TechWiki - User contributions [en-gb]

Engine Control Unit

2012-07-26T21:40:14Z

Cybernet: /* Toyota Elises */

{| border=1 cellpadding=5 cellspacing=0
! Car !! ECU !! Protocol/Bus !! Scanner !! Notes
|-
| Elise S1 (120bhp) || MEMS 1.9 || proprietary || LotusScan (Connector SAE J1962) or Rover Test-Book [http://www.omitec.co.uk/products/product-details/SID/Product_IDAWETN/ Omitec] || 12, 10 or 5 pin?
|-
| Elise S1 111S || MEMS 2J || proprietary || LotusScan (Connector SAE J1962) or Rover Test-Book [http://www.omitec.co.uk/products/product-details/SID/Product_IDAWETN/ Omitec] ||
|-
| Elise S1 Sports 160 || GEMS (SVA, 50 cars) or EFi Euro1(EWVTA) ||
|-
| Elise S1 Sports 190 || MEMS 1.9 (or Lotus K4 update kit) || proprietary || LotusScan (Connector SAE J1962) or Rover Test-Book [http://www.omitec.co.uk/products/product-details/SID/Product_IDAWETN/ Omitec] ||
|-
| Exige S1 340R || Lotus "918" ECU (As used in Esprit V8) || K-Line (9141) ||LotusScan2 (Connector SAE J1962) || Manufactured by EFi Technology Srl. ||
|-
| Elise S2 K Series || K4 || K-Line (9141) || LotusScan2 (Connector SAE J1962) || Manufactured by EFi Technology Srl. ||
|-
| Elise S2 K Series VVC || K4 160 || K-Line (9141) || LotusScan2 (Connector SAE J1962) || Manufactured by EFi Technology Srl. ||
|-
| Elise S2 111R Exige S2 || T4 || K-Line (9141)|| LotusScan3 (Connector SAE J1962) ||Manufactured by EFi Technology Srl. ||
|-
| Elise S2 Exige S2 with electronic throttle || T4e || K-Line (9141) MY08 onward CAN|| Lotus Scan3 (Connector SAE J1962) ||Manufactured by EFi Technology Srl. ||
|-
| Elise S2 (1ZR, 2ZR) Evora Evora S Exige S (V6) || T6e || CAN || LotusScan3 (Connector SAE J1962) || Manufactured by EFi Technology Srl. ||
|-
! Non Standard ECUs
|-
| N/A || MEMS 3 || KWP2000
|-
| N/A || Emerald
|}

S1 = For a s1 it's inside the boot on the left as you look at the car, near the bottom but on the back wall, peel back the carpet and you'll see it.
S2 = On a S2 its under the dash on the passenger side above the foot rest.

== K Series Elises ==
[[image:euro1.JPG|thumb|left|EFi Technology EURO1 ECU]]
EFi Technology Srl ( http://www.efitechnology.it ) "Euro1" ECU: Fitted to EWVTA S1 Sport160 cars.
{{clr}}

[[image:LotusK4ECU.JPG|thumb|left|Lotus K4 ECU]]
Lotus K4 Engine Control Unit: fitted to S2 Elise with K-series(i.e. 122ps, 135ps, 158ps VVC, Sport190)
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== Toyota Elises ==
[[image:LotusT4ECU.JPG|thumb|left|Lotus T4 ECU]]
Lotus T4 Engine Control Unit: fitted to all manual throttle controlled Toyota 2ZZ-GE engined cars.
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[[image:LotusT4eECU.JPG|thumb|left|Lotus T4e ECU]]
[[image:T4e top.jpg|thumb|left|Lotus T4e ECU PCB Top]]
[[image:T4e bottom.jpg|thumb|left|Lotus T4e ECU PCB Bottom after milling away tamper-proof cover]]
Lotus T4e Engine Control Unit: fitted to electronically throttle controlled Toyota 1ZZ-FE, 2ZZ-GE and 2ZZ-GZE engined cars.

'''Contains'''
* L9612 K Line Transceiver
* L9822EPD Octal Serial Solenoids
* MC68HC908JL8 CPU HC08 comp.
* MC33394FS CAN Transceiver & Power Mgmt
* MPX4001A Pressure Sensor
* TLE6220 Quad Low-Side Switch
* MPC563 Main CPU (PowerPC Core) - 512kb Flash, 32Kb SRAM
{{clr}}

== Aftermarket ECUs ==
[[image:M3DK.JPG|thumb|left|Emerald M3DK]]
The [[Emerald]] M3DK is a plug compatible replacement ECU for the Rover MEMS unit used on the K series, it utilises the existing engine sensors and works with distributor based systems and distributorless 'wasted spark' systems. It is compatible with the immobiliser as fitted to Elises and Caterhams. It is fully programmable and comes complete with software, manual, comms cable and example maps. It has user tailorable soft and hard cut rev-limits and a user programmable shift light. Narrowband and wideband lambda sensors are supported by utilising the 0-5v analogue input.
{{clr}}

== ECU mapping ==

If you make substantial changes to your car setup or simply want to ensure that the ECU is correctly configured to control the fuel system, then you could consider a "mapping" session on a rolling road.

ECUs generally work by comparing the engine speed in rpm to the position of the throttle. The ECU then compares these values on a "map" to find the correct amount of fuel to add. This ensures that an engine is not running too rich or too lean, both of which can be undesirable with the latter leading to detonation.

The mapping process will involve your car being run on a rolling road for a period of time, with an operator changing the map on the fly. The rolling road will then allow the operator to add the optimum values to the map.

{| border="1"
!Name & Website !! Address & Google map reference
|-
| [http://www.sinclairemotorsport.com Sinclaire Motorsport]
| Sinclaire House, Bryant Avenue, Romford [http://maps.google.co.uk/maps?hl=en&q=RM3+0AP RM3 0AP]
|-
|}

{| border="1"
!Name & Website !! Address & Google map reference
|-
| [http://www.jkm.org.uk/performance/index.htm JKM Performance]
| Bolde Close, Copnor, Portsmouth, Hampshire, [http://maps.google.co.uk/?hl=en&q=PO3+5RD(JKM+Performance) PO3 5RD]
|-
|}

{| border="1"
!Name & Website !! Address & Google map reference
|-
| [http://www.hangar111.com Hangar 111 Lotus Performance]
| Unit8b Seven Acres Business Park, Waldringfield, Suffolk [http://maps.google.co.uk/maps?f=q&source=s_q&hl=en&geocode=&q=Hangar+111&sll=52.058349,1.300786&sspn=0.006306,0.019226&g=IP12+4PS&ie=UTF8&ll=52.058982,1.300786&spn=0.006306,0.019226&z=16&iwloc=A IP12 4UH]
|-
|}

== See Also ==
* http://en.wikipedia.org/wiki/Engine_Control_Unit
* http://en.wikipedia.org/wiki/OBD-II_PIDs
* [http://www.mgfcar.de/library/ENGINE_MANAGEMENT_SYSTEM_%20MPi_VVC_MEMS_3.htm VVC MEM3 usage of sensors]

== Forum links ==
* http://forums.seloc.org/viewthread.php?tid=143423
* http://forums.seloc.org/viewthread.php?tid=71330

== External links ==
* http://www.sae.org/technical/standards/J1962_200204

[[Category:Electrical]]
[[Category:Lotus Elise]]
[[Category:Lotus Evora]]
[[Category:S1]]
[[Category:S2]]
[[Category:Lotus 2-Eleven]]
[[Category:S2 Exige]]

File:T4e top.jpg

2012-07-26T21:36:45Z

Cybernet: T4e from an 1ZZ Car - topside pcb

T4e from an 1ZZ Car - topside pcb

File:T4e bottom.jpg

2012-07-26T21:35:46Z

Cybernet: T4e from an 1ZZ car - showing the MPC563 CPU in the lower right corner.

T4e from an 1ZZ car - showing the MPC563 CPU in the lower right corner.

Stack

2012-07-25T23:33:49Z

Cybernet:

The Instrument binnacle in the Elise is made by a company called 'Stack' and therefore is referred to as 'Stack unit' or just 'Stack'. Late Elise have replaced the Stack with a Shurlok unit.

[[image:elisestack.JPG|thumb|left|S1 Elise Stack Unit]]
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===Resetting===
I recently acquired a GPS and was very shocked to see that my speedo was over-reading by about 10 mph when compared to the GPS. On searching the Tech forum, I realised that this is quite common, and can be simply rectified by resetting the Stack unit as follows:

- Turn off the ignition
- Open the driver's door (yes, really!)
- Press and hold the trip-meter reset button
- Whilst still holding the reset button turn the key in the ignition to the second position (just before the engine turns)

The Stack will then wind both needles back to below the zero position, and the LCD will show the software revision number. Once it's gone through the motions your speedo should then read true!

From my research, this seems to work on all versions of the Elise, including those with Stack and Shurlok instruments.

===Stack Unit - removing unit===
To remove the stack unit it is necessary to first remove the steering column surround which consists of removing its 5?? screws. NOTE: be careful as the odometer reset switch is attached to the surround and it may be possible to damage the two delicate wires connecting it.

Once the steering column surround is removed you should see two 10 or 12mm bolts. Once these are removed the unit should become free apart from the wiring harness connected at the rear. NOTE: be careful at this stage as it is possible to damage the wiring harness if excess weight or force is placed on the cabling

To gain better access to the plug at the rear I removed the cowl surrounding the unit using a small socket set with a universal joint to remove the 4 small nuts. NOTE: It is probably a good idea to try to mark the unit somehow first as the cowl is fitted with elongated holes to allow fine positioning of the cowl surrounding the unit.

The plug at the rear has an upper and lower blue retaining clip. These were relatively easily removed (however be careful they don't fall inside the dash like mine did ;)) The plug itself however was VERY difficult to remove and I had to proceed with patience continuously gently wriggling it until it beame free. This took a long time but eventually worked.

The unit should now be free to remove from the vehicle. To remount the unit I simply reversed the above sequence.

===Stack unit - removing glass===
To remove the perspex window of the stack unit it should first be removed from the vehicle using the above procedure.

The glass is held in place using a black bath sealant type substance and this should be scraped away as best as possible. I, very gently, used a stanley knife blade to separate the perspex window from the plastic surrounding lip. This is a job that should be done very carefully and slowly otherwise there will be obvious damage to the unit. I did this over a period of days as not to become too frustrated with it. When I started to get frustrated with it I went off and had a beer and tried again the next day....not a job to do if you're in a rush!

[[Image:stack_unit_1.jpg|thumb|left]]
{{clr}}

Once I was satisfied that I had removed as much of the black sealant as I could I gently started to insert broken stanley blade segments into the gap and really gently try to lever the perspex out of the unit. I started along the bottom edge and in the bottom corners in case I made any marks on the unit as these areas are somewhat hidden by the steering column surround . NOTE: stanley blades are bloody sharp and you could very easily cut yourself. Don't say I didn't warn you!

[[Image:stack_unit_2.jpg|thumb|left]]
{{clr}}

Once I had managed to lift a corner I continued to separate the black sealant at the back of the perspex. I then added another segment of broken stanley blade to keep it lifted and slowly worked my way round the edge. Be careful not to lever the perspex too much or it might break and i'm not so sure how easy or cheap it would be to get a replacement.

[[Image:stack_unit_3.jpg|thumb|left]]
{{clr}}

[[Image:stack_unit_4.jpg|thumb|left]]
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To refit the glass I managed to find some black bath sealant at my local DIY shop. I first cleaned all of the surfaces as best as I could and then pushed the glass back in place. I then sparingly squeezed some of the sealant around the edge of the glass clearing away the excess immediatlely. I decided not to put any sealant behind the glass as the glass already seemed a reasonably tight fit and just in case i had to do the same job next week, It is a Lotus after all! I just put enough around the edge to seal it so that moisture, condensation etc shouldn't be able to get in.

My best advice is to take your time with this job. It's a bit long but i think the slower you do it the less likely you are to damage the unit. Good luck!

===S1 Stack Glass===
If you need to replace the Glass(Lens) on your S1's Stack, you can get this (already painted of couse) directly from Stack for £50.00 ex vat and shipping.

Contact:
sales@stackinc.com or sharon.drew@stackltd.com

(As of Oct 25, 2008, STACK no longer sell the replacement Glass) but elise-shop.com started to sell the glasses. You can find them here: [http://www.elise-shop.com/stack-replacement-glass-elise-s1-exige-s1-p-354087.html ..here..]

===Return to Zero===
There appears to be an undocumented software feature in the stack firmware which returns the odometer value back to zero. A very handy feature indeed but unfortunately the procedure required to perform this functionality is currently unknown..

* http://arc.seloc.org/viewthread.php?tid=121480

<gallery>
Image:Stack return to zero.jpg|S2 Stack display after odometer reset
</gallery>

=== CAN Bus API for PI Shurlok Clusters ===

* http://www.warp.at/lotus

===Also See===
[http://www.stackltd.com/ Stack's WebSite]

[http://www.cishurlok.com/ Shurlok's WebSite]

[http://en.wikipedia.org/wiki/Dashboard#Dashboard_items Dashbord Instrument cluster]

[[Category:Interior]]
[[Category:Electrical]]
[[Category:Lotus Elise]]
[[Category:S1]]
[[Category:S2]]