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Thread: Can't read PCM after BBL upgrade.

  1. #21
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    just an update on my last post (one immediatly above this one), i just tried an lb7 pcm on test bench, gives same error
    (Error: DAta length is 4096 bytes) but if left to run full course still gives a good read (or at least the data appears good in the tuning tool)

  2. #22
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    Same thing here. I cannot reflash my PCM either (2002 F-body). The problem is I think... the firmware is being reported as version " Interface firmware version: 10.5.2". I try to flash and it says I have the wrong firmware version. Looks like a type was made somewhere? I think it is supposed to be 1.05.2 not 10.5.2? Just a guess. Shit. I wanted to do some RAFIG in this cold weather we are having. :(

    One thing I also noticed... in this version of firmware, in my EFILive_hapi utility... the USB buffer has be reduced to 64 bytes? I set it back to 8192 like before. Still had no success... but I thought I should mention it.
    Last edited by Goldfinger911; December 1st, 2007 at 12:22 PM.

    2002 WS6, All-Lunati 383 Strok'r @11:1, Cartek Heads, Keith/Ross Racing Custom Cam, Victor Jr., 492whp 457wtq,
    Cartek Clutch, 9" Moser w/4.11's, 35 spline Detroit Locker, QA1's, NX, BMR, Tuned w/ EFILive V2 Black Box Logging
    Check Out My Latest Tune File: HERE

  3. #23
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    Quote Originally Posted by mrrattle
    just an update on my last post (one immediatly above this one), i just tried an lb7 pcm on test bench, gives same error
    (Error: DAta length is 4096 bytes) but if left to run full course still gives a good read (or at least the data appears good in the tuning tool)
    I too had the same problem with an 04 Silverado (ERROR: Data length is 4096 Bytes). I let it run and the read was sucessful althouth it was 6MIN 49SEC in length. On the Flash side I received the popup (to reflash this controller must use 2.4.57 or newer. It did not recognize10.5.2.)

    Then I tried an E38 (08-Z06). Same thing on the read (ERR0R: Data length 2048 bytes) Total read time was 5MIN 2SEC.The file looked OK 1.67MB. On the Flash I got the same popup as on VPW controllers (To reflash this controller must use 2.4.57 or newer)
    08 Z06

  4. #24
    Lifetime Member JezzaB's Avatar
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    Quote Originally Posted by 02Z06
    I too had the same problem with an 04 Silverado (ERROR: Data length is 4096 Bytes). I let it run and the read was sucessful althouth it was 6MIN 49SEC in length. On the Flash side I received the popup (to reflash this controller must use 2.4.57 or newer. It did not recognize10.5.2.)

    Then I tried an E38 (08-Z06). Same thing on the read (ERR0R: Data length 2048 bytes) Total read time was 5MIN 2SEC.The file looked OK 1.67MB. On the Flash I got the same popup as on VPW controllers (To reflash this controller must use 2.4.57 or newer)
    It is supposed to be firmware 2.5.10. I think the number s being inverted...

  5. #25
    EFILive Developer Site Admin Blacky's Avatar
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    The "ERROR: Data length is 4096 Bytes" message was a debug message that I left in accidentally - just ignore it. Its not actually an error.

    I'm looking into the firmware version number, I may have updated the version number incorrectly.

    Regards
    Paul
    Before asking for help, please read this.

  6. #26
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    Quote Originally Posted by Blacky
    The "ERROR: Data length is 4096 Bytes" message was a debug message that I left in accidentally - just ignore it. Its not actually an error.

    I'm looking into the firmware version number, I may have updated the version number incorrectly.

    Regards
    Paul
    Hi Paul, If the Error: "Data length is 4096 Bytes" is not an error why are the read times wrong (6min 49sec with VPW) and (5 min 2 Sec with E38-CAN). These times are longer than normal, Correct? Also the firmware message in the flash shows 10.5.2, as JEZZAB pointed out this must be inverted.
    08 Z06

  7. #27
    EFILive Developer Site Admin Blacky's Avatar
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    Quote Originally Posted by 02Z06
    Hi Paul, If the Error: "Data length is 4096 Bytes" is not an error why are the read times wrong (6min 49sec with VPW) and (5 min 2 Sec with E38-CAN). These times are longer than normal, Correct?
    Correct. I havn't noticed a slow down here - I will look at that.

    Quote Originally Posted by 02Z06
    Also the firmware message in the flash shows 10.5.2, as JEZZAB pointed out this must be inverted.
    It appears it has always been sent inverted to the PC with the new 2.5 firmware. I just fixed it now.

    Regards
    Paul
    Before asking for help, please read this.

  8. #28
    Senior Member Tydriver's Avatar
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    Sorry for bringing up a 10 year old archived thread, but it seems relevant as I am having the exact same issue listed above.

    I have been away from the tuning side of things for a very long time, but I bought an EFILive cable early on and I have used it to 'scan' this truck before, but I have never read out (downloaded) the PCM to this point. I have installed eFans and I am trying to activate them on the computer by making the necessary changes and I have an error when the read hits 13%, specifically the following:

    14:06:58.661: Scanning for EFILive FlashScan V1 USB
    14:06:58.678: Autodetect interface ...
    14:06:58.748: Interface firmware version: 1.2.17
    14:06:58.751: Connection to [FSP] interface is OK
    14:06:58.787: Interface firmware model: FSP
    14:06:58.805: Interface firmware version: 1.2.17
    14:06:58.824: Interface firmware date: Jan 18, 2005
    14:06:58.844: FlashScan serial number: 003480755323
    14:06:58.870: Disconnecting ...
    14:06:58.889: Disconnected
    14:06:59.576: Scanning for EFILive FlashScan V1 USB
    14:06:59.590: Autodetect interface ...
    14:06:59.656: Interface firmware version: 1.2.17
    14:06:59.660: Connection to [FSP] interface is OK
    14:06:59.664: Current protocol set to: "SAE J1850 VPW"
    14:06:59.668: Autodetect PCM...
    14:06:59.729: Connection to PCM is OK
    14:06:59.733: Current protocol: "SAE J1850 VPW"
    14:06:59.772: Interface firmware model: FSP
    14:06:59.792: Interface firmware version: 1.2.17
    14:06:59.813: Interface firmware date: Jan 18, 2005
    14:06:59.834: FlashScan serial number: 003480755323
    14:06:59.938: Getting status...
    14:06:59.978: Status: OK.
    14:07:00.911: Bootloader version: LS1B_v1.7R (04DA-6638)
    14:07:00.915: Preparing PCM for reading flash...
    14:07:00.962: PCM seed is: $4E77
    14:07:00.966: Unlock attempt 1 of 1
    14:07:01.110: Initializing PCM...
    14:07:01.916: Initializing PCM, step 1 of 4
    14:07:01.920: Initializing PCM, step 2 of 4
    14:07:02.727: Initializing PCM, step 3 of 4
    14:07:02.731: Initializing PCM, step 4 of 4
    14:07:03.179: Initializing bootloader...
    14:07:03.645: Initializing bootloader, step 1 of 3
    14:07:04.358: Initializing bootloader, step 2 of 3
    14:07:05.071: Initializing bootloader, step 3 of 3
    14:07:05.575: PCM ready for reading flash.
    14:07:05.710: Intel AB28F800B - 1MB
    14:07:14.684: Error: Failed. Controller has returned to normal operation, please retry the operation.
    14:07:15.373: Total time: 00:08
    14:07:15.403: Rebooting PCM... (please wait up to 8 seconds)
    14:07:16.560: PCM has booted successfully...
    14:07:17.565: Clear emisison related DTCs...
    14:07:17.605: Clear DTCs for all modules...
    14:07:18.470: Disconnecting ...
    14:07:18.490: Disconnected
    14:07:26.582: Done!




    More than likely it's operator error on my part as I've been away so long but would be helpful to be able to download and alter this PCM.. Any advice is greatly appreciated.

    Oh I almost forgot here is some additional information:

    I downloaded latest version of EFILive this morning.

    World Manufacturer Index 1GC General Motors Chevrolet Light Truck - USA
    Year of manufacture 3 2003
    Model K1 Full Size Truck 4x4, 1500 (1/2 ton)
    Engine V LR4
    Engine size V 4.8 litre V8 MFI
    Body 4 Two Door Cab
    GVWR E 6001-7000
    Plant Z Fort Wayne, IN
    Sequence 343823 343823




    VIN 1GCEK14V93Z343823
    Serial 0HA0AJMF3149
    Hardware 12580786
    Operating System 12579405
    Calibration 12582603
    BCC YDNK
    Operating System 12579405
    Engine Calibration 12577871
    Engine Diagnostics 12579428
    Transmission Calibration 12585422
    Transmission Diagnostics 12570845
    Fuel System 12578354
    System 12572573
    Speedometer 12572527

    Todd

    1993 BMW 325is <- For Sale
    2003 Silverado LS 4x4 <--- you want to autocross what?
    2005 Avalanche 5.3L LS(EFI Live tuned) <-- my gas hog running on e85 3+ years now
    2012 Subaru Outback (wife's daily)

  9. #29
    EFILive Developer Site Admin Blacky's Avatar
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    Can you locate and send me the (*.blx) trace file that would have been saved when the read failed. It will be in the folder: \Documents\EFILive\V7\Bug Reports

    My first guess is that there is a module on the VPW bus that is not respecting either the "4x speed mode" commands. Try reading without the 4x speed option checked to see if that is the case. (It will just take 4x as long to read)
    If it still fails in 1x speed mode, then there maybe an aftermarket module that is interfering with the read process - if you can find it try disconnecting it or removing power from it by pulling it's fuse.

    I'll know more when you send me the trace file.

    Regards
    Paul
    Before asking for help, please read this.

  10. #30
    Senior Member Tydriver's Avatar
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    The EFILive guys never fail to impress, on a Saturday afternoon Paul chimed in and asked for these files, I sent them and he provided an ever hasty response that fixed the problem. I just wish that the rest of the world was as efficient as the guys here on this forum !

    The problem ended up being an issue related the radio that was installed in the truck. Apparently the previous owner installed a single din POS Sony radio that was combined with a pass thru chime module. Well this is apparently causing 'dirty traffic' on the bus and causing my issue. Paul recommended I pull the fuse for the radio and this indeed fixed the problem.

    Once again, I received excellent service that was highly appreciated. My e-fans are in, the PCM is reflashed to see them.. Now I just need to figure out why they are cycling and I'll be golden !

    Thank you everyone !

    Todd

    1993 BMW 325is <- For Sale
    2003 Silverado LS 4x4 <--- you want to autocross what?
    2005 Avalanche 5.3L LS(EFI Live tuned) <-- my gas hog running on e85 3+ years now
    2012 Subaru Outback (wife's daily)

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