What happens to the PCM when the battery is disconnected?
The PCM is looking for the the “start/run” circuit to pulse which would be expected when the ignition key is turned on/off. But because of the switch fault this isn’t happening. When the battery is disconnected this provides the reset signal that the PATS system is looking for.
What happens when you disconnect the battery in a car?
When the battery is disconnected this provides the reset signal that the PATS system is looking for. There are several “gangs” inside the ignition switch. A set of wiring diagrams would be needed to confirm which fuses should be “on in start/run”. It would then be possible to test the the fuse to see if the circuit is acting like it should.
What happens when you take the NEG battery cable off?
Taking the neg battery cable off is resetting SOMETHING that is causing the problem. PATS is going off. Taking the neg battery cable off is resetting SOMETHING that is causing the problem. Click to expand… Weak battery and poor connection at the terminals (dirty, corroded).
How long does it take to reset a Motronic?
So to reset the Motronic, at least 5 minutes–to be sure I’d leave the fuse out 10 minutes, then reinstall and relearn the TPS range. Motronic MA 2.4 Reset Time: Remove Fuse 5 for 10 minutes. This also means if you’re quick you can disconnect battery ground briefly without resetting the Motronic. DRONE and thirsty 1 like this.
What can you do with a car battery that has been disconnected?
With the battery cables disconnected, you can safely perform repairs on electrical components of the vehicle. If you just need to put in a new car battery, it can be done in a few simple steps. After the battery is disconnected, unscrew the brackets that hold it in its tray.
The PCM is looking for the the “start/run” circuit to pulse which would be expected when the ignition key is turned on/off. But because of the switch fault this isn’t happening. When the battery is disconnected this provides the reset signal that the PATS system is looking for.
What to do if Uconnect fails on Dodge Dart?
First, disconnect your negative battery terminal and leave it disconnected for anywhere between 10mins to overnight. This sometimes corrects issues. If this fails to correct the issue you MAY have a bad Telematics module. This module handles all of the bluetooth communication AND it interfaces with Uconnect. Mine failed.
Is there a factory reset to correct Uconnect?
That does not reset or correct anything. First, disconnect your negative battery terminal and leave it disconnected for anywhere between 10mins to overnight. This sometimes corrects issues. If this fails to correct the issue you MAY have a bad Telematics module. This module handles all of the bluetooth communication AND it interfaces with Uconnect.