BTW, that's LT5 Mark... LT4 didn't come around until 1996 IIRC. LT5 is a beast of an engine for its day.
either way, both the L98 and LT5 corvettes got the same CCM, so what works with one should work with the other.
i did a quick check on that packet, it has the correct checksum at the end of the string, so i have to believe it's valid. so i opened up A111 and guess what i see?
Code:
MODE 0 (RETURN TO NORMAL MODE)
ALDL REQUEST:
- MESSAGE ID = $F1
- MESSAGE LENGTH = $56
- MODE = $00
- CHECKSUM
CCM RESPONSE:
CCM BROADCAST MESSAGE
- MESSAGE ID = $10
- MESSAGE LENGTH = $59
- STATUS WORD
BIT DESCRIPTION
0 ENGLISH/METRIC STATUS 0 = ENGLISH 1 = METRIC
1 ENGINE 0 = L98 1 = LT5
2 A/C CLUTCH STATUS 0 = OFF 1 = ON
3 SPARE
4 SPARE
5 SPARE
6 SPARE
7 SPARE
- COOLANT TEMPERATURE
DEG C = N*.75 - 40
- ENGINE RPM
RPM = N*25
- VEHICLE SPEED
MPH = N
- CHECKSUM
matching that up, 10 59 08 6A 00 00 25 comes out perfectly, checksum included.
the next portion is 40 55 6B(checksum included)... kind of odd, but i can't find any modules using a code of 40. considering the length, i get the feeling that it's an ALDL device poll.
then we end with 41 61 00 f5 00 6a 62 01 00 00 00 76 00 5f c7(C7 being checksum)
now i'm fairly certain that the 40 was a poll from either the ECM or CCM to one or the other and the 41 is its counterpart.
so, there's your communications decoded.
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