Originally Posted by
1project2many
Welcome to the forum.
The 165 can be a tough nut to crack. Uni-directional serial data is delivered at 160 baud on pin E after jumpering pins A to B using a 10K resistor. Plugging in a cable designed for a later vehicle will not work. Your post doesn't mention that you're aware of this so if you don't mind, we should start with basics.
Questions:
1) When the key is first turned to "run," does the check engine light illuminate, turn off for a second or two, then light and stay lit? (Test normal ECM operation)
2) Are you able to jumper the ALDL to get "blink codes" from the ecm? (Test ALDL pins A and B)
3) What type of cable are you using (serial, RS232, USB)? (Some cables are less likely to work)
4) Is your cable designed to get serial data from pin E of the ALDL? (most cables connect to pin M)
5) Are you connecting a 10K resistor across pins A and B of the ALDL when the cable is connected? (without the resistor, data will not flow from the ecm)
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