.

10) Final Drive Ratio, on a US vehicle this would be the diff ratio but as our Landrover transfer cases are not 1:1 this must be set as the high ratio times the diff ratio, ie on a stock TD5 Defender the high range is 1.410 and the diff is 3.54 so you would enter 1.410 x 3.54 = 4.99.

11) Tyre Diameter, just enter the tyre diameter or more accurately 2 x the rolling radius, you can fine tune this figure later to get the display speedo accurate.
 
12) Vehicle Weight, this is related to the accelerometer function for Drag racing, not used, leave at 3080 LBS.

13) TCC Enable Gear, the TCC is the Torque Converter Clutch, the converter can be set to lock in 2nd, 3rd and 4th, 3rd and 4th, just 4th or never. The ZF was designed to lock in 4th so this is what we use, I tried 3rd and 4th but it was jerky and didn't drive nicely. I would advise just leaving set to 4th gear.

14) TCC Enable Speed, this is the speed at which you want the Torque converter to lock, I would suggest setting it about the mid 50's but set it as you like it, i.e, if you are towing all day at 50, set it to 48. When you are driving with the 8 parameters on the display the TCC goes to ON when the converter locks.

15) TCC Disable speed, this is the percentage of the TCC enable speed that the converter will unlock. I.e if the TCC enable is set to 55 and the TCC Disable set to 10% it will unlock at 49.5. We usually set to 5%.

16) TCC Max Throttle, this is the throttle percentage that the converter will unlock. The torque converter lock up clutch can often fail on any autobox especially the ZF 4HP22/24 so this is a great function to help the lock up clutch last. Basically the clutch will not lock above the set throttle percentage. This works in 2 scenarios, lets say its set to 65%, scenario 1 is a hard throttle start, if you pull off at 80% throttle you will accelerate at speed but the lock up clutch will not lock until you back off to 65% or less (assuming you are above the TCC enable speed), this is an excellent feature that stops the clutch trying to come on and possibly failing and slipping when on hard throttle. Scenario 2 is when you are cruising at say 40% throttle in lock up and accelerate, to help acceleration it will unlock at 65%. We usually set to 65%.

17) L2R Pressure Boost, this function will raise the pressure when in Low range or Reverse, as mentioned above we don't connect the low range signal and set to 10% to raise the pressures slightly in reverse.

18) Tow Speed Boost, this raises the shift speeds when in tow mode, we leave at 15% but this is irrelevant as we don't use the tow mode.

19) Tow Pressure Boost, this raises the shift pressures when in tow mode, we leave at 10% but this is irrelevant as we don't use the tow mode.

20) Sw-Shift Mon Throttle, this is the setting that governs the change point in section 3c in Transmissions Mode above.

21) Downshift Offset, this is the sensitivity to the kickdown, the lower the figure the less it will kickdown and the higher the figure the more readily it will kickdown, we set to 85% for a TD5 or TDCi but if you have a high torque engine like a big diesel you don't want it to kickdown easily as you have plenty of low rev torque available so you would reduce this figure. If you had a screaming high revving engine you would increase this figure.

22) System Diagnostics, you can access various transmission parameters to help diagnose any transmission faults. I have not used this much, which is a good sign !

23) Display contrast,

24) Display Brightness,

25) Measurements, I leave in US mode which is MPH but you may wish to change to Metric and have KPH, if you change this check all shift speeds and lock up speeds etc have converted correctly.

Level 3, Advanced Setup


To get to this level start at the 'System Status' screen then press B2 ten times and then B1 once, the display should now read "Advanced Setup" at the top. You will now have 34 screens, use B4 to scroll forward and B3 to scroll back, they are all the same until you get to : 'TCC enable TOSS', you can use this to set the converter clutch to lock at a set TOSS (Transmission output speed sensor), easier to just stick to vehicle speed. 'TCC Min throttle', the converter will unlock when you get down to this throttle setting.


The following settings should not be changed unless you are confident you know what you are doing, incorrect settings will lead to transmission failure '1-2 Shift Table', with this on screen press 'Set' , this graph is the 1-2 shift table, earlier on 'Level 1 Display' we had 'Shift Speed Adjust' which changed all shift speeds, this table allows you to adjust the 1-2 shift speeds individually.
The throttle goes up in 10% steps with each press of B4, and down with B3, at each step you can adjust the speed with B1 and B2.


With this graph you can map your 1-2 shift table so when you are accelerating at 50% throttle it will shift from 1st to 2nd at 14.2 Mph for example. Once set, press B3 to get down to 0%, then B3 again to exit. '2-3 Shift Table', as above. '3-4 Shift Table', as above. 'Gear 1 Pressure', the autobox needs to know the throttle position so it knows how hard to put the clutches on which are applied with oil pressure, on light throttle the shifts should be smooth so you would have lower oil pressure, at hard throttle you want them to clamp on firm to avoid the clutch pack slipping. If you press set it shows the 1st gear pressure table which is fairly linear with the throttle position except when you get to the higher throttle positions when you want max pressure applied.


I would advise leaving these settings alone, i.e if you put in low pressure figures for high throttle positions the clutch would come on too soft and may allow the clutch packs to slip causing a failure, hence the cautionary note above.


'Gear 2 Pressure', as above.
'Gear 3 Pressure', as above.
'Gear 4 Pressure', as above. 
 
Notes on adjust the XY switch if you have displayed 'Invalid PRNDL code 24'
 
Before this is done it makes sense to check the shifter cable is correct, to do this : Put the shifter in a midway position such as 'D', slacken off the clamp that’s holding the cable to the lever at the gearbox end, now to get the lever into 'D' also, move the lever all the way forward, this is the 'park' position, then click back 3 times, ie P R N D 3 2 1 , now clamp the cable inner to the lever in this position,

Now to the switch : Put the ignition on, scroll to setup, scroll to diagnostics, select and go to 'switch data', select, this now shows what the switch is reading, note 'I' means invalid, with the lever in 'D' I can't remember if the display will show 'D' or maybe '1' (as it will be in 1st as you are stood still), loosen the screws and rotate the switch one way until it changes to 'I', mark it, now go the other way until it shows 'I', mark it, go back to the midpoint and clamp it there, now go to park and check all positions are reading correctly,  

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Product Code: Compushift

Installation Information » (Click to Expand Collapse)

These instructions are to set for the standard Puma and Td5 applications and should not be used for other vehicles.

COMPUSHIFT SETTINGS


Display Buttons =        Top Left    
    Scroll Up^
    Scroll Left <
    Select
    Scroll Right >
    Scroll Down v
          Bottom Left

Power On
Connect Display

To restore from Factory Settings

< to system set up menu
Select
< to Load Factory Defaults
Select
^ to confirm

< to system set up menu
Select
Select transmission type appears
Select
^
A flashing dot appears on the right hand of the screen
^ to select type – ZF4HP24 US

Select
select
> Engine Type
Select
^
A flashing dot appears on the right hand of the screen
^ to select type – Low Speed Diesel

Select
< back to set up menu
select
> to No. of Engine Cylinders 

select, scroll v to     4 = Puma
       5 = Td5
Select
> to Throttle Position
Select  - You have 5 seconds here to stroke the vehicle to full throttle an back

> to set Max Engine Speed A
Select and scroll ^ to 3500 rpm
Select

> to Final Drive Ratio
Select
Scroll ^   to Puma/Td5 1.2 ratio = 4.28 
         Td5 1.4 ratio     = 4.99 
Select

> to tyre diameter
Select
Scroll ^ to 31.2
Select

>  to TCC Max Throttle A
Select
Scroll ^ to 65%
Select

> to TCC Mininum Throttle A
Select
Scroll V to 0%
Select

> to TCC Enable Speed A
Select
Scroll ^ to    56 mph Puma/Td5 1.2
    50 mph Td5 1.4
Select

>to TCC Disable Percentage A
Select
Scoll v to 5
Select

> to Downshift Offset A
Select
Scroll v to 85%
Select

> to Advanced Set Up Menu
Select

Select Shift Speed Tables
Shift Speed 1-2 A will appear,
Select

You will now need to alter the readings to agree to the tables shown below.  Ignoring the RPM middle reading adjust each reading by scroll ^v to reach required speed and press > to move to next band. You need to make the MPH reading match the TPS reading in the table below. Once 100% is reached select to exit.
Note if the required number is not shown just select the nearest number to it, above or below.

 

PUMA SETTINGS/TD5 1.2 RATIO

 

Shift 1- 2

Shift 2-3

Shift 3-4

Throttle % (TPS)

Speed (MPH)

Throttle % (TPS)

Speed (MPH)

Throttle % (TPS)

Speed (MPH)

0

3.5

0

8.1

0

20.3

10

6.6

10

13.1

10

25.2

20

9.0

20

18.0

20

30.5

30

11.8

30

23.1

30

37.0

40

14.4

40

28.0

40

43.9

50

16.9

50

32.1

50

50.0

60

18.8

60

36.1

60

54.8

70

20.9

70

40.0

70

58.5

80

22.5

80

43.0

80

62.0

90

22.5

90

45.1

90

64.1

100

22.5

100

45.1

100

65.2

  TD5 1.4 RATIO SETTINGS

 

Shift 1- 2

Shift 2-3

Shift 3-4

Throttle % (TPS)

Speed (MPH)

Throttle % (TPS)

Speed (MPH)

Throttle % (TPS)

Speed (MPH)

0

3.1

0

7.1

0

25.0

10

6.0

10

9.9

10

26.3

20

8.1

20

13.9

20

27.0

30

10.6

30

18.3

30

28.0

40

12.9

40

19.5

40

33.0

50

13.3

50

20.6

50

35.0

60

14.2

60

22.9

60

38.0

70

15.2

70

25.6

70

42.0

80

16.1

80

28.1

80

44.0

90

16.3

90

28.1

90

44.0

100

16.3

100

28.1

100

44.0

 

Continue by

> to Speed 2-3 A, select and repeat as above.  Once complete select to exit.

> to Speed 3-4 A, select and repeat as above.  Once complete select to exit.

Bottom Left

> to Shift Pressure Tables
Select
>to Shift Pressure Gear 2A

Select and enter as per table – adjust readings in same way as Shift Speed Tables this only needs doing for ‘G2’

Pressure Settings G2
Throttle % Speed (PRB)
0 0
10 10
20 20
30 28
40 37
50 45
60 55
70 80
80 100
90 100
100 100

Select
Bottom Left to exit

> to Pressure Control Source Throttle
Select
^ to select Map (note diesels will drive better if you select MAP and do the wiring accordingly and test, if petrol you will have to use the throttle source)

select
< to Map Sensor High Calibration
Select
Scroll V to 4.00
Select

< to Map Sensor Low Calibration
Select
Scroll ^ to 1.86 for TD5 and 1.62 for Puma
Select
Bottom Left
Bottom Left

> Shift Speed Adjust A
Scroll ^ to 5%
select

> to Pressure Adjust A
Scroll ^ to 5%
select

Disconnect

Technical Information / FAQ's » (Click to Expand Collapse)







 

Customer Reviews

Average Rating: 0

Great product

and very nicely pre programmed for my car. Had a small issue with the display, without any problem changed for a new one. Thanks Dave!

Pierre Rikkers :: Dec 02 2016, 17:19 PM

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