Re: Help: 97 Dodge Intrepid PCM scan problem --> GLEN



the data link connector for a short to ground if the resistance is below 5 ohms repair that wire for a short to ground. if it is not shorted to ground test the SCI recieve wire at the data link connector for a short to ground. If that wire is not shorted to ground check the SCI transmit and recieve wire from the PCM to the data link connector for resistance. assuming that those wires are not broken or shorted to ground the PCM is no good sci recieve data link pin 6 sci transmit data link pin 7
sci recieve PCM connector pin 75 LG sci transmit PCM connector pin 65 PK
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Yes, there is definitely resistance (10-14 ohms) from pin 7 and ground while both PCM connectors amd the TCM connectors are unplugged.
PCM pin 65 is bridged to TCM pin 7 supposedly at S154 (engine harness in headlamp breakout). This connection is suspect.
Do you know where S154 is actually located? I would like to check that before cutting and splicing in new wiring from PCM pin 65, TCM pin 7, and pin 7 at the OBDII connector.
What do you think?
Really, thanks for all the help to date.
Bill

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That splice is between the PCM and TCM pin 65 out of the pcm and pin 7 from the TCM at the Pk wire at the left front fender area
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Glen,
I could not find the splice and didn't want to unravel the harness (ugh). I cut and spliced in new 18g wires at the connectors to the TCM , and PCM and then ran a new wire through the firewall (via the hood cable grommet) to the ODBII connector. Bingo, it now works! Scans every time.
Thanks for all you help.
Bill

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