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  1. Yes the text on the download page could be...

    Yes the text on the download page could be clearer, but the process is described in the manual. The link is a self-extracting executable that unpacks the software. As it says: 1) run j2534install.exe...
  2. Drivers are posted right on the website:...

    Drivers are posted right on the website: http://www.drewtech.com/downloads/

    Direct link: http://www.drewtech.com/downloads/cd2534/CarDAQ-2534_DEC2004_V166_Installer.exe
    Manual:...
  3. Yes, it works fine. If in doubt email or call...

    Yes, it works fine. If in doubt email or call their technical support. That's what it's there for. :)

    If you're getting errors you may have some problem with your driver installation. The tech...
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    Looks fine. Pretty close: ID: 18DAF1xxh...

    Looks fine.


    Pretty close:
    ID: 18DAF1xxh Data: 04h 41h 0Ch 70h 0Ch Aah Aah Aah
    Note the PID is echoed as 0C, followed by the value 700Ch. Your example indicates 7,171 RPMs.


    You should...
  5. The vehicle uses an ISO15765 transport layer on...

    The vehicle uses an ISO15765 transport layer on top of CAN to move up to (approx.) 4k logical messages using individual 8 byte frames. This seems like an appropriate question for tech support of...
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    In each publication, a black bar in the margin...

    In each publication, a black bar in the margin indicates areas that contain technical changes (as opposed to english/editorial changes). As far as I know, there's no other sort of revision history....
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    No idea, I don't make that product, so you'd have...

    No idea, I don't make that product, so you'd have to call their tech support.


    Browsing the DrewTech website and clicking on support/downloads is a good place to start. Or call tech support. Or...
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    The original equation works for gasoline motors:...

    The original equation works for gasoline motors: current airflow / peak airflow, at this rpm, adjusted for barometric pressure, expressed as 0-100%. The latest publication adds that second equation...
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    Easier than a Y-cable, just enable the Mongoose...

    Easier than a Y-cable, just enable the Mongoose debug log (instructions are in the manual). That creates a text file with lines recording every J2534 API call.
  10. The PCM may set a pending trouble code the very...

    The PCM may set a pending trouble code the very first time a problem is detected. It might not set a confirmed trouble code (and light the MIL) until the same problem is observed repeatedly so the...
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    It's not a handheld scantool, it's Volvo's...

    It's not a handheld scantool, it's Volvo's official PC software. You cannot use OBDLINK but you can use a J2534 tool.
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    You should. Something's goofy here. Consult...

    You should. Something's goofy here.


    Consult SAE J1979 -- that doesn't look like a valid request. In my copy (Apr 2002) this would be Section 6.2.2.1 "Request Powertrain Freeze Frame Data Request...
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    Nothing special... just visit...

    Nothing special... just visit http://www.drewtech.com/downloads/ and download the "J2534-1 Tool". The installer gives you a *.exe and puts the full source code along with it under c:\Program Files....
  14. SAE J2534-1 describes two parts: the hardware to...

    SAE J2534-1 describes two parts: the hardware to connect to the vehicle, and the drivers that get loaded onto the PC. It can use any connection to the PC like USB, ethernet, serial port, WiFi, or...
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    That depends entirely on the tool, so if you're...

    That depends entirely on the tool, so if you're using an elm chip you need to know how it is implemented. J1979 tells you to issue requests like this:

    Wait for a certain amount of time (P2, 100ms...
  16. PLX Devices (http://www.plxdevices.com/imfd.html)...

    PLX Devices makes a series of sensor modules that can be hooked to the PC. Zeitronix makes an excellent wideband O2 controller that can also send pressure and temperature sensors to the PC. Outside...
  17. There are existing solutions for this like the...

    There are existing solutions for this like the Innovate Modular Tuning System. This system has distributed sender modules around the car (forming a daisy-chain network) and interfaces with the PC....
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    Too bad, the HS-3000 pack would've been the best...

    Too bad, the HS-3000 pack would've been the best deal up-front. For under $300 that includes all passenger vehicle standards.


    I'm 99% sure you don't have to be a member to attend a meeting. And...
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    PM sent.

    PM sent.
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    Class2 is GM diagnostics on a J1850VPW network....

    Class2 is GM diagnostics on a J1850VPW network. Anything's possible. Maybe it has a split architecture where some modules are on VPW some on KWP. Maybe they have an X-to-VPW gateway for compatibility...
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    SAE HS-3000...

    SAE HS-3000 is the collection of standards for passenger vehicles. It contains good background knowledge but the details come straight from the automaker, and GM charges something like $50k for a...
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    There's some structure to the madness. I can try...

    There's some structure to the madness. I can try to break it down, it's actually kind of similar:

    VPW:
    Header: 6C = Type of request, 10 = destination (ecm), F1 = source (obd2 tool)
    Request: 22 =...
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    I think you're looking at the problem at the...

    I think you're looking at the problem at the wrong layer. When you talk about CAN or VPW or KWP you're basically talking about the network wire (sort of like ethernet). Just because a vehicle uses X...
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    The details of highspeed are not in the spec...

    The details of highspeed are not in the spec which is a big problem. If you're an SAE member join in for the next J1850 committee meetings. It's in hot discussion.


    I think you're looking at the...
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    Most common diagnostics are on $21 and $22, less...

    Most common diagnostics are on $21 and $22, less commonly others. Decent approach if one of the obd2 addresses reports that data, otherwise more difficult.
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