ECC can't mantain AUT temp control

ferrari9 · Post by **ferrari9** » 30 Sep 2006, 00:31

I almost forgot... I'm going to definately work on this fan problem ASAP because it is already getting very cold here in CT at night and I'll be screwed without heat come full on winter. I'll keep you posted on my progress throughout.

It seems that this is a very common problem and through my search of a DIY fix I'm really thinking that this could be a so called "blanket fix" for a common yet frustrating problem.

Also on the to do list is the Winter Mode for tranny... button won't do anything when I push it. I suspect the large amount of coffee spilled by previous heartless owner...

Anyway, I'll post on that in another section. Actually... which light am I supposed to see if the Winter Mode is activated? Since it has never worked I have no idea...

Post by **MadeInJapan** » 30 Sep 2006, 07:06

If not already, get familiar with this:
http://www.volvospeed.com/maintenance.shtml
Within that, this link will help with the light replacement: http://www.volvospeed.com/Repair/SV70console.php It is for S70, but most is the same, just how the console comes out is different for your 850. For that, consult this page: http://www.volvospeed.com/Repair/Microswitch.php
Good luck!

I mentioned the ABS self-repair because you seem to be very mechanically savy and thought you might tackle it on your own. I personally did not...I sent mine to Victor last year and it worked out great. Sent it to him on Monday and got it back on Friday. You can drive without the module but the Speedo won't work and of course the ABS won't work. You'll know what the RPM equivalence is for MPH on your car so you don't speed on your highway. Calibrate these BEFORE taking it out.

ferrari9 · Post by **ferrari9** » 01 Oct 2006, 12:00

I finally had some time this morning to take a look at and read thoroughly all the links you provided for me. Once again, very informative! I can't thank you enough for all your help! I hope I can return the favor some day

.

It loks like the ABS module will be a bit hard to repair. The thought is still very tempting to open it up and give it a shot for the sheer challenge it poses. Appearantly though, according to those who have tried, the hardest parts of the project will likely be getting the unit itself open without damaging anything and successfully diagnosing/thoroughly repairing what is really wrong. While I can probably overcum getting it open successfully enough, it is the diagnosis/accurate repair that makes me nervous. Maybe if I had a little more experience with it... If I can find any more info on the subject and/or decide to go ahead with it I'll share what I come up with. I may just break down and go straight to Victor

The VADIS page will definately do the trick with this ECC problem, or any other that arises appearantly!!! I'm going to record each step of my project and report back.
I'm gonna go look into the microswitch page a little more...

billandiris · Post by **billandiris** » 07 Oct 2006, 21:23

2000 Volvo V70 XC
65k

A lot of great information was presented here. And while I'm not a car repair guy, I like to have a lot of information at had so that I can work better with my mechanic and solve the problems with my Volvo quicker.

I recently had the blinking ECC lights (started yesterday). I found the hints offered here but was disheartend to see that I had no codes and that my indicators were different than those offered.

My Recirculate and AC Off light blink at a steady rate 20 times. I tried to do the reset sequence as outlined to no available. I downloaded the .pdf which detailed the process but again, my blinking lights were not described.

I'll be making an appointment for next week but would love to get a little insight from one of you car-smart guys before I bring it in.

Thanks
Bill

Post by **MadeInJapan** » 08 Oct 2006, 06:14

First of all without focusing in on the blinking lights, do you have any noticeable issues out of your climate control system? Evidently from '99 on the method mentioned above does not work. Anyway, typically you have one of 5 issues with the system which you can deal with yourself to some extent (only the dealer can read your climate control codes):
1. Problem: Lack of refregerant if you're trying to run AC
You'll notice lack of cooling ability.
2. Problem: seized AC/Heater Fan
You'll notice smell of electricals, that no fan is turning, or that fan is having trouble turning.
3. Problem: Dirty or non-working thermostat sensors in the cabin area (these can be cleaned with compressed air or in worst case, a q-tip and denatured alcohol- very gently).
You'll notice similar to #2- that the fan isn't coming on or that it comes on irregularly, or that some parts of the cabin heat/cool while others don't.
4. Problem: Climate control relay(s)- some have one, others have two- near the fan.
You'll notice the fan doesn't come on at all, or if you have 2 relays in your system that taking the dial off of automatic and putting it on manual seems to force the fan to come on and work but it doesn't work in auto.
5. Problem: Recirulating fan is damaged or not functioning properly (plastic armature is for instance desingaged from it...it is behind the glove box and the arm can easily be seen as having fallen off and can be reattached.
You'll notice a distinct random "clicking" sound from behind the glove box as if something's trying to move but it can't and different type of air coming out of different vents on the dash- possibly moving the dial for different air mixture from feet to head and even defrost not coming on.

Maybe there are other types of failures but these are ones I've either experienced or have read about others having. Hope the information helps.

billandiris · Post by **billandiris** » 18 Oct 2006, 13:12

2000 V70XC
65k miles

I did have a noisy fan for a few days a month prior to my ECC failure. But the fan noise was intermitent and went away. At the end of the day, here's what had to be fixed:

"Fault Code CCM-433: Current too high for fan motor. Replaced fan motor, resistor pack & power supply. Replaced Temperature Sensor as well."

Parts: 503.55
Labor: 450.00

Temperature Sensor: 96.29
Expansion Tank: 51.88
Fan Motor: 223.54
Resistor: 131.84

Oh joy.

Jerbob · Post by **Jerbob** » 06 Nov 2006, 16:02

Hi and thanks for your help with other members about this problem.
I removed the grab bars but found yellow plastic clips inside so I couldn't see the sensor/motors, except through the vent holes. Cleaned out the lint from both, but the lights are still flashing, even though the AC/htr system works fine now.
Just in case I have to remove the sensor/motor assembly, how do you get the internal plastic clips out for the grab bars?
Many thanks. Sorry if I'm missing the obvious about removing the clips.

Post by **MadeInJapan** » 06 Nov 2006, 20:54

Use a slotted screw driver and they'll hinge down...then there are screws under them that you can unscrew. Once this is done the grab handles just pull down. To get to the fan/temp sensor, you have to take the top of the pillar cover between the front door and back door off...just pry if off...then you'll see a red clasp in the middle near the top of the pillar. Twist this 90degrees and the wire retainers come loose. Take the plastic molding off btween the front too and the windshield (called the A-pillar). Once this is off the head liner can be pulled down, then the fan/temp sensor removal should be self explanatory. Good luck!

steve · Post by **steve** » 07 Nov 2006, 12:39

If you also remove the two bolts holding in the sunvisor you will be able to gain access to the fan/temp probe alot easier.

Replaced both of mine yesterday. Bought both of them used from Erie for $45 each.

You can also see whether the little fans are spinning with a strong flashlight by shining it and looking into the hole in the trim piece. The fan will turn for about 4-5 seconds when you turn the ignition to the 'run' position. the fan will run continuously when the engine has been started and the system is turned on.

This is a quick way to verify a code 414 or 417. (Fan seizure), without physically taking them out first.

Once the grab bar is snapped out of the yellow pieces the headliner should be able to be pulled down without removing them... providing the "b" pillar trim, door trim and visor is removed.

Hope this helps.

Jerbob · Post by **Jerbob** » 07 Nov 2006, 18:50

To MadeinJapan and Steve,

Thanks to both of you for your very thorough instructions on getting to the fans.
Now to blank out some time from art projects to try the code read/delete procedure to see if removing the lint plugs from both sensor orifices did the trick. If not, I will be looking into replacing the motors for the sensors.
Again, thank you both and hope you have a great Thanksgiving.
If you'd like to see what I've been working on (other than my recalcitrant Volvo 850 wagon), go to
http://www.jerryrmartin.com
Best regards. Glad Matthew put up this site for us Volvo owners!
Jerry[/b]