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Old Thu, Sep-11-2014, 02:05:40 AM   #41
NZ_M3
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Default Re: Converting an MSS54HP into an MSS54HP CSL (H-bridge)

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Originally Posted by tap View Post
using Hot air would help. or better yet mask off the surrounding components with kapton tape / foil, preheat the section of board top and bottom with hot air or better yet 2 hot air one for top and one for bottom before you turn the heat up slow on top to get it to flow.
Great suggestions Tap ... I will give this a go and report back.

Also I can confirm to the members here that this clone CSL dme with added H bridge functions exactly like the real thing. I tested my own cloned csl dme on my CSL and it drove exactly like it should!!!

Hats off to the members that got this to work like the real deal!!
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Old Tue, Dec-09-2014, 09:35:22 AM   #42
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Default Re: Converting an MSS54HP into an MSS54HP CSL (H-bridge)

Any updates Terra on MAP sensor compatibility for us MSS54 non-HP members? Otherwise, it seems that the only option rests upon sourcing an MSS54HP ECU from a donor car, performing an h-bridge, then flashing CSL software after adding the necessary hardware components?
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Old Tue, Dec-09-2014, 07:26:31 PM   #43
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Default Re: Converting an MSS54HP into an MSS54HP CSL (H-bridge)

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Originally Posted by TheGenius46M View Post
Any updates Terra on MAP sensor compatibility for us MSS54 non-HP members? Otherwise, it seems that the only option rests upon sourcing an MSS54HP ECU from a donor car, performing an h-bridge, then flashing CSL software after adding the necessary hardware components?
I just converted a MSS54 into a MSS54HP CSL DME and tested on my own CSL and it works perfectly.

You swap the AM29F200 chips for the AM29F400, solder on the H bridge and associated capacitors and change out two resistors on the back of the board (as they are different between HP and non HP DME - actually according to Terra who has done the trace he said there are 4 resistor differences, but you only need to do the two), turn off the injector driver error in the DTC (151 code - this according to Terra is a difference in injector drivers between the HP and non HP, but apparently they all function the same) and flash the CSL software on and it's all good to go - no errors.

If you don't do the resistor change you get error 233 which is map sensor related in CSL software guise. When I first did the conversion I left out the 2 resistors and this was the error it gave me ... the moment I changed them the error disappeared.

I haven't live streamed the data to make sure it is reporting correctly but according to Terra it is.

I will let Terra explain what needs to be done as all credit to him for figuring this out.
All above thanks to Terra for his guidance.

Some photos:

Started with this:


Changed out the AM29F200 to AM29F400, added the H-Bridge (and tested on GT1 to make sure the flapper control works and it does)


Added the capacitors for the H Bridge and changed the Resistors as advised by Terra


Flashed CSL software over WINKFP after virginising the DME


Left, converted MSS54, right MSS54HP CSL conversion


Injector driver difference between the two boards

Last edited by NZ_M3; Tue, Dec-09-2014 at 08:18:14 PM.
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Old Wed, Dec-10-2014, 12:30:25 AM   #44
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Default Re: Converting an MSS54HP into an MSS54HP CSL (H-bridge)

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Originally Posted by NZ_M3 View Post
I just converted a MSS54 into a MSS54HP CSL DME and tested on my own CSL and it works perfectly.

You swap the AM29F200 chips for the AM29F400, solder on the H bridge and associated capacitors and change out two resistors on the back of the board (as they are different between HP and non HP DME - actually according to Terra who has done the trace he said there are 4 resistor differences, but you only need to do the two), turn off the injector driver error in the DTC (151 code - this according to Terra is a difference in injector drivers between the HP and non HP, but apparently they all function the same) and flash the CSL software on and it's all good to go - no errors.

If you don't do the resistor change you get error 233 which is map sensor related in CSL software guise. When I first did the conversion I left out the 2 resistors and this was the error it gave me ... the moment I changed them the error disappeared.

I haven't live streamed the data to make sure it is reporting correctly but according to Terra it is.

I will let Terra explain what needs to be done as all credit to him for figuring this out.
All above thanks to Terra for his guidance.

Some photos:

Started with this:


Changed out the AM29F200 to AM29F400, added the H-Bridge (and tested on GT1 to make sure the flapper control works and it does)


Added the capacitors for the H Bridge and changed the Resistors as advised by Terra


Flashed CSL software over WINKFP after virginising the DME


Left, converted MSS54, right MSS54HP CSL conversion


Injector driver difference between the two boards

HELL YES! Thank you for sharing! And congrats to Terra once again. You are the man!

Can we get this stickied?

Now the FINAL variable of concern... Are the MSS54HP equivalent chips able to be sourced new from a supplier so we don't have to rely on a parts car?
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Old Wed, Dec-10-2014, 03:15:27 AM   #45
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Default Re: Converting an MSS54HP into an MSS54HP CSL (H-bridge)

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Originally Posted by TheGenius46M View Post
HELL YES! Thank you for sharing! And congrats to Terra once again. You are the man!

Can we get this stickied?

Now the FINAL variable of concern... Are the MSS54HP equivalent chips able to be sourced new from a supplier so we don't have to rely on a parts car?
Yes Terra has been most instrumental in getting all this to work and honestly for sharing his knowledge with the masses

The chipset I got were AM29F400BB-50SE

Those last set of numbers denotes the speed of the chip - the lower the number the faster the speed.

If you google you'll find spec sheets on 29F400 chipsets and what the numbers and letters mean.

The CSL DME chips are 55M6 - I've seen anything from a 55 to a 60 in a HP DME and in the non HP anything from a 60 to 90. So they are all a bit random to be honest.

Ironically I was warned not to buy the chipsets from ebay as they can be unreliable. I didn't listen and bought them from ebay (including the H bridge) from what I consider to be reputable sellers and I think I got lucky as both the memory chips and H bridge were genuine and worked the first time.

However, I would still strongly recommend buying from reputable resellers as you really never know with ebay. I was willing to sacrifice this non HP DME in case it didn't work out.
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Old Wed, Dec-10-2014, 04:20:19 AM   #46
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Default Re: Converting an MSS54HP into an MSS54HP CSL (H-bridge)

Might as well post this



Red resistors are the ones you definitely have to change if you want to use the MAP sensor. 7.15 kΩ resistors seem to do the trick there. The yellow ones are also different (10 kΩ on the MSS54HP, 1 kΩ on the non-HP), but they don't appear to effect anything.

Also the onboard pressure sensor is different. You can either install one with the same specs as the MSS54HPs (MPXA6115A or MPXAZ6115A), or you can change the pressure scale (at 0xC476, change "D3 1C" to "C2 5F"). Sorry, forgot to mention that in the emails to you NZ

One thing I want to make clear is that this is still fairly experimental. You're modifying the DME in ways BMW never intended. While I've done a fair bit of testing, it's impossible for me to test all scenarios.

Last edited by terraphantm; Mon, Dec-30-2019 at 09:11:54 PM.
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Old Wed, Dec-10-2014, 05:31:21 PM   #47
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Default Re: Converting an MSS54HP into an MSS54HP CSL (H-bridge)

Terra,

Sent you a PM
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Old Thu, Dec-11-2014, 05:16:36 PM   #48
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Default Re: Converting an MSS54HP into an MSS54HP CSL (H-bridge)

Reason why it would be interesting to experiment. On my car I have an Hbridge modified HP ECU, but I am not running a flap. I have been trying to figure out a 3000rpm stutter, especially in sport mode, and Frank Smith seems to think it is related to having the Hbridge on a car that isn't running the OE flap assembly.

Terra, do you have any issues with the tune on your car? I know you have the flap, but last I knew it wasn't installed.

I would be interested to see if the nonHP ecu converted, without the Hbridge, would alleviate the problem at all.

We currently have it tuned pretty dang well, but every now and again, it shows itself slightly.
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Old Thu, Dec-11-2014, 05:25:53 PM   #49
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Default Re: Converting an MSS54HP into an MSS54HP CSL (H-bridge)

I was having a 3000 RPM stutter, but that ended up being a throttle position sensor issue.

I actually do have the flap installed now, but the stutter was unrelated. In fact, currently I've coded the flap to just open when RPMs are > 100 RPM (in other words, always open... can't get enough of the intake noise lo). It's cold enough right now that I'm pretty sure I don't have to worry about real heat soak too much (the oil temp housing and coolant hoses heating up the sensor are another issue)
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Old Thu, Dec-11-2014, 09:11:17 PM   #50
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Default Re: Converting an MSS54HP into an MSS54HP CSL (H-bridge)

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Originally Posted by cozmo kraemer View Post
Reason why it would be interesting to experiment. On my car I have an Hbridge modified HP ECU, but I am not running a flap. I have been trying to figure out a 3000rpm stutter, especially in sport mode, and Frank Smith seems to think it is related to having the Hbridge on a car that isn't running the OE flap assembly.

Terra, do you have any issues with the tune on your car? I know you have the flap, but last I knew it wasn't installed.

I would be interested to see if the nonHP ecu converted, without the Hbridge, would alleviate the problem at all.

We currently have it tuned pretty dang well, but every now and again, it shows itself slightly.
I've ran an HP DME with no H-bridge in a CSL with the flap control still on the car but just with the DTC removed and it ran fine. Just no flap opening.
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Discussing Converting an MSS54HP into an MSS54HP CSL (H-bridge) in the Coding and Tuning Forum - Discuss all avenues of coding and tuning here! at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)