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Thread: Mode $06

  1. #11
    North of the land of Hey Huns
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    Thanks Scantech. I've found a little bit of GM information, but that's the largest chunk of information I've seen so far. I'll definently have to include that in my software for ford vehicles.
    "stop with the REINSTALLS, what do you think we got some lame-o installer!!!" - mitchjs
    RevFE
    My Shop

  2. #12
    North of the land of Hey Huns
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    Below is what I've figured out for CAN based vehicles. This will be different on non-CAN vehicles, but I don't currently have one of those in my pocket to test and play on

    Sending 0600 gets you a list of Trouble ID’s (TID) between 0ื00-0x1F supported, 0620 gives you 0ื20-0x3F and so on up to 06A0. Parsing this the same one as you parse 0100, and we get a bunch of messages we can send.

    Request: “0601″
    Response: “7E8 10 1C 46 01 81 0E 0A CB 7E8 21 06 54 0E D8 01 87 10 7E8 22 00 9D 00 00 01 2C 01 7E8 23 88 10 00 84 00 00 02 7E8 24 58 00 00 00 00 00 00 ”
    Request: “0602″
    Response: “7E8 10 25 46 02 01 0A 0E 68 7E8 21 00 00 FF FF 02 81 0E 7E8 22 03 59 00 DC 0B B8 02 7E8 23 85 B1 F8 AA C5 68 00 7E8 24 00 02 86 10 03 92 00 7E8 25 00 17 70 00 00 00 00 ”
    Request: “0605″
    Response: “7E8 10 1C 46 05 81 0E 0A E5 7E8 21 06 54 0E D8 05 87 10 7E8 22 00 6B 00 00 01 2C 05 7E8 23 88 10 00 5D 00 00 02 7E8 24 58 00 00 00 00 00 00 ”
    Request: “0606″
    Response: “7E8 10 25 46 06 01 0A 0E 68 7E8 21 00 00 FF FF 06 81 0E 7E8 22 03 46 00 DC 0B B8 06 7E8 23 85 B1 F9 40 C5 68 00 7E8 24 00 06 86 10 03 3A 00 7E8 25 00 17 70 00 00 00 00 ”

    Take the first message:

    “7E8 10 1C 46 01 81 0E 0A CB 7E8 21 06 54 0E D8 01 87 10 7E8 22 00 9D 00 00 01 2C 01 7E8 23 88 10 00 84 00 00 02 7E8 24 58 00 00 00 00 00 00 ”

    Split that on the header 7E8, and you get

    7E8 10 1C 46 01 81 0E 0A CB
    7E8 21 06 54 0E D8 01 87 10
    7E8 22 00 9D 00 00 01 2C 01
    7E8 23 88 10 00 84 00 00 02
    7E8 24 58 00 00 00 00 00 00

    Remove the header and counter bytes, reorganize the arrangement of the bytes

    0181 0E 0ACB 0654 0ED8
    0187 10 009D 0000 012C
    0188 10 0084 0000 0258
    00 00 00 00 00 00

    So we have three messages for OBDMID (OBD Monitor ID) 0ื01. TID 0ื81, TID 0ื87, and TID 0ื88. All three of these are manufacturer specific TID’s, so we don’t actually have any information on what they mean, but we can still parse out the values. The third byte signifies how to parse the messages 0x0E means the result is in Amps, and you multiply it by 0.001. The fourth and fifth bytes are the value (0ACB), 2763. Multiplied by the mulitplier, and it’s 2.763Amps. The sixth and Seventh bytes are a minmum value, which multipled by the multiplier works out to 1.62Amps, and the eighth and ninth are the maximum which is 3.8Amps. Our value is between the min and max, so the test passes.

    Easy right?
    0181: Min: 1.62Amps, Max: 3.8Amps, Value: 2.763Amps, Test: Passed

    Now, parse byte 0ื10 means something else. In this case, it means it’s a time value, no multiple, and in miliseconds.

    0187: Min 0ms, Max: 300ms, Value: 157ms, Test: Passed
    0188: Min 0ms, Max: 600ms, Value: 132ms, Test: Passed

    The parse bytes I've figured out so far:

    Byte: 0x0A
    Type: Voltage
    Units: mV
    Multiplier: 0.122
    Min: 0
    Max: 7995

    Byte: 0x0E
    Type: Amps
    Units: A
    Multiplier: 0.001
    Min: 0
    Max: 65.54

    Byte: 0x10
    Type: Time
    Units: ms
    Multiplier: 1.0
    Min: 0
    Max: 65535

    Byte: 0x16
    Type: Temp
    Units: C
    Multiplier: 0.1
    Offset: -40.
    Min: -40
    Max: 6513.50

    Byte: 0x1C
    Type: Angle
    Units: degrees
    Multiplier: 0.01
    Min: 0
    Max: 655.35

    Byte: 0x20
    Type: Ratio
    Units: N/A
    Multiplier: 0.0039062
    Min: 0
    Max: 255.99

    Byte: 0x24
    Type: Counts
    Units: Count
    Multiplier: 1.0
    Min: 0
    Max: 65535

    Byte: 0x30
    Type: Percentage
    Units: %
    Multiplier: 0.001526
    Min: 0
    Max: 100

    These two are interesting ones. They're signed, so programatically you have to treat it as a short (two byte sized number). If you do so, the computer will automatically sign it properly. Through me through a loop initially, but the scan software I was using broke out the min/max as both calculated, and absolute integer values which helped a lot. Also, Pa is for pascal. Apparently this vehicle returns SI units. Not sure if this is standardized, or just this vehicle.

    Byte: 0xA9
    Type: Pressure/Second
    Units: Pa/s
    Multiplier: 0.25
    Min: -8192
    Max: 8192


    Byte: 0xFE
    Type: Pressure
    Units: Pa
    Multiplier: 0.25
    Min: -8192
    Max: 8192

    I'm going to post this on wikipedia as soon as I figure out the best format for the data. I'm very annoyed that this information is not available elsewhere, what with the plethora of software tools that support this mode. Once again, money over the good of others I suppose. I can't completely blame them, if this was the only thing that set a particular software apart from free software (Which on a side note, IS the only thing that makes pay software seem any better in a few cases), I wouldn't either.
    "stop with the REINSTALLS, what do you think we got some lame-o installer!!!" - mitchjs
    RevFE
    My Shop

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