hennpete

I am having problems with my heat/AC. Changing the air locations has no effect and it is getting tough to drive without defrost. I ran the AC diagnostic check and get the error code B1462 Wide Open Throttle (WOT) position signal (diesel engines). I have not been able to find out what this means or how to go about fixing the problem.

Anybody know what the problem may be?

-Pete

ohlord

while in error mode of the cc diagnostics.Then see if it comes back.
When you operate the cc can you vary the air flow and does the ac and heat operate?If they do properly and changing air direction is the problem,your issue is with the vacuum.I'm heading out the door right now.Maybe someone has the schematic or I will look for one later.

hennpete

I cleared the code (hit both auto buttons, d FF) appeared then turned off ignition and rechecked and the same 1462 came back. I am having the classic blower motor regulator problem (blower has a mind of its own). I plan on replacing the blower regulator with the DIY W124 regulator procedure but I don't think that will help my vent problem.

Warm Air only comes out on passenger feet (i propped driver side flap open to avoid frozen feet) and warm air comes out of the console vent. The end dash vents blow cold along with the center vents. Nothing is coming out at the windshield. The A/C always was cold just wouldn't blow for any extended period of time.

The car also has the check engine light on (dealer said it was some flap that controls emissions) so I decided to leave it as is. Also the SRS dash light came on a little while back and has stayed on.

I am hoping to start working through all these issues assuming they are not related. For now I just want to be able to get air to defrost my windshield.

ohlord

are you located?Do not leave a cel on for any period of time,it will cause problems in other systems that can lead to costly repairs.Harbor freight tools has a hand held scanner for 40 bucks #94169 and read your own codes.
Post them when you have them.
What were the other sensor values in the diagnostics?

hennpete

I bought the scanner 94169 from HF (now $60 on sale) and it seemed to run ok but said there were no codes. I select erase codes after that, it said it erased them. THe cel is still on (the dash says check engine electronics) and the SRS light stays constantly lit.
Here are the diagnostic values: 1 09, 2 06, 3 13, 4 13, 5 05, 6 27, 7 03, 8 11, 9 02, 10 1.1, 11 3.3, 12 4.3, 20 0.0, 21 06, 22 00, 23 00, 24 13.0, 40 60, 41 19, 42 00, 43- 112

error code on AC panel Eb 1462

TMAllison

Let the engine warm up to operating temp next time. (6 = 27c coolant temp).

Cant read or clear SRS codes with that scanner. Try SDS or other high end product.

Fix the emissions issue the dealer told you about. May have to do with the Resonance flaps and/or EGR valve which are vacuum actuated.

hennpete

It was a while back when he told me what the problem was. I remember it was something that regulated the the air flow to control the emissions. Said it would need to be taken apart and carbon cleaned out so flap could move to control airflow. I am wondering if it could have been the EGR pipe that he was talking about. I cannot find mention of where this pipe is located on the car. I could take it off and check to see if it is clogged if I knew where it was.

-Pete

TMAllison

See #8 & 77.

http://www.detali.ru/cat/oem_mb2.asp...SGR=030&SGN=02

ohlord

you purchase the scanner?If recently go to the hbf web site and print the ad for the 94169 scanner and take it to the store,they will meet the internet price.$20 bucks back will buy some beer and a burger,while you ponder the solution.
We have some very good diesel guys over on benzworld.org w210 section run that emissions code past them.The srs light is most likely the passenger seat occupancy sensor.Check the wires and diy R/R is in the diy section on benzworld.org w210 diy stickies at the top of the forum.When that light is on the passenger bag is not operational,not a good prospect in the event of an accident.

hennpete

Does it make sense that I have a check engine lite on and the scanner reported no codes? I took off a metal pipe from the exaust manifold to a vacuum actuated valve thinking this may be the pipe to the EGR valve (picture provided previously is for a Turbo I believe, mine is not a turbo). The pipe had fine carbon deposits but was clear, took the valve off and it wasn't stuck or anything.

I found the write-up from the dealer. It says that I need 2 Resonator flap valves inside the intake and a carbon cleaning ($800). I cannot seem to find them on the autohausaz website, should I replace them or just try to see if I can clean them?

I would like to check to see if the switch box for the vents is leaking and needs to be replaced. Where can I find it? Is it above the passengers feet under one of those black covers?

TMAllison

The detail I linked to IS your engine, a 606.912. The turbo is the 606.962 and is minus the crossover pipe.

The usual problem with your engine is the resonance flaps getting sticky; usually gets worse in colder weather as the sludge gets stiffer.

The part numbers are listed on the detail.

hennpete

Is there a decent chance I can remove them and clean them up to get them working again? If not, I am wondering if it is worth replacing them. If I don't, the CEL will stay on and I will not know if anything new crops up HMMM

TMAllison

They can normally be cleaned if simply sticking. There is an electronically controlled vacuum transducer that can also be bad.

hennpete

I want to make sure I am clearing codes properly. I used the OBD II scanner and it says there are no codes. I ran the delete code function and it said it ran. I don't want to take out the resonator valves if they are not causing the CEL. Is it possible that they are ok now and the CEL is from something else?

I do have an SRS light on and the CEL stays on as well. Will the CEL stay on for an SRS issue or because of the b1462 issue in the AC diagnostics. If not, I am not sure why I get no codes but the CEL is staying on.

I tried to clear the b1462 codes on the AC diagnostics but I am not sure I did it right. When the code was showing I hit both Auto buttons, it showed d FF, I assumed this meant delete finished. I turned off the key and turned on again (car not running either time) and ran the error check and got the b1462. Just want to make sure it was cleared and came back. Am I doing this right?

TMAllison

To delete codes on the CCu follow the instructions provided on the other forum you posted on.