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tomlil01
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Easimap - TPS

Hi,

Hoping someone might be able to offer some advice. I'm looking to adjust the Throttle Position Sensor on my car, as I am getting bad throttle response/kangarooing at low revs.  Up until now I have taken the car to a specialist to get this sorted (along with balancing the throttle bodies), but it seems to not last long before I get problems again, so I want to learn to adjust the TPS and balance the RB)

I understand from other posts that I should be able to check the TPS voltage with "easimap" software, by connecting my laptop to my ECU. I ordered an MBE CAN mapping kit, and received this today, but it wasn't until I went to connect it that I found that the garage had installed a serial cable onto the ECU instead of a OBD.

The guys who sold me the CAN mapping kit said that I can get a OBD connector (which I can wire into the back of my  ECU plug in place of  the serial cable), then I Can use the mapping kit

Should this work, or is there some reason why the garage attached a serial cable instead? Am I on the right track? The car is a 2004 R300 k-series (with RBTB). There doesn't seem to be anything helpful written on the ECU itself.

Thanks

Lee

aerobod
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If you have a 967 ECU, it will be serial only, anything newer than that (such as 992 or 9A4) is CAN and likely has an OBD connector.

The ECU may have the type in the name on the label or model number, but from a wiring perspective, if the serial connection traces back to pin 14 and 32 on the connector, it is a serial ECU, if it traces back to pin 8 and 9, it is CAN. Either connection will likely also have a ground, which is likely pin 7. On the connector pins 14 & 32 are vertically next to each other, pins 8 & 9 are horizontally next to each other on the top row.

If it is a serial 967, then you need to use Easimap 5, if not Easimap 6 can be used.

James

tomlil01
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Hi, Thanks for that. Very helpful. I just checked again and mine is a 967. So, the CAN connector (box) that I bought is no good? What do I need in terms of connecting to the serial connector? Thanks Lee
aerobod
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Might be worth PMing Kimble, the R400K with 967 would likely be the same install: https://www.lotus7.club/forum/techtalk/easimap-help-r400k

James

Kimble
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I think you will need this cable as your OBD box won't work:

https://www.sbdmotorsport.co.uk/MBE-MAP-LEAD-mapping-lead-for-mbe-serial-based-ecus.html

and as James says you will need to connect this to Easimap 5:

https://www.sbdmotorsport.co.uk/easimap%205%20software-easimap-5-software.html

You then need to connect to a PC. This is where it gets a bit more complicated.

Easimap is Win32 so you will need Win XP/7/Vista/10 32 Bit installed, ideally on a laptop with a serial port.  If you don't have a serial port then you can use a USB to Serial converter but there are mixed results on these depending on your laptop and the cable.

This was recommended (https://www.ebay.co.uk/itm/111598110253)  but is currently out of stock although looks to be available here:

https://www.startech.com/en-gb/cards-adapters/icusb232d

I am currently having some mixed results with this.

https://www.amazon.co.uk/gp/product/B00QUZY4UG/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1

Out of interest, where are you based?  If you are around Surrey I'm fine for you to come and give my cable a go and see what results you get.

Cheers,

Neil

 

 

GulfSeven
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Quick related question - is this palaver similar for setting the TPS on a 301R.

I just had mine recalibrated under warranty while it was having a few other issues addressed, but wondered if it needs doing in the future is it something I can do at home?

Tim.

Gulf Racing 310R

Dixa1225
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If you have the easymap lead & the software then no problem to adjust at home. 

Kimble
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I'm not sure what year your car is but, in theory, the later the car the easier it should be.  This hassle is mainly related to an old serial interface.

rj
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310 will be CANbus

The inteface recommended by Richard should arrive today, but I don't think I'll be able to test the next couple of days

tbirds search:

Blatchat Google Search

Richard Price
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In reply to post #5

I am currently having some mixed results with this.

https://www.amazon.co.uk/gp/product/B00QUZY4UG/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1

That is why I recommended the Startech device. I had tried various USB to RS232 adaptors with limited success, but found the Startech ICUSB232D worked reliably on my Win7Pro 32bit laptop when using Easimap 5.5 to upload/download from/to 967's

 

Kimble
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The ebay store took my order, reported 3 day delivery then when I chased they said they didn't have stock and weren't sure when they would have some!  I managed to find them in stock on Amazon and have one arriving today.  I'll report back on my findings.

https://www.amazon.co.uk/gp/product/B00QL16ONE/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1