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Thread: Trying to tune 04 monte carlo ss

  1. 10-02-2023 #1
    Professwrx
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    Trying to tune 04 monte carlo ss

    Can anybody help me figure out if I'm missing hardware or having a more fun problem.

    I have an OBDXpro VT that easily connects to my 04 tahoe. I thought it could also read my Monte PCM, but PCM hammer attempts to get the VIN and times out.

    Is this hardware even compatible? I used to use a DHP 10 years ago, but I no longer have the hardware.

    Can somebody hold my hand a bit?

    If it should connect, I'm wondering if I have a BCM issue, but an ELM can read out data to my phone. I don't have cruise control and my power door locks don't unlock, but they will lock. Not sure if it's BCM caused or other issues. I just bought the car 3 days ago.
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  2. 10-02-2023 #2
    kur4o
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    Latest beta of pcmhammer should be able to read 04 monte pcm, unless it is some odd ball year change.
    Do you have a vin or pic of the pcm.
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  3. 10-02-2023 #3
    Professwrx
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    Quote Originally Posted by kur4o View Post
    Latest beta of pcmhammer should be able to read 04 monte pcm, unless it is some odd ball year change.
    Do you have a vin or pic of the pcm.
    How do I get the beta? I have the last release but I saw some new work done for it.

    I don’t even know where the pcm is. I haven’t looked for it but I know it’s not in the air box like my gtp.
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  4. 10-02-2023 #4
    kur4o
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    It might be some newer pcm being used. Do you have a vin to check p/n.

    For latest release check pcmhacking.net
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  5. 10-02-2023 #5
    Professwrx
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    Quote Originally Posted by kur4o View Post
    It might be some newer pcm being used. Do you have a vin to check p/n.

    For latest release check pcmhacking.net
    2g1wz121049342922
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  6. 10-02-2023 #6
    Professwrx
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    I looked around pcm hacking but didn’t see any beta work. Only release 021 which I have already.

    im not that familiar with the site and I’m on my phone so I could have easily missed it if it’s there.
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  7. 10-02-2023 #7
    TriumphR3
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    PCM location:
    It is mounted in the bottom of the actual air box assembly. The airbox will come apart in two places. The front comes off to service the air filter. It also will come apart in the middle so that you can gain access to the PCM.
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  8. 10-03-2023 #8
    kur4o
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    Looks like some connection issue, or obdx cable issue.

    To diagnose you will need some other type of software called Universal Patcher.

    Use the built in logger and check you got any response. Try the dtc tab to see if there is any communication. If bcm freaks out it can spam bus with some long string piece of crap data that makes communication real hard. You can also start pulling fuses to silence other modules, and see if that helps.
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  9. 10-03-2023 #9
    Professwrx
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    Quote Originally Posted by kur4o View Post
    Looks like some connection issue, or obdx cable issue.

    To diagnose you will need some other type of software called Universal Patcher.

    Use the built in logger and check you got any response. Try the dtc tab to see if there is any communication. If bcm freaks out it can spam bus with some long string piece of crap data that makes communication real hard. You can also start pulling fuses to silence other modules, and see if that helps.
    It connected at a basic level


    Connecting (VPW)...
    Connection failed. Check settings
    Connecting (VPW)...
    Connection failed. Check settings
    Connecting (VPW)...
    Protocol2 have connection from client
    J2534 client initializing...
    Initializing J2534 Device
    J2534 client: Device initialization complete.
    Connected to the device, ID: 1
    Connected protocol: J1850VPW Speed: ISO14230
    Removing all filters
    Device initialization complete.
    Versions: Firmware: L*?s, DLL: ", Api: L*?s
    Battery Voltage is: 12.585
    Start logging...
    No profile configured
    Requesting DTC codes for [10] PCM
    Done
    Requesting DTC codes for [10] PCM
    Done
    VIN Code:2G1WZ121049342922
    Waiting for devices... [Done]
    Waiting for devices... [Done]
    Querying modules..J2534 client Message sent fail.
    J2534 WriteMsgs error: ERR_FAILED ()
    .J2534 client Message sent fail.
    J2534 WriteMsgs error: ERR_FAILED ()
    J2534 client Message sent fail.
    J2534 WriteMsgs error: ERR_FAILED ()
    Requesting DTC codes for [10] PCM
    J2534 client Message sent fail.
    J2534 WriteMsgs error: ERR_FAILED ()
    Done
    J2534 client Message sent fail.
    J2534 WriteMsgs error: ERR_FAILED ()
    J2534 client Message sent fail.
    J2534 WriteMsgs error: ERR_FAILED ()
    .Requesting DTC codes for [10] PCM
    Done
    ....Requesting DTC codes for [10] PCM
    Done
    J2534 client Message sent fail.
    J2534 WriteMsgs error: ERR_FAILED ()
    J2534 client Message sent fail.
    J2534 WriteMsgs error: ERR_FAILED ()
    No respond to Query devices message
    J2534 WriteMsgs error: ERR_FAILED ()
    J2534 client Message sent fail.
    J2534 client Message sent fail.
    J2534 WriteMsgs error: ERR_FAILED ()
    J2534 client Message sent fail.
    J2534 WriteMsgs error: ERR_FAILED ()
    J2534 client Message sent fail.
    J2534 WriteMsgs error: ERR_FAILED ()
    J2534 client Message sent fail.
    J2534 WriteMsgs error: ERR_FAILED ()
    .J2534 client Message sent fail.
    J2534 WriteMsgs error: ERR_FAILED ()
    J2534 client Message sent fail.
    J2534 WriteMsgs error: ERR_FAILED ()
    J2534 client Message sent fail.
    J2534 WriteMsgs error: ERR_FAILED ()
    J2534 client Message sent fail.
    J2534 WriteMsgs error: ERR_FAILED ()
    J2534 client Message sent fail.
    J2534 WriteMsgs error: ERR_FAILED ()
    J2534 client Message sent fail.
    J2534 WriteMsgs error: ERR_FAILED ()
    J2534 client Message sent fail.
    J2534 WriteMsgs error: ERR_FAILED ()
    J2534 client Message sent fail.
    J2534 WriteMsgs error: ERR_FAILED ()
    J2534 client Message sent fail.
    J2534 WriteMsgs error: ERR_FAILED ()
    J2534 client Message sent fail.
    J2534 WriteMsgs error: ERR_FAILED ()
    .J2534 client Message sent fail.
    J2534 WriteMsgs error: ERR_FAILED ()
    J2534 client Message sent fail.
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  10. 10-03-2023 #10
    Professwrx
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    [09:58:24:767] PCM Hammer 021
    [09:58:24:767] Tuesday, October 03 2023 @09:58:24:76
    [09:58:24:767] Initializing J2534 Device
    [09:58:24:767] DLL already loaded, unloading before proceeding
    [09:58:24:767] Existing DLL successfully unloaded.
    [09:58:24:767] Loaded DLL
    [09:58:25:485] Connected to the device.
    [09:58:25:501] Battery Voltage is: 12.531
    [09:58:25:532] Protocol Set
    [09:58:25:548] Device initialization complete.
    [09:58:28:157] TX: 6C 10 F0 3C 01
    [09:58:30:252] ReadMsgs OBDError: ERR_BUFFER_EMPTY
    [09:58:30:255] VIN query failed: Timeout
    [09:58:30:309] J2534 setting VPW 4X
    [09:58:30:382] TX: 6C 10 F0 20
    [09:58:30:403] J2534 setting VPW 1X
    [09:58:30:448] TX: 6C 10 F0 20
    [09:59:03:956] Will save to C:\Users\ScottAnderson\Desktop\g.bin
    [09:59:06:164] Querying operating system of current PCM.
    [09:59:06:231] TX: 6C 10 F0 3C 0A
    [09:59:08:283] ReadMsgs OBDError: ERR_BUFFER_EMPTY
    [09:59:08:289] Sending 'test device present' notification.
    [09:59:08:289] TX: 8C FE F0 3F
    [09:59:10:327] ReadMsgs OBDError: ERR_BUFFER_EMPTY
    [09:59:10:328] Sending 'test device present' notification.
    [09:59:10:330] TX: 8C FE F0 3F
    [09:59:12:367] ReadMsgs OBDError: ERR_BUFFER_EMPTY
    [09:59:12:368] Sending 'test device present' notification.
    [09:59:12:368] TX: 8C FE F0 3F
    [09:59:14:406] ReadMsgs OBDError: ERR_BUFFER_EMPTY
    [09:59:14:407] Sending 'test device present' notification.
    [09:59:14:408] TX: 8C FE F0 3F
    [09:59:16:447] ReadMsgs OBDError: ERR_BUFFER_EMPTY
    [09:59:16:448] Receive timed out. Attempt #5, Timeout #5.
    [09:59:16:449] TX: 6C 10 F0 3C 0A
    [09:59:18:488] ReadMsgs OBDError: ERR_BUFFER_EMPTY
    [09:59:18:489] Sending 'test device present' notification.
    [09:59:18:489] TX: 8C FE F0 3F
    [09:59:20:529] ReadMsgs OBDError: ERR_BUFFER_EMPTY
    [09:59:20:529] Sending 'test device present' notification.
    [09:59:20:530] TX: 8C FE F0 3F
    [09:59:22:568] ReadMsgs OBDError: ERR_BUFFER_EMPTY
    [09:59:22:569] Sending 'test device present' notification.
    [09:59:22:570] TX: 8C FE F0 3F
    [09:59:24:608] ReadMsgs OBDError: ERR_BUFFER_EMPTY
    [09:59:24:610] Sending 'test device present' notification.
    [09:59:24:610] TX: 8C FE F0 3F
    [09:59:26:641] ReadMsgs OBDError: ERR_BUFFER_EMPTY
    [09:59:26:641] Receive timed out. Attempt #5, Timeout #5.
    [09:59:26:641] Operating system query failed, will retry: Error
    [09:59:26:688] J2534 setting VPW 4X
    [09:59:26:751] TX: 6C 10 F0 20
    [09:59:26:782] J2534 setting VPW 1X
    [09:59:26:829] TX: 6C 10 F0 20
    [09:59:26:891] TX: 6C 10 F0 3C 0A
    [09:59:28:929] ReadMsgs OBDError: ERR_BUFFER_EMPTY
    [09:59:28:944] Sending 'test device present' notification.
    [09:59:28:960] TX: 8C FE F0 3F
    [09:59:31:029] ReadMsgs OBDError: ERR_BUFFER_EMPTY
    [09:59:31:029] Sending 'test device present' notification.
    [09:59:31:044] TX: 8C FE F0 3F
    [09:59:33:094] ReadMsgs OBDError: ERR_BUFFER_EMPTY
    [09:59:33:110] Sending 'test device present' notification.
    [09:59:33:125] TX: 8C FE F0 3F
    [09:59:35:195] ReadMsgs OBDError: ERR_BUFFER_EMPTY
    [09:59:35:196] Sending 'test device present' notification.
    [09:59:35:212] TX: 8C FE F0 3F
    [09:59:37:259] ReadMsgs OBDError: ERR_BUFFER_EMPTY
    [09:59:37:275] Receive timed out. Attempt #5, Timeout #5.
    [09:59:37:290] TX: 6C 10 F0 3C 0A
    [09:59:39:358] ReadMsgs OBDError: ERR_BUFFER_EMPTY
    [09:59:39:369] Sending 'test device present' notification.
    [09:59:39:369] TX: 8C FE F0 3F
    [09:59:41:420] ReadMsgs OBDError: ERR_BUFFER_EMPTY
    [09:59:41:435] Sending 'test device present' notification.
    [09:59:41:435] TX: 8C FE F0 3F
    [09:59:43:495] ReadMsgs OBDError: ERR_BUFFER_EMPTY
    [09:59:43:499] Sending 'test device present' notification.
    [09:59:43:499] TX: 8C FE F0 3F
    [09:59:45:558] ReadMsgs OBDError: ERR_BUFFER_EMPTY
    [09:59:45:573] Sending 'test device present' notification.
    [09:59:45:573] TX: 8C FE F0 3F
    [09:59:47:620] ReadMsgs OBDError: ERR_BUFFER_EMPTY
    [09:59:47:636] Receive timed out. Attempt #5, Timeout #5.
    [09:59:47:636] Operating system query failed: Error
    [09:59:47:652] Unable to get operating system ID. Will assume this can be unlocked with the default seed/key algorithm.
    [09:59:47:652] Sending 'test device present' notification.
    [09:59:47:667] TX: 8C FE F0 3F
    [09:59:54:066] Sending 'test device present' notification.
    [09:59:54:081] TX: 8C FE F0 3F
    [09:59:54:128] Using OsID: 0
    [09:59:54:128] Suppressing VPW chatter.
    [09:59:54:144] TX: 6C FE F0 28 00
    [09:59:54:175] Sending 'test device present' notification.
    [09:59:54:191] TX: 8C FE F0 3F
    [09:59:56:261] ReadMsgs OBDError: ERR_BUFFER_EMPTY
    [09:59:56:429] Sending seed request.
    [09:59:56:444] TX: 6C 10 F0 27 01
    [09:59:58:514] ReadMsgs OBDError: ERR_BUFFER_EMPTY
    [09:59:58:516] No response to seed request.
    [09:59:58:516] Unlock was not successful.
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  11. 10-03-2023 #11
    kur4o
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    Communication looks good. At least it gets VIN query.
    When connected with Universal patcher, you can go to vpw console tab, check screen checkbox and uncheck buffered checkbox. It will log idle traffic and you can run some communication tests,

    Than send [use enter for sending]

    6c fe f0 20

    and in a while

    6c fe f0 28 01



    I suspect there is some timing issues with obxpro device.
    Go to settings tab ->timeouts and play with this setting.

    TimeoutJ2534Write from 0 to 100 in 10 increment.
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  12. 10-03-2023 #12
    Professwrx
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    Quote Originally Posted by kur4o View Post
    Communication looks good. At least it gets VIN query.
    When connected with Universal patcher, you can go to vpw console tab, check screen checkbox and uncheck buffered checkbox. It will log idle traffic and you can run some communication tests,

    Than send [use enter for sending]

    6c fe f0 20

    and in a while

    6c fe f0 28 01



    I suspect there is some timing issues with obxpro device.
    Go to settings tab ->timeouts and play with this setting.

    TimeoutJ2534Write from 0 to 100 in 10 increment.


    6C FE F0 20 looks like it resets the dash and probably restarts the PCM?
    [13:28:22.516] 6C FE F0 20
    [13:28:22.534] 6C F0 10 60
    [13:28:22.575] 6C F0 40 60
    [13:28:22.613] 6C F0 58 60
    [13:28:22.646] 6C F0 28 60
    [13:28:22.684] 6C F0 60 60
    [13:28:22.719] 6C F0 61 60
    [13:28:22.756] 6C F0 80 60
    [13:28:22.792] 6C F0 89 60
    [13:28:22.817] 6C F0 99 60
    [13:28:22.846] 28 FF 40 06 07 0B 0B
    [13:28:22.873] C8 7B 60 01 00 CA FB 19
    [13:28:22.910] 28 FF 40 06 07 0B 0B
    [13:28:22.949] A8 33 60 05
    [13:28:22.984] 28 93 40 01 FF FF



    6C FE F0 28 01 seems to do nothing

    [13:27:22.125] 6C FE F0 28 01
    [13:27:22.158] 6C F0 99 7F 28 01 12
    [13:27:22.181] 6C F0 40 7F 28 01 12
    [13:27:22.201] 6C F0 10 7F 28 01 12
    [13:27:22.220] 6C F0 58 7F 28 01 12
    [13:27:22.243] 6C F0 28 7F 28 01 12
    [13:27:22.264] 6C F0 60 7F 28 01 12
    [13:27:22.284] 6C F0 80 7F 28 01 12
    [13:27:22.302] 6C F0 61 7F 28 01 12
    [13:27:22.322] 6C F0 89 7F 28 01 12
    [
    Last edited by Professwrx; 10-03-2023 at 11:29 PM.
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  13. 10-04-2023 #13
    kur4o
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    Try
    6C FE F0 28 00

    Look for 5 seconds silence after command being send.

    After you connect you can go to vpw console tab->upload script->select attached file
    Attached Files Attached Files
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  14. 10-04-2023 #14
    Professwrx
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    Quote Originally Posted by kur4o View Post
    Try
    6C FE F0 28 00

    Look for 5 seconds silence after command being send.

    After you connect you can go to vpw console tab->upload script->select attached file
    saw 5 seconds silence

    looks like its dumping code in blocks with the script

    I saved that as bin file. Is that my entire PCM content? That's incredible man.
    it's only 192kb. Tiny tuner can't open it.
    Last edited by Professwrx; 10-04-2023 at 06:27 PM.
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  15. 10-04-2023 #15
    kur4o
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    Can you save the full dump for diagnosis. Looks like some blocks are missing and at some point it lost communication. Some timing adjustments may be needed. Size should be 512kb,
    On another note tinytuner database is fully integrated in universal patcher tuner section, so you can tune from there.
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