puzzled on "E-box-fan" & "Function check TEV"

primeral · 30th October 2011, 05:03

Hello all,

With the weather so nice, I decided to do something about an SES that's been bugging me for months. I was getting three codes consistently: E-box fan, Function check TEV, and Engine temp plausibility. After some searching, I read that one of us thought they had fixed the fan problem by cleaning the electrical contacts until they got the SES light again. I decided not to take the chance and bought a new fan from the local dealership.

Regarding the Function check TEV and Engine Temperature Plausibility error, this post outlines a Service Information bulletin that addresses those two codes. Problem is, my car is a MY2002 with build date of 12/01. My Base Control and Programmed Control Unit numbers are also higher than the 7 831 762 and 7 831 872 numbers mentioned in SI B 12 24 99, so it doesn't really pertain to my car. My search comes up with no real clues as to what needs to be fixed.

I went and bought a new E-box fan from the dealership and changed it out today. Thanks to this thread, I was able to do this fairly quickly. Here are the original codes I that would light up my SES ... it would be on for weeks and magically disappear only to return again after a few days:

143 E-box-fan

Error frequency : ___ (some high number)
Logistic counter: 40

Engine speed 720.00 rpm
relative filling 18.40 %
Cooling water temp. 61.00 degrees C
Supplier voltage HR 11.40 V
aufgetreten vor (rel. B2) 30.00 km

0100 - Broken wire / Value missing
Error not present
Sporadic error

Errorcode: blahblah (is this important?)

--------------------------------------------------------

232 Function check TEV

Error frequency : ___ (some high number)
Logistic counter: 40

Total air mass 20.00 kg/h

Environmental temperature CAN 15.00 degrees C
Tank air evacuation adaption 1
Tank air evacuation adaption 2
aufgetreten vor (rel. B2)

0100 - Broken wire / Value missing
OBD exhaust relevant error
Error present
Static error

-----------------------------------------------------------------

105 Plausibility Engine Temperature
blahblah

1000 - Condition / value implausible / over temperature

Well, I put her back together, cleared the errors with INPA, and took my wife out on a hot date. Upon reaching the driveway on our return home, the SES light came back on again. What's disappointing is the E-box-fan code is back. This really sucks because I just spent $120 on a stupid fan. I'm going to try cleaning the fan plug's contacts and inspecting the wire for damage. About the Function Check TEV, does anyone have any hints? I've been watching my engine temp gauge and it's been normal. I'd also like to add that I was getting this error in 100 degree F heat and even now that it's 60 degrees F.

One more thing, I have to thank you guys for another previous thread ... I touched my crank case vent hoses and they felt gross. The passenger side hose even has a few small holes in it. It's good to know I'm not alone with these problems

Any possibility it's related to the Function Check TEV code?

68FB · 30th October 2011, 06:01

The 105 coolant temp plausibility code (aka 69 code in hex on a Peake reader) is usually the thermostat or the temp sensor mounted in top of the t/s housing. I had this code and changed the t/s first, which is a tricky little job (see link) but I still got the code. Changing the sensor fixed it. This is a much easier job that the t/s so I suggest trying that first. Siphoning the coolant out of the expansion tank gets the level low enough to replace the sensor without spilling coolant.

Did a thermostat replacement today (a lot of pics)

Sailor24 · 30th October 2011, 18:50

232 is the evap valve under the plenum. Very common for them to fail. The odd time the valve is not at fault sometimes the Charcoal canister is plugged, usually when the owner has to top up when filling up. So if you don't squeeze every drop of fuel you can when filling up it is likely the valve. You want to have the valve on hand when you go in to check it because it is under the plenum. If your valve functions, send the new back unopened.

The other 2 codes together are interesting. Don't use the gauge for diagnostics use OBC test 7 Ktemp. I would also be interested in seeing your Atmp which is the same test number you push the left button twice more. Watch those and post back what you see. I am sure you know what tests I speak of but a newbie searching may not so read this both pages
Gadget Freaks II: Fun you never knew you could have [secret menu]
Ya I know newbies never search, I can dream.

Have you seen your ebox fan spinning? have you checked for power at the fan and have you checked the fuse?