Hello all,
Looking for some assistance and advice regarding a non-starting and brain dead 2004 V10 (I've already read every existing thread related to this issue from start to finish).
The symptoms began as intermittent non-starting: with key on only some of the dash would come to life (not all of the gauges would work), and turning the key to starting position would result in nothing happening. Sometimes the key would not be released from ignition and shifter could not be moved into neutral. Time and/or several tries later and eventually it would start.
Currently with the key on, only some of the dash comes to life: the screen comes up, but does not show all of the typical pre-start icons (like glow plugs), and non of the gauges come on. Turning the key to start does nothing. The shift lever is usable and the key can be removed.
There must have been a constant parasitic draw on the batteries because eventually they went dead. Both batteries are less than 1 year old (sized properly according to threads on here) and have been removed from the vehicle and load tested as good. They have been re-charged and re-installed.
I have attached a vagcom scan (done prior to steps taken below). This is my first time using one so I could use help interpreting it. The main issue appears to be that there is no communication with the ECM at all. I understand that many/most of the dtc's are probably related to the dead battery. But, due to the lack of communication with the ECM, I do not know how to clear all of them in order to run a new scan. Help?
What has been tried so far:
1) All fuses checked (drivers side, passenger side, and in engine bay).
2) Wiring harness under driver's floor board carpet checked. No visible sign of corrosion, but all splices were re-spliced.
3) Batteries load tested, re-charged, and re-installed.
4) Clean dirt and debris away from wiper area.
5) Removed and inspected ECM's- no visible sign of water or damage on plugs (did not open cases). Cleaned electrical plugs on both.
5) Checked starting requirements to start - found bad brake light switch and replaced.
6) Checked door handles- passenger door black button does not work. Plan on disconnecting wire harness to all door handles if necessary, but not done yet.
7) Kessy removed and repaired. The two MOSFETs were replaced (they appeared to be stuck open, but not burned up). The resistors all checked OK.
Re-installed the repaired Kessy, the new brake light switch, and the re-charged batteries. No change in status- still brain dead and vagcom says no communication with ECM.
Now the stock alarm system is acting up. While working on the car with the driver's door open and the key sitting on the seat the alarm has been arming itself and locking the doors. This is the first time it has ever done this.
Any input to help me get this beast running would be greatly appreciated!
-Jason
Looking for some assistance and advice regarding a non-starting and brain dead 2004 V10 (I've already read every existing thread related to this issue from start to finish).
The symptoms began as intermittent non-starting: with key on only some of the dash would come to life (not all of the gauges would work), and turning the key to starting position would result in nothing happening. Sometimes the key would not be released from ignition and shifter could not be moved into neutral. Time and/or several tries later and eventually it would start.
Currently with the key on, only some of the dash comes to life: the screen comes up, but does not show all of the typical pre-start icons (like glow plugs), and non of the gauges come on. Turning the key to start does nothing. The shift lever is usable and the key can be removed.
There must have been a constant parasitic draw on the batteries because eventually they went dead. Both batteries are less than 1 year old (sized properly according to threads on here) and have been removed from the vehicle and load tested as good. They have been re-charged and re-installed.
I have attached a vagcom scan (done prior to steps taken below). This is my first time using one so I could use help interpreting it. The main issue appears to be that there is no communication with the ECM at all. I understand that many/most of the dtc's are probably related to the dead battery. But, due to the lack of communication with the ECM, I do not know how to clear all of them in order to run a new scan. Help?
What has been tried so far:
1) All fuses checked (drivers side, passenger side, and in engine bay).
2) Wiring harness under driver's floor board carpet checked. No visible sign of corrosion, but all splices were re-spliced.
3) Batteries load tested, re-charged, and re-installed.
4) Clean dirt and debris away from wiper area.
5) Removed and inspected ECM's- no visible sign of water or damage on plugs (did not open cases). Cleaned electrical plugs on both.
5) Checked starting requirements to start - found bad brake light switch and replaced.
6) Checked door handles- passenger door black button does not work. Plan on disconnecting wire harness to all door handles if necessary, but not done yet.
7) Kessy removed and repaired. The two MOSFETs were replaced (they appeared to be stuck open, but not burned up). The resistors all checked OK.
Re-installed the repaired Kessy, the new brake light switch, and the re-charged batteries. No change in status- still brain dead and vagcom says no communication with ECM.
Now the stock alarm system is acting up. While working on the car with the driver's door open and the key sitting on the seat the alarm has been arming itself and locking the doors. This is the first time it has ever done this.
Any input to help me get this beast running would be greatly appreciated!
-Jason
