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Can the Chrysler tech "Sprinkle" please answer this question or anybody that knows how the TCM functions
My dilema is that I've a 96 Intrepid 3.3 and I've some wiring schematic info but it's not a very good photo cophys and it's not complete either.
I've tested the TCM and there's 12volts coming into pin 56 but theres another pin 15 that seems to say it too is a 12 supply.
Can you tell me exactly where this supply to pin 15 comes from, plus it's local id number please and what that feed is for and it's exact function please?
What is happening is the transmission silenoid isn't getting it's power , plus theres no power output at pins16 and 17, thus leaving me to think either that pin 15 feed is the fault here or ?
It would be a great help for me in truly understanding this TCM circuit if someone could explain exactly how it's suppose to work and if you've any literature explaining this it be greatly appreciated.
By the way I do have spare ECM's and TCM's for it but don't want to change them until I've a full exact understanding of the problem and a full proper diagnose
1 Answer
- 1 decade agoFavorite Answer
First, logging on for 24 hrs on https://techauthority.gltghosting.com/webapp/wcs/s... would help you immensly. $20 for 24hrs is very reasonable, and it is FACTORY information. Anyway. Pin 56 is fed from Fuse B in the PDC. This fuse also feeds the contacts or Pin 9B of the Trans Control Relay, also in the PDC, it should also be "hot" at all times. Pin 9C of the relay goes to Ground G102, located on the frame rail below the battery. The TCM sends power on Pin 16 to Pin 9A of the relay thus closing the contacts (assuming the relay is working) and sendind Fuse B's voltage through the contacts and feeding Pins 16 and 17 of the TCM. 16 and 17 are not "outputs", but are inputs. There are also voltage inputs at Pin 11 that is hot in Start, Run, and Off. Pin 8 should be hot in Start. When you cycle the key to Run, the relay should engage right away and then shut off. Watch Pin 15 for a voltage spike to 12 volts with key up.