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Old 10-01-2013, 04:02 PM   #1
Soarer
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Default 2002 WRX ECU Won't Flash

I'm helping a buddy put his car back to stock and am having a lot of trouble connecting to the ECU. The car was tuned last year at The Shop by Junior (I was told by my buddy) for stage 3. All the supporting mods have been removed and put back to stock now and the last piece of the puzzle is flashing a stock map back on the ECU. Whenever I try to reflash, I get this error: [16:37:03.983] denso02_bootloader_cmd_start
[16:37:05.311] denso02_bootloader_cmd_start
[16:37:06.577] denso02_bootloader_cmd_start
[16:37:07.811] denso02_bootloader_cmd_start
[16:37:09.046] denso02_bootloader_cmd_start
[16:37:09.499] kernel get version
[16:37:09.827] interface close
[16:37:09.827] interface close

The ECU is going into test mode (CEL flashing, fans cycling, etc) and I've got the green connectors connected and the flash block plugged in. I've tried timing the flash and key-on a hundred different ways but get the same result.

I then pulled the ECU out of my car (also a 2002 WRX ECU) and installed it in my buddy's car. It flashed first time with no problem. So, my question is, what could be preventing the original ECU from flashing?
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Old 10-02-2013, 08:13 AM   #2
quazimoto
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Are you using a genuine Tactrix cable?
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Old 10-02-2013, 09:47 AM   #3
Soarer
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Quote:
Originally Posted by quazimoto View Post
Are you using a genuine Tactrix cable?
Yessir
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Old 10-02-2013, 11:38 AM   #4
DOHOSS
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the trick is not to jam the Tactrix in the ob2 port...dont push it all the way in and turn the key and make sure the fans dont cycle..and always test write first...works for me all the time...ps be gentle
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Old 10-02-2013, 06:53 PM   #5
cDorch
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As DOHOSS said, make sure the tactrix is not jammed in. I have a lot of trouble on my 02 and before I flash it, I generally have to wiggle the tactrix. I usually open the RR logger or learning view to make sure I can connect to the ecu then close out and try to flash it.
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Old 10-02-2013, 07:56 PM   #6
Soarer
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Very confident it's not the cable as I swapped in a different ecu and it flashed first attempt no problem.
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Old 10-02-2013, 08:05 PM   #7
rexworx
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are you sure the ecu isnt locked? Ecutek locked tune from back in the day etc...
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Old 10-02-2013, 09:33 PM   #8
Soarer
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Quote:
Originally Posted by rexworx View Post
are you sure the ecu isnt locked? Ecutek locked tune from back in the day etc...
That sounds like a good possibility. I know zero about ecutech. How would I unlock it if it were tuned using ecutech?

Junior that works at The Shop in Norwalk and a few other shops around ny and ct tuned it. I wish I had contact info for him. Does anyone know his username on NASIOC?
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Old 10-04-2013, 10:56 AM   #9
leforce
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I'm having the exact same problem with an 03 JDM STi, I know that ECUflash doesn't work on an Ecutek'ed ECU, but what about RR logger & learning view? In my case, nothing is communicating with the ECU!
I don't think it's Ecutek with your case, since you were able to flash it on a different car.
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Old 10-04-2013, 10:56 AM   #10
leforce
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I'm having the exact same problem with an 03 JDM STi, I know that ECUflash doesn't work on an Ecutek'ed ECU, but what about RR logger & learning view? In my case, nothing is communicating with the ECU!
I don't think it's Ecutek with your case, since you were able to flash it on a different car.
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Old 10-04-2013, 11:54 AM   #11
mikeyPSF
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Frequently (but not always) if the logging trace ends in "Interface close" it indicates the ECU is locked. It sounds like everything else you're doing is 100% right. In particular if you swap in another ECU and your able to reflash it then you know everything in the circuit is correct.

I would assume it's locked and move forward by getting another ECU. You might be able to ship it to EcuTek to have the lock removed or maybe the original tuner could do that, but you could also go on car-part.com and find a replacement for ~$60. This year doesn't have the complication of the immobilizer so I'd go that route for the least effort.
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Old 10-04-2013, 04:02 PM   #12
leforce
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I think it's the other way around, op said he installed his ecu in a different car & was able to flash it.
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Old 10-04-2013, 04:06 PM   #13
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Right, I was suggesting that for his buddy's car, they should source another ECU since his ECU in that car showed that there is no issue with the wiring, adapters, or OpenPort.
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Old 10-04-2013, 06:14 PM   #14
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Quote:
Originally Posted by leforce View Post
I think it's the other way around, op said he installed his ecu in a different car & was able to flash it.
Nope , other way round. I installed a spare ecu in the original car and was able to flash.

I even tried putting the trouble ecu in a different car and it gave me the same error message.

This is definitely an issue tied to this specific ecu, not wiring etc.
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Old 10-04-2013, 06:15 PM   #15
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Mikey,
A very good suggestion. I didn't know 2002 wrx ecus could be had so cheaply. Thanks!
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Old 10-08-2013, 01:32 PM   #16
gtx matt
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Chuck, I had the same problem with my ECU, and other people have the same issue with the 02 ECU. What I found is that it would work if I clicked flash with the key off, and as soon as I saw the third line of code that says "denso02_bootloader_cmd_start" I would flip the key forward. Worked like that for a while, and then I realized I could go back to flashing normally by just trying it. If the timing isn't perfectly after the third line it doesn't work.

Since then I developed the low voltage error though, not sure if the events were related. I have to jump 12V to the ECU to flash again, but I took out second gear in my tranny so it will have to wait.
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Old 10-08-2013, 01:59 PM   #17
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Good tip Matt. These early WRX ECUs do seem to be more susceptible to the timing of when you attempt to read/write. Things tend to work better if you initiate the read/write shortly after turning the key to 'ON'. This tends not to be a problem with newer ECUs.
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