bingoking Posted October 20, 2017 Report Share Posted October 20, 2017 Simple question but I don't know the answer. Quote Join Lotus Enthusiasts Group Scotland here! and on Facebook Link to comment Share on other sites More sharing options...
sailorbob Posted October 20, 2017 Report Share Posted October 20, 2017 Behind the glovebox. Quote Link to comment Share on other sites More sharing options...
bingoking Posted October 20, 2017 Author Report Share Posted October 20, 2017 Ok thanks Quote Join Lotus Enthusiasts Group Scotland here! and on Facebook Link to comment Share on other sites More sharing options...
bingoking Posted October 20, 2017 Author Report Share Posted October 20, 2017 Well I found the socket and plugged in my scanner but it comes up with a Linking error. The scanner I am using is a MaxiScan MS300 by Autel, and guess what, I can't find the instruction book. The scanner works on my Evora and also on my wife's Audi A3 so why not the Esprit? Quote Join Lotus Enthusiasts Group Scotland here! and on Facebook Link to comment Share on other sites More sharing options...
march Posted October 20, 2017 Report Share Posted October 20, 2017 There are 2 sockets on the V8 (well there are on mine) - a second one is attached to the side of the relay box in the boot (I tend to use that one). May be worth trying that socket. Quote Link to comment Share on other sites More sharing options...
bingoking Posted October 21, 2017 Author Report Share Posted October 21, 2017 22 hours ago, march said: There are 2 sockets on the V8 (well there are on mine) - a second one is attached to the side of the relay box in the boot (I tend to use that one). May be worth trying that socket. Thanks Mark, I did find the other socket but still getting the Linking Error message. Must be my scanner I think. Quote Join Lotus Enthusiasts Group Scotland here! and on Facebook Link to comment Share on other sites More sharing options...
LotuStuart Posted June 21, 2018 Report Share Posted June 21, 2018 my 2001/2 model year Esprit does not have a front OBD socket. Unless someone with an RHD car can pinpoint a location (and prove Sparky and me wrong of course...which I would prefer to only having one!) I'm a bit stumped. Quote Link to comment Share on other sites More sharing options...
Gold FFM Sparky Posted June 21, 2018 Gold FFM Report Share Posted June 21, 2018 I went so far in, I needed a rope tied around me so Stuart could pull me out. I'm convinced they're not there! On a bright note, we now know it's not his ECU. Quote British Fart to Florida, Nude to New York, Dunce to Denmark, Numpty to Newfoundland. And Shitfaced Silly Sod to Sweden. Link to comment Share on other sites More sharing options...
LotuStuart Posted June 21, 2018 Report Share Posted June 21, 2018 16 minutes ago, Sparky said: I went so far in, I needed a rope tied around me so Stuart could pull me out. I'm convinced they're not there! On a bright note, we now know it's not his ECU. It was like a scene from Poltergeist. 1 Quote Link to comment Share on other sites More sharing options...
LotuStuart Posted June 23, 2018 Report Share Posted June 23, 2018 Found it. Cable tied behind the speaker. Quote Link to comment Share on other sites More sharing options...
Gold FFM Sparky Posted June 23, 2018 Gold FFM Report Share Posted June 23, 2018 Kinell! 1 Quote British Fart to Florida, Nude to New York, Dunce to Denmark, Numpty to Newfoundland. And Shitfaced Silly Sod to Sweden. Link to comment Share on other sites More sharing options...
swindon_alan Posted January 10, 2020 Report Share Posted January 10, 2020 On the subject of OBD sockets, I have long been slightly mystified by the additional three wires on the rear (boot) connector. The front one doesn't have them? In the course of digging around on my Kelsey Hayes EBC work (and connections to the ECM) I came across what I believe is the answer. This is from a third party (non car model specific) EFI MT-501 document: In the OBD2 spec these pins are listed as "manf. discretion/OEM reserved". Now, as the MT-501 natively supports CAN, I'm thinking that perhaps Lotus either implemented CAN or put the connections in for potential future use, as the later spec was an incoming preferred standard in 1996. So as well as the the K-Line Protocol Numbers 4 and 5 on pin 72 that we all use with ELM 327 adapters there might be an alternative high speed interface. Another option might be that it was used to upload the V8 specific configuration into PROM. Something to chew on. I might investigate further when Nelson gets his eye back. Anyway, mystery solved for now. Quote I tempted fate...now my Esprit V8 IS in bits...(sob) Link to comment Share on other sites More sharing options...
sailorbob Posted January 10, 2020 Report Share Posted January 10, 2020 I suspect those three pins are for programming the ECU. Quote Link to comment Share on other sites More sharing options...
swindon_alan Posted January 10, 2020 Report Share Posted January 10, 2020 I suspect that your suspicions are correct Derek: The MT-501 has those pesky ST M29F010B 1Mbit EEPROMS in PLCCs that you have to remove, fit sockets and replace if you want to change the maps. Taking a cue from Esprit Engineering: Now I know this (and we have a Write Enable line identified), I reckon there's a possibility of doing the reprogramming myself without opening the ECM up. This is the pin out from the EFI wiring loom that has multiple connectors for this, a dashboard and a data logger - all using CAN. Easy enough to knock up an interface cable. Also digging through the documentation and thinking about it, the K-Line and CAN data streams both use pin 72 on the ECM/pin 7 on the DLC connector. The CAN_H/CAN_L and WR EN are used to enable this (but again, only on the rear DLC connector). I wonder if I can get hold of the original MT-501 utility software, it comes on a "single high density floppy disk" apparently. Good job I still have a 3.5" FD USB drive..! Quote I tempted fate...now my Esprit V8 IS in bits...(sob) Link to comment Share on other sites More sharing options...
sailorbob Posted January 10, 2020 Report Share Posted January 10, 2020 ECU access for programming will almost certainly be password protected. Quote Link to comment Share on other sites More sharing options...
swindon_alan Posted January 10, 2020 Report Share Posted January 10, 2020 So it is also a good job that I have a password cracker then Derek! Assuming that it doesn't have much in the way of a defence (time outs/lock on fails etc.) Quote I tempted fate...now my Esprit V8 IS in bits...(sob) Link to comment Share on other sites More sharing options...
Espritv8black Posted March 16, 2021 Report Share Posted March 16, 2021 Those 3 pins are in all OBDII sockets in all cars. They are manufacturer or Mark specific so that when a manufacturer has specific technology that they don't want others to be able to see they access the data through these 3 pins. All have these 3 pins, Ferrari, Lamborghini, Corvette etc. Quote Link to comment Share on other sites More sharing options...
Project M71 Posted November 15, 2021 Report Share Posted November 15, 2021 On 10/01/2020 at 14:05, swindon_alan said: Hi swindon_alan, Can you share the third party (non car model specific) EFI MT-501 document I suspect that your suspicions are correct Derek: The MT-501 has those pesky ST M29F010B 1Mbit EEPROMS in PLCCs that you have to remove, fit sockets and replace if you want to change the maps. Taking a cue from Esprit Engineering: Now I know this (and we have a Write Enable line identified), I reckon there's a possibility of doing the reprogramming myself without opening the ECM up. This is the pin out from the EFI wiring loom that has multiple connectors for this, a dashboard and a data logger - all using CAN. Easy enough to knock up an interface cable. Also digging through the documentation and thinking about it, the K-Line and CAN data streams both use pin 72 on the ECM/pin 7 on the DLC connector. The CAN_H/CAN_L and WR EN are used to enable this (but again, only on the rear DLC connector). I wonder if I can get hold of the original MT-501 utility software, it comes on a "single high density floppy disk" apparently. Good job I still have a 3.5" FD USB drive..! Quote Link to comment Share on other sites More sharing options...
Project M71 Posted November 18, 2021 Report Share Posted November 18, 2021 I've got the Data Sheet for the AM29F010-70JC Flash chips and and I'm wondering if some of the issues with MT-501 ECUs that fail to reflash could be poor connections to pin 31 on the soldering on the sockets, as this is WE Write Enable line... Quote Link to comment Share on other sites More sharing options...
Gold FFM Barrykearley Posted November 18, 2021 Gold FFM Report Share Posted November 18, 2021 From memory you can also lock those chips and make reflash impossible. Quote Only here once Link to comment Share on other sites More sharing options...
Project M71 Posted November 18, 2021 Report Share Posted November 18, 2021 (edited) This is possible with the device (quotes below from Data Sheet attached) but this wouldn't apply to new, blank chips... Sector Protection/Unprotection The hardware sector protection feature disables both program and erase operations in any sector. The hardware sector unprotection feature re-enables both program and erase operations in previously protected sectors. Sector protection/unprotection must be implemented using programming equipment. The procedure requires a high voltage (VID) on address pin A9 and the control pins. Details on this method are provided in a supplement, publication number 22337. Contact an AMD representative to obtain a copy of the appropriate document. The device is shipped with all sectors unprotected. AMD offers the option of programming and protecting sectors at its factory prior to shipping the device through AMD’s ExpressFlash™ Service. Contact an AMD representative for details. It is possible to determine whether a sector is protected or unprotected. See “Autoselect Mode” for details. Hardware Data Protection The command sequence requirement of unlock cycles for programming or erasing provides data protection against inadvertent writes (refer to the Command Definitions table). In addition, the following hardware data protection measures prevent accidental erasure or programming, which might otherwise be caused by spurious system level signals during VCC power-up and power-down transitions, or from system noise. RS_AM29F010-70JC.pdf Edited November 18, 2021 by Project M71 Quote Link to comment Share on other sites More sharing options...
Project M71 Posted November 18, 2021 Report Share Posted November 18, 2021 (edited) The MT-501 firmware does allow password protection of the two tables but again this wouldnt apply to a blank chip Edited November 18, 2021 by Project M71 Quote Link to comment Share on other sites More sharing options...
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