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HowTo: Convert M52TU Engine to MS43: Difference between revisions
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First question to answer would be: Why do all this, when your engine is running fine? | |||
Answer to this is: MS43 is the faster ECU, has a lot more analog inputs, better tuning support, a significantly less often failing throttlebody assembly and last but not least no for custom firmware like MS43X. | |||
Engine wise the M52TU is almost the same as its successor the M54. Except for the throttle body and accelerator pedal it shares all sensors with MS43 powered M54. | |||
This procedure is not completely plug & play but we try to make it as easy as possible with this guide. | |||
'''Note:''' Currently we have no E39 available for measuring and testing, so all lengths and part numbers will be listed for E46. Please validate E39 part numbers on your own. | |||
== Install Electronic Throttle Pedal == | == Install Electronic Throttle Pedal == | ||
[[File:MS43 Pedal Retrofit.jpg|frameless|MS43 pedal with wiring]] | Regardless of method used to adapt the M52TU wiring to MS43, you have to retrofit a fully electric throttle paddle. | ||
[[File:MS43 Pedal Retrofit.jpg|frameless|400px|MS43 pedal with wiring]] | |||
=== Parts List === | |||
*Mounting plate: | *Mounting plate: | ||
**LHD: 35 42 6 772 703 | **LHD: 35 42 6 772 703 | ||
Line 18: | Line 26: | ||
** Cable: 6m FLRy 0.35mm² (E46 chassis, others may vary) | ** Cable: 6m FLRy 0.35mm² (E46 chassis, others may vary) | ||
=== Pinout === | |||
The electronic accelerator pedal (connector X11400) needs to be connected to MS43 (connector X60004) with six wires of about 1m in length for an LHD E46 chassis others may need longer wires due to the ECU box being on the | The electronic accelerator pedal (connector X11400) needs to be connected to MS43 (connector X60004) with six wires of about 1m in length for an LHD E46 chassis others may need longer wires due to the ECU box being on the other vehicle side or vice versa. | ||
You can use any 0.35mm² cable since there is not much current used by the two potentiometers. We suggest using FLRy type wires with original colors from the table below. | |||
{| class="wikitable" | {| class="wikitable" | ||
|- | |- | ||
Line 61: | Line 67: | ||
| X60004.13 | | X60004.13 | ||
|} | |} | ||
The finished wiring for the electronic throttle paddle will look something like this when finished: | |||
[[File:MS43_Convesion_Wiring_PVS.jpg|frameless|400px|MS43 PVS wiring adapter]] | |||
=== Hardware Install === | |||
== Engine Wiring Modification == | |||
For M52TU to work with MS43 ECU you have two options for the wiring. Both options are valid and you can decide whatever suits your needs better: | |||
*'''Option A''': Maintain M52TU engine wiring and work with adapters | |||
*'''Option B''': Update engine wiring to M54 and solder some cables | |||
If you prefer not having to change the whole wiring loom itself or have soldered connections in the engine wiring, we would advise to stick with the M52TU wiring. Same goes for vehicles that came with an M52TU but never with an M54 like the E38 or if your wiring loom is in a very good condition. | |||
Keeping the M52TU wiring needs an adapter for the throttlebody, while a full M54 wiring conversion needs soldering for the cluster signals and a 4mm² voltage supply line. | |||
== | ----- | ||
=== Option A: Adapt M52TU wiring harness to full DBW throttlebody === | |||
The easiest approach make your engines wiring compatible to MS43 is to create two little adapters, one for the throttlebody and another one for the instrument cluster signals. | |||
[[File:MS42_to_MS43_Complete_Adapter.jpg|frameless|400px|M52TU MS43 adapter]] | |||
==== Throttlebody Adapter ==== | |||
The throttlebody adapter is a bit more complicated to make, because is involves drilling the connector housing. | |||
==== Cluster Signal Adapter ==== | |||
Vehicles equipped with MS42 have 4 | Vehicles equipped with M52TU and MS42 have 4 cluster signal wired through the ECU plug from connector X60003 to connector X60004.: | ||
*Oil Pressure Switch | *Oil Pressure Switch | ||
*Charge Control Light | *Charge Control Light | ||
Line 77: | Line 98: | ||
*Engine Start Signal | *Engine Start Signal | ||
These signal wires need to be depinned from the | These signal wires need to be depinned from the connectors housings and connected with each other. A very easy solution would be cutting them and solder them together, but that makes it impossible to remove the engine wiring in the future. | ||
A better way is | A better way is keeping the MQS terminal in place and make an adapter. For this adapter you need two female MQS quadlock 4 way connectors and two male ones with matching terminals. | ||
'''Parts needed:''' | '''Parts needed:''' | ||
*Female Connector | *2x Female Connector: BMW 61 13 2 359 994 | Tyco 1241634-1 | ||
*Male Connector: | *2x Male Connector: BMW 61 13 6 925 611 | Tyco 0-1452576-9 | ||
*Male Terminals: 8x Tyco 5-963730-1 (MQS Quadlock 0.50mm² - 0.75mm²) | *8x Male Terminals: 8x Tyco 5-963730-1 (MQS Quadlock 0.50mm² - 0.75mm²) | ||
* | *0.5-1m FLRy wire | ||
The goal is to have a male to male connector that acts as a gender changer for the female connections you depinned previously, something like this: | |||
[[File:MS42_to_MS43_Cluster_Signals_Adapter.png|frameless|400px|MS43 cluster signal adapter]] | |||
The pinout doesn't matter as long as you maintain a straight 1:1 connection. To make things easier, here is a suggested pin assignment: | |||
*Pin 1: Oil Pressure Switch (brown/grey) | |||
*Pin 2: Charge Control Light (blue) | |||
*Pin 3: Oil Level Sensor Signal (grey/blue) | |||
*Pin 4: Engine Start Signal (black/yellow) | |||
Now click the depinned terminals into the female connectors and secure the second locking mechnism. Once you are done it will look something like this: | |||
----- | |||
=== Option B: Change Engine Wiring Loom To M54 === | |||
'''X6011 - Engine Signals''' - 8 way black connector | '''X6011 - Engine Signals''' - 8 way black connector | ||
{| class="wikitable" | {| class="wikitable" |
Latest revision as of 15:37, 9 February 2024
First question to answer would be: Why do all this, when your engine is running fine?
Answer to this is: MS43 is the faster ECU, has a lot more analog inputs, better tuning support, a significantly less often failing throttlebody assembly and last but not least no for custom firmware like MS43X.
Engine wise the M52TU is almost the same as its successor the M54. Except for the throttle body and accelerator pedal it shares all sensors with MS43 powered M54.
This procedure is not completely plug & play but we try to make it as easy as possible with this guide.
Note: Currently we have no E39 available for measuring and testing, so all lengths and part numbers will be listed for E46. Please validate E39 part numbers on your own.
Install Electronic Throttle Pedal
Regardless of method used to adapt the M52TU wiring to MS43, you have to retrofit a fully electric throttle paddle.
Parts List
- Mounting plate:
- LHD: 35 42 6 772 703
- RHD: 35 42 6 772 704
- Accelerator pedal:
- Automatic: 35 42 6 786 281
- Manual: 35 42 6 786 282
- Connector and cabling:
- Connector: BMW 61 13 8 383 300 (Tyco 1-967616-1)
- Terminals: 12x Tyco 5-963727-1 (MQS Quadlock 0.35mm²)
- Cable: 6m FLRy 0.35mm² (E46 chassis, others may vary)
Pinout
The electronic accelerator pedal (connector X11400) needs to be connected to MS43 (connector X60004) with six wires of about 1m in length for an LHD E46 chassis others may need longer wires due to the ECU box being on the other vehicle side or vice versa.
You can use any 0.35mm² cable since there is not much current used by the two potentiometers. We suggest using FLRy type wires with original colors from the table below.
Pedal Side Pin | Signal Name | Color | ECU Side Pin |
---|---|---|---|
X11400.1 | M_FWG1 | brown/green | X60004.7 |
X11400.2 | M_FWG2 | brown | X60004.12 |
X11400.3 | U_FWG2 | yellow/green | X60004.14 |
X11400.4 | A_FWG1 | white | X60004.8 |
X11400.5 | U_FWG1 | yellow | X60004.9 |
X11400.6 | A_FWG2 | white/green | X60004.13 |
The finished wiring for the electronic throttle paddle will look something like this when finished:
Hardware Install
Engine Wiring Modification
For M52TU to work with MS43 ECU you have two options for the wiring. Both options are valid and you can decide whatever suits your needs better:
- Option A: Maintain M52TU engine wiring and work with adapters
- Option B: Update engine wiring to M54 and solder some cables
If you prefer not having to change the whole wiring loom itself or have soldered connections in the engine wiring, we would advise to stick with the M52TU wiring. Same goes for vehicles that came with an M52TU but never with an M54 like the E38 or if your wiring loom is in a very good condition.
Keeping the M52TU wiring needs an adapter for the throttlebody, while a full M54 wiring conversion needs soldering for the cluster signals and a 4mm² voltage supply line.
Option A: Adapt M52TU wiring harness to full DBW throttlebody
The easiest approach make your engines wiring compatible to MS43 is to create two little adapters, one for the throttlebody and another one for the instrument cluster signals.
Throttlebody Adapter
The throttlebody adapter is a bit more complicated to make, because is involves drilling the connector housing.
Cluster Signal Adapter
Vehicles equipped with M52TU and MS42 have 4 cluster signal wired through the ECU plug from connector X60003 to connector X60004.:
- Oil Pressure Switch
- Charge Control Light
- Oil Level Sensor Signal
- Engine Start Signal
These signal wires need to be depinned from the connectors housings and connected with each other. A very easy solution would be cutting them and solder them together, but that makes it impossible to remove the engine wiring in the future.
A better way is keeping the MQS terminal in place and make an adapter. For this adapter you need two female MQS quadlock 4 way connectors and two male ones with matching terminals.
Parts needed:
- 2x Female Connector: BMW 61 13 2 359 994 | Tyco 1241634-1
- 2x Male Connector: BMW 61 13 6 925 611 | Tyco 0-1452576-9
- 8x Male Terminals: 8x Tyco 5-963730-1 (MQS Quadlock 0.50mm² - 0.75mm²)
- 0.5-1m FLRy wire
The goal is to have a male to male connector that acts as a gender changer for the female connections you depinned previously, something like this:
The pinout doesn't matter as long as you maintain a straight 1:1 connection. To make things easier, here is a suggested pin assignment:
- Pin 1: Oil Pressure Switch (brown/grey)
- Pin 2: Charge Control Light (blue)
- Pin 3: Oil Level Sensor Signal (grey/blue)
- Pin 4: Engine Start Signal (black/yellow)
Now click the depinned terminals into the female connectors and secure the second locking mechnism. Once you are done it will look something like this:
Option B: Change Engine Wiring Loom To M54
X6011 - Engine Signals - 8 way black connector
M54 Engine | Cable Color | MS42 Vehicle | Function |
---|---|---|---|
X6011.1 | black | following | Starter Signal |
X6011.2 | green/brown | following | Terminal 15 |
X6011.3 | brown/grey | X60004.11 | Oil Pressure Switch |
X6011.4 | blue | X60004.13 | Charge Control Light |
X6011.5 | grey/blue | X60004.21 | Oil Level Sensor |
X6011.6 | black/yellow | X60004.02 | Engine Start Signal |
X6053 - Voltage Supply 8 way white connector
M52TU cars dont have seperated +12V lines for ignition coils and injection valves, so you have to combine pin 7 (red/yellow) with pin 2 (red/white/yellow).