['96 850 GLT Wagon w/ECC] Feet still feel no heat

[jreed]

This is great feedback... Thanks. I double checked my transcription from the Haynes manual and found that I made an error on the "9 9 9 9".... it is indeed "9 9 9" in the manual -- I just typed it in wrong. Thanks for catching this.

[s2zeller]

Well, the reading and reset routine also worked for ECC codes on my 96 850 GLT. Using the LED on pin 7, I recorded 7 different ECC codes before it repeated the first code. Then I cleared the codes and it only read 1-1-1.

To clear the codes, I just left the key alone, on in position II. In other words, I read the codes, then when the first code repeated the next thing I did was hold the switch for 5 seconds, release and the LED lit up. Then close for 5 seconds, release, turn off key. Turned on key, codes were gone.

I then did the self-adjust on the damper motors, hopefully this will eliminate codes we will see.

Pin 7?

I'd been using Pin 6 (per ECC climate control temp sensor measurements made easier).

Or is Pin 6 for the '97's?

[erikv11]

Oops! My mistake, thank you!!

It is indeed pin 6, I am using the same instructions, I will edit my other post to help avoid confusion.

[s2zeller]

Well, for whatever reason, my reader was pulling codes without fail today.

I also figured out that I was not able to get into delete mode until after pulling all of the codes (i.e. closing the switch for 6-7 seconds didn't seem to do anything until I'd circled all the way back around to the first code AND didn't turn the ignition off before attempting to delete codes ... seems like some volatile bit must be getting set).

On the other hand, the LED doesn't stay permanently lit, so I'm thinking that this was the long pause I had encountered on my first code read attempt (which happened before I finished reading the full sequence).

In any event, I did manage to delete the codes and generated a new one (rather, regenerated):

231 - Ventilation Damper Motor Position Sensor Circuit Open Or Shorted To Power

We'll be driving the car around a bit to see if anything else shows up before I end this year digging into the dash of the car.

We did notice last night that it took a very long time to defrost the windows. I'm thinking it was an air flow (warming) problem rather than a dehumidification (i.e. AC) problem since it was the windshield's exterior that was not clearing off.

[erikv11]

...
I also figured out that I was not able to get into delete mode until after pulling all of the codes (i.e. closing the switch for 6-7 seconds didn't seem to do anything until I'd circled all the way back around to the first code AND didn't turn the ignition off before attempting to delete codes ... seems like some volatile bit must be getting set).
...

Yeah, this is the routine in the instructions and what I posted above; we can expect it to work this way on every car.

Glad you got it working!

[s2zeller]

After a drive-around yesterday, I re-read the codes and have a sum total of:

231 - Ventilation Damper Motor Position Sensor Circuit Open Or Shorted To Power
417 - Pass. Side Temp. Sensor Intake Fan Seized

I just lubricated the fan about a month ago, so I'll have to see what is up with that (as well as crawling under the dash).

[s2zeller]

Passenger side temp sensor fan is spinning freely, tho' I did give it another shot of cleaner/lube.

I'll try the system self-adjust to see what can get resolved.

[s2zeller]

I (in response to the 2 3 1 cited above) pulled the driver-side ventilator damper and tested that it responded to a 9V battery, then (along with generous cursing) reinstalled it.

I then tried the self-adjust and am (not surprisingly) a little confused about the following:

10) Verify the self adjustment procedure by pressing the diagnostic button 1 time for 1 second. If you get "1 1 1" flashed back, the procedure is complete.
11) If you get 5 1 1, it was not completed and should be repeated
12) If you get any other code, there is still a fault in the system that must be corrected.

Am I correct in that this is actually a set of either/or statements? That is, IF I have a code (3 2 3, for example), I would NOT get either 1 1 1 or 5 1 1 before it.

Would the 323 code be expected if I didn't get the ventilator damper motor in correctly, or should the self-adjust have taken care of that?

[s2zeller]

From my name is XXXXX XXXXX i have a 1993 volvo 850 with heater ... Read more: my name is XXXXX XXXXX i have a 1993 volvo 850 with heater ... - JustAnswer http://www.justanswer.com/car/10w3q-name-xxxxx-xxxxx-1993-volvo-850-heater.html#ixzz2GjwMcrwE:

If diagnostic trouble codes other than 5-1-1 are displayed:

If diagnostic trouble code 3-2-1, 3-2-2, 3-2-3, 3-2-4, or 3-2-5 are displayed WITHOUT 5-1-1;
Erase diagnostic trouble codes. See: Deleting DTCS
Ignition on.
Blower switch in manual position, half power.
Press the REC switch on the opposite side.
Turn airflow selector to defroster and wait 20 seconds .
Turn airflow selector to floor and wait 20 seconds .
Turn airflow selector to ventilation and wait 20 seconds .
Turn both temperature controls to maximum heat and wait 20 seconds .
Turn both temperature controls to maximum cooling and wait 20 seconds .
Activate DTM (Diagnostic Test Mode).
Read off the diagnostic trouble code (DTC).
No fault stored. Self-adjustment complete.
If a DTC (diagnostic trouble code) is stored, remedy DTCs. See: Fault Tracing Diagnostic System\Fault Tracing Procedures

So, it looks like I have some additional steps.

[erikv11]

I (in response to the 2 3 1 cited above) pulled the driver-side ventilator damper and tested that it responded to a 9V battery, then (along with generous cursing) reinstalled it.

I then tried the self-adjust and am (not surprisingly) a little confused about the following:

10) Verify the self adjustment procedure by pressing the diagnostic button 1 time for 1 second. If you get "1 1 1" flashed back, the procedure is complete.
11) If you get 5 1 1, it was not completed and should be repeated
12) If you get any other code, there is still a fault in the system that must be corrected.

Am I correct in that this is actually a set of either/or statements? That is, IF I have a code (3 2 3, for example), I would NOT get either 1 1 1 or 5 1 1 before it.

Would the 323 code be expected if I didn't get the ventilator damper motor in correctly, or should the self-adjust have taken care of that?

Just for moral support: I interpret it the same way, if you get a 323 then you presumably won't get either 111 or 511. Clear the 323 until it shows 111, then try again. If 323 pops up again then you should have to fix the cause of 323 before you can go through the self adjust. Or as you found below ...

From my name is XXXXX XXXXX i have a 1993 volvo 850 with heater ... Read more: my name is XXXXX XXXXX i have a 1993 volvo 850 with heater ... - JustAnswer http://www.justanswer.com/car/10w3q-name-xxxxx-xxxxx-1993-volvo-850-heater.html#ixzz2GjwMcrwE:

If diagnostic trouble codes other than 5-1-1 are displayed:

If diagnostic trouble code 3-2-1, 3-2-2, 3-2-3, 3-2-4, or 3-2-5 are displayed WITHOUT 5-1-1;
Erase diagnostic trouble codes. See: Deleting DTCS
Ignition on.
Blower switch in manual position, half power.
Press the REC switch on the opposite side.
Turn airflow selector to defroster and wait 20 seconds .
Turn airflow selector to floor and wait 20 seconds .
Turn airflow selector to ventilation and wait 20 seconds .
Turn both temperature controls to maximum heat and wait 20 seconds .
Turn both temperature controls to maximum cooling and wait 20 seconds .
Activate DTM (Diagnostic Test Mode).
Read off the diagnostic trouble code (DTC).
No fault stored. Self-adjustment complete.
If a DTC (diagnostic trouble code) is stored, remedy DTCs. See: Fault Tracing Diagnostic System\Fault Tracing Procedures

So, it looks like I have some additional steps.

Good find!