I am trying to get more info on the data stream for a 95 Olds Cutlas Ciera (3.1L v6 with "M" for vin, ECM is 16213184) OBD connector has only 3 pins - A,K,M. I am able to monitor some data on M, but can't find more info on what all I am seeing.

I am getting "Chk Eng Light" coming on every now and then (random times), radiator fan also comes on. Engine seems to be running fine, and engine levels are good. I am guessing that I have a bad sensor, but dont' know how to find it. (cant read codes by shorting B pin since there is no pin) - would like to look at sensor values to see if they are out of range.

Data comes out the serial link, but not sure how to interpret it all - - I found some info, and config file for an "M" engine, but it seems to have some different data order, so I don't know if I can believe it... I have updated values for T6 and heartbeat values shown below - but still get lots of errors in comm with this.

any help would be appreciated - - thanks

example data
51:46.772: Scanning for heartbeat and chatter frames...
51:46.772: Waiting for Aldl bus silence of at least 13ms...
51:47.399: Heartbeat frame:
51:47.399: 51:47.112: $F0,$56,$F4,$C6
51:47.399: Heartbeat frame is followed by 27ms of silence
51:47.399: Advisable value for T6 is 13ms

(50:31.456)$F0,$56,$F4,$C6
(50:31.482)$0A,$58,$42,$00,$00,$5C
(50:31.485)$91,$59,$00,$00,$00,$20,$F6
(50:31.532)$0A,$58,$42,$00,$00,$5C
(50:31.535)$91,$59,$00,$00,$00,$20,$F6
(50:31.556)$05,$5F,$42,$00,$00,$37,$78,$00,$00,$00 ,$00,$78,$33
(50:31.582)$0A,$58,$42,$00,$00,$5C
(50:31.585)$91,$59,$00,$00,$00,$20,$F6
(50:31.632)$0A,$58,$42,$00,$00,$5C
(50:31.635)$91,$59,$00,$00,$00,$20,$F6
(50:31.656)$F0,$56,$F4,$C6