7813 - Coolant Pump for Intercooler AMS Alpha Plug-in Jumper Harness

[twdS5]

Has anyone else noticed a fault found in the ecu after installing an AMS Alpha Cooling Plug-in Jumper Harness? I searched Audizine 1st but had no luck.

7813 - Coolant Pump for Intercooler
P190A 00 [045] - Electrical Malfunction

I've had the AMS upgraded cooling system installed and 7813 fault for sometime now. Recently I needed some worked performed on the car at Audi and asked them to look into this fault. Audi ordered and installed the replacement secondary coolant pump, cleared ecu and like myself watched the fault immediately return upon re-scan. If the AMS Plug-in Jumper Harness is unplugged from the system, fault cleared the fault doesn't return. Once the AMS pigtail is plugged back into the system the fault returns.

Anyone else notice this? The Alpha Coolant system works fine and nothing is failing with it but I want this fault cleared. Any ideas? Bad pigtail or pulling too much current...

[613B6]

I think someone posted about this before, its always going to be there.

[Loe]

This is normal and nothing to be concerned about. My AWE Coldfront w/ upgraded pump has this same "ghost" code, others have this same code as well.

[colby7]

I have the AMS Alpha system, and I've never received this error code.

[sirsycott]

I have the AMS Alpha system, and I've never received this error code.

same my car has no codes with the system plugged in

[twdS5]

With some members report with and without the code is there any ideas on how to troubleshoot this any further to resolving the issue?

[sirsycott]

With some members report with and without the code is there any ideas on how to troubleshoot this any further to resolving the issue?

try getting a new pigtail harness from ams, or swap the end connections ? to see if its the wrong way around?

[RWD2quattro]

same my car has no codes with the system plugged in
^^ what he said^^

[nomis88]

It's a soft code. You'll need a vcds to read it, just had my "error" code verified by my shop today

[twdS5]

Little back story and the biggest reason I'd like to see this code resolved.

About 6 months ago my ecu went bad. Okay so things happen and ecu's go bad. Audi TD1 the car, I paid a few grand for ecu replacement, TD1 was removed once the new ecu was installed. No big deal as we all know what we're getting into when we flash the ecu's and I'm not going to argue one way or another if the tune was the cause or not.

At the time the car only had this code and no other known issue before ecu failure. For warranty reasons when the ecu was replaced I have not flash stg II tune back to the ecu but I'm 500 miles from factory warranty running out and now it time to re-flash. However, before something wonky goes on or bad luck repeats itself I'd like all and any codes in the ecu cleared before the re-flash of stg II.


*** Something really funny. When the ecu went bad the car was in my right side garage bay. This 4th bay is a single 8' door bay. The car immobilized itself being stuck in park and turning on the parking brake. Tow truck couldn't get the car because the the parking brake being engage and wouldn't release. Audi sent over a tech to try and help me get it out of the garage. After an hour or so he gave up and left. Tow truck came back with wheel coasters but they wouldn't clear the 8' garage bay the car was in. They all told me to call my homeoweners insurance for a recovery claim??? Yeah thats not happening. Couple of days later I remembered reading some people change there rear pads by hitting the rear parking brake motors with 12 volts to get them to retract. Jacked up the car, removed the rear tires, detached parking brake connections and sent 12 volts to each parking brake to retract. I didn't plug them back in and just put the rear tires back on. Called the tow truck to come back and he took it away.***

Next weekend I'll mess around with the AMS pigtail and see what can be figured out. I have a DMM and Oscilloscope so I'll take some readings with it unplugged not running, unplugged running, plugged not running, plugged running, swapping connection sides if possible and repeat. Report back what I find. If anyone has further ideas let me know.

[sirsycott]

Little back story and the biggest reason I'd like to see this code resolved.

About 6 months ago my ecu went bad. Okay so things happen and ecu's go bad. Audi TD1 the car, I paid a few grand for ecu replacement, TD1 was removed once the new ecu was installed. No big deal as we all know what we're getting into when we flash the ecu's and I'm not going to argue one way or another if the tune was the cause or not.

At the time the car only had this code and no other known issue before ecu failure. For warranty reasons when the ecu was replaced I have not flash stg II tune back to the ecu but I'm 500 miles from factory warranty running out and now it time to re-flash. However, before something wonky goes on or bad luck repeats itself I'd like all and any codes in the ecu cleared before the re-flash of stg II.


*** Something really funny. When the ecu went bad the car was in my right side garage bay. This 4th bay is a single 8' door bay. The car immobilized itself being stuck in park and turning on the parking brake. Tow truck couldn't get the car because the the parking brake being engage and wouldn't release. Audi sent over a tech to try and help me get it out of the garage. After an hour or so he gave up and left. Tow truck came back with wheel coasters but they wouldn't clear the 8' garage bay the car was in. They all told me to call my homeoweners insurance for a recovery claim??? Yeah thats not happening. Couple of days later I remembered reading some people change there rear pads by hitting the rear parking brake motors with 12 volts to get them to retract. Jacked up the car, removed the rear tires, detached parking brake connections and sent 12 volts to each parking brake to retract. I didn't plug them back in and just put the rear tires back on. Called the tow truck to come back and he took it away.***

Next weekend I'll mess around with the AMS pigtail and see what can be figured out. I have a DMM and Oscilloscope so I'll take some readings with it unplugged not running, unplugged running, plugged not running, plugged running, swapping connection sides if possible and repeat. Report back what I find. If anyone has further ideas let me know.


so.... you electro shocked treated the car into releasing it's brakes?
haha maybe it's possible the surge went back via battery management and surged the ecu? and possibly other sensitive or non sheilded components including the pigtail?

sounds sketch to release the brakes that way tbh but i'm not an expert and didn't ever know that you could do that
hopefully you get it to work out for you though i wanna lean towards bad pigtail and hopefully it pans out

[twdS5]

so.... you electro shocked treated the car into releasing it's brakes?
haha maybe it's possible the surge went back via battery management and surged the ecu? and possibly other sensitive or non sheilded components including the pigtail?

sounds sketch to release the brakes that way tbh but i'm not an expert and didn't ever know that you could do that
hopefully you get it to work out for you though i wanna lean towards bad pigtail and hopefully it pans out

Either I wrote something in my post above incorrectly or it was read the wrong way.

Part of my background was building/repairing PLC's, VFD's and VSD's that controls 480V equipment all the way down 5-20ma sensors. I know my way around electrical systems when needed and how not to fry them.

No didn't electro shock the car. I had already contacted APR and we ran some diagnostics that pointed to the ecu being bad. A lot of modules were offline and would not come online. We all agreed I'd pull the ecu and bring it to my local tuner who then would try and bench flash and see if that would work. It didn't work and further confirmed the ecu was dead.

This was all done before I had called Audi to come get the car and before I unplugged the rear parking brakes and sent 12 volts to the parking brake motors to release. It was just the parking brake motors as the rest of the electrical system was isolated at this point. I did NOT send 12 volts through the plug back to the electrical system.

Next weekend I'll play around with the pigtail if I have time. Its wakesurfing/boarding season. I've been redoing the stereo in the boat the last few weekends and didn't realize how much time went into getting a BitOne DSP level matched, crossovers points sloped correctly and the whole thing eq'd nicely through Room EQ Wizard. Plus the subs are taking their sweet time to break-in which complicates eq'ing.