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BK

Haltech Elite 2500 firmware 2.34.00

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I though I'd keep this one to myself until yesterday when a resolution was reached and confirmed.

If anyone has an Elite 2500 I suggest you upgrade to the latest 2.34.00 firmware and ESP 2.42 software immediately, and preferably do it with your coilpacks unplugged or at least the coilpack power feed unplugged.

On the blue 2.8 Nitro 32 during a firmware update about six weeks ago I had a slight issue where during the update to my 2500, my coilpacks harness and main engine loom decided to smoke, catch fire and melt. Completely destroyed main harness along firewall and at coilpacks harness power supply plug. Car was running well before this and are using R35 coilpack upgrade from Godzilla motorsport.

Cause was unknown at this stage so ECU was sent back to Haltech for inspection and test, and ends up testing fine. After post mortem on engine loom discovered the earth wire which carries the coilpack power had melted due to excessive current, taking out the rest of the cables it was loomed with. After bringing this up with Haltech the only conclusion I could reach was that during the firmware update it triggered all six coilpacks to try and charge the primary side simultaneously for an extended period of time without discharging, which in turn will make an excessive amount of current flow through the power supply wires to the loom.

If you look at the coilpack 12v supply the positive is also much larger gauge than the ground wire. Compounding this is issue if you run R35 coilpacks which draw considerably more current than stock coils, if this is to happen the risk of cable failure is increased if all coils decide to charge all at once and then not discharge.

After bringing this to Haltechs attention they decided to retain my Elite for further testing, which confirmed that the coilpack outputs could indeed randomly turn on during the firmware update, as the ECU will be in a state of no configuration while erasing the existing firmware and writing the new one.

After receiving back my 2500, on the 21/10/2019 comes a new firmware 2.34.00 which the first changelog mentioned in it was the rectification of the coilpack outputs switching on during a firmware update.

Car was finally finished off yesterday with the original Elite 2500 on 2.34.00, and a whole new wiring specialties main engine and coil pack loom to replace the fried stock one. Fired up first go, no DTC's and all sensors reporting as normal.

Again, Please do update immediately with your coilpacks unplugged

 

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Ouch. That sort of software "bug" is an absolute bastard to plan for in the hardware and software specification stage and in the programming/testing phase. There are so many possible random such things that could go wrong, it would be hard to imagine them all.

I guess Haltech could take a leaf from the designers of safety critical systems and just make sure that all outputs are off (assumed to be the safe state) at all times when not required - which would be especially true of those edge cases where the ECU program is not actually in charge, ie during flashing. Just needs one or two interlocks to be put in place.

It's surprising that they can fix it just with a firmware update though - so maybe they have already had the physical side of it in place in the original design, older firmwares were doing it properly and somewhere along the way the software side of it got lost or bugged out.

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Thank you for that!

Haltech updates sometimes do extremely strange things, not long ago I upgraded the firmware and somehow after the upgrade all my I/O mappings vanished!

Luckily Haltech auto saves maps for you, so imported it back in.

They need to get Andy from Adaptronic (which is pretty much Haltech now) to allow Haltechs to be accessed without the need to be powered up. I remember with the old 440D Adaptronic you could just power it up with a USB and load/mod the map however you wanted it before you even connected it up.

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Yeah it would be good to access the ECU while car is off, and ECU was USB powered. The new ESP 2.42 software, which was only released Monday 28/10 also won't upgrade from the old ESP. Have to completely uninstall 2.41 or earlier and fresh install 2.42 ESP. Doesn't erase any saved maps though as they are saved elsewhere.

There is also a bug in the ESP software on the knock control long term trim, which sometimes doesn't apply timing changes permanently to the base ignition map when applied.  Won't melt an engine loom though which was an absolute bastard of a job to replace.

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Does it just need main 12V supply to be able to flash? Maybe they should sell a connector that allows you to connect a small motorcycle battery to power the ECU without connecting to the rest of the car.

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A flash mode switch on the ECU, either hardware or software, would be easier.

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I just did mine, disconnected the igniter and main plug for the coil harness, no issue 

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Good stuff. Probably never hear of this issue again after this firmware.

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On 06/11/2019 at 7:50 PM, r32-25t said:

I just did mine, disconnected the igniter and main plug for the coil harness, no issue 

But did you enable rolling anti-lag? Need bang bangs on gear shift 

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Nope no anti lag, really need to pull my finger out and work on it 

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