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Post Info TOPIC: Range Rover P38 ABS ECU communication


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Range Rover P38 ABS ECU communication


Hi,
I want to ask you for help with my piece of software that I wrote - I'm trying to communicate with ABS ECU in Range Rover P38 2000...I've written a program in C# that
writes hex commands to serial port (I'm using FTDI usb-serial converter) and I use RTS line toggling to perform 5 baud init. Below are logs from that communication - can someone
tell me what does the line ... mean? I try different init commands - but I do not understand the responses I get - I do not know what I should do now...
I use Motorola MC33290D to convert signals from serial to K-line logic. The whole idea is to use that software for everything - no microprocessors.

Line 00002 and 00050 is the response after the 5 baud init - I do not know why I see 0x0 and 0xff but the most interesting part is 0x60 0xa 0x78 0x0 and 0x20 0x0 0x78 0x0 - what do those mean?

Port: COM7 opened, Baud rate = 10400
00000: 0xff
00001: 0xfe
00002: 0x0 0xff 0x0 0x0 0xff 0x0 0x0 0xff 0x0 0x0 0xff 0x0 0x0 0xff
Data sent: C129F1815C
00003: 0x60 0xa 0x78 0x0
00004: 0xf8
Data sent: C129F1815C
00005: 0x60 0x8 0x78 0x0
00006: 0xf8
Data sent: C129F1815C
00007: 0x60 0x0 0x78 0x0
00008: 0xf8


00050: 0x0 0xff 0x0 0x0 0xff 0x0 0x0 0xff 0x0 0x0 0xff 0x0 0x0 0xff
Data sent: C129F1815C
00051: 0x60 0xa 0x70 0x0
00052: 0xf8
Data sent: C129F1815C
00053: 0x20 0x8 0x78 0x0 0xf8
Data sent: C129F1815C
00054: 0x60
00055: 0x8 0x70 0x0 0xf8
Data sent: C129F1815C
00056: 0x60 0x8 0x70 0x0
00057: 0xf8
Data sent: C129F1815C
00058: 0x20 0x0 0x78 0x0
00059: 0xf8
Data sent: C129F1815C
00060: 0x60
00061: 0x8 0x78 0x0 0xf8

Below is another request test and responses...

Port: COM7 opened, Baud rate = 10400
00000: 0xfe
00001: 0x0 0xff 0x0 0x0 0xff 0x0 0x0 0xff 0x0 0x0 0xff 0x0 0x0 0xff
Data sent: 8129F1811C
00002: 0x0 0x8 0xf8 0x0
00003: 0xf0
Data sent: 8129F1811C
00004: 0x0 0x8 0x78 0x0
00005: 0xf0
Data sent: 8129F1811C
00006: 0x0 0x8 0xf8 0x0
00007: 0xf0
Data sent: 8129F1811C
00008: 0x0 0x8 0x78 0x0
00009: 0xf0
Data sent: 8129F1811C
00010: 0x0 0x8 0x78 0x0
00011: 0xf8



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