No communication with PCM
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Man I wish mine were that easy. I have power at the 16 OBD pin. I don't have any at 2. Another member said that pin 2 is an Aux PCM or something to that effect, that my truck likely doesn't have, but that's the only out of place thing I see. I have blue tooth connection with torque, which means it's getting power, and the green lights blink, but no PCM. My scan tool says I have codes (so there is some connection) but says can't communicate with PCM. UURGG!! Called a local shop, just to get a known good tool on it to test. They want $85 to diagnose. So frustating. Guess I'll start chasing wires. How do you get the blasted PCM out?
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Senior User
Joined: Oct 2015
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I was doing some research, trying to figure out where to start. Looks like I found some good pin outs on the PCM, so I should be able to just pull the connector and ring out to the DLC and check grounds and connections.
But, I did just realize..
Pin 13: Circuit 107 (P), PCM Input from PCM pin 13, through C202
only had 0.46 to 0.50 V dc. In retrospect, that seems like "ghost voltage" or under voltage, which screams bad connection, or partial short. On the PCM side that is labeled "Generic scan tool input" hmmm
Any of this cause anyone to have an epiphany?
But, I did just realize..
Pin 13: Circuit 107 (P), PCM Input from PCM pin 13, through C202
only had 0.46 to 0.50 V dc. In retrospect, that seems like "ghost voltage" or under voltage, which screams bad connection, or partial short. On the PCM side that is labeled "Generic scan tool input" hmmm
Any of this cause anyone to have an epiphany?
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