Dtc Retrieval For Ecc/mcc For 850/70 Series

[MadeInJapan]

To my surprise, I discovered that this is possible. Not sure what cars this extends to, but someone should try this out. Trouble is that none of the DTC's are explained. I'm suspecting that the codes you get are going to mean the same as what you pull out of the diagnostic junction boxes (B-1 codes all found in the '95 850 downloadable service manual)), but not sure about that.

Click on the link below. It will take you to FileFactory. In the middle of the page there's a link you'll click on to use FileFactory Basic for free. This will take you to a second page. Click on Free Download in the middle of that page.

http://www.filefactory.com/file/634a6b/

Now, when you open the pdf file, scroll down about 2/3 of the way, and the prodedure is there to read the codes from your climate unit without a scan tool!

[MadeInJapan]

Can't believe no one has seen this....bumping up for inspection.

[Ronny]

I looked at it but I don't trust the content. Are you sure this works? It doesn't make sense. What pdf file are you talking about?

[MadeInJapan]

I looked at it but I don't trust the content. Are you sure this works? It doesn't make sense. What pdf file are you talking about?

I trust the content since I uploaded a Vadis document I converted to pdf myself, and the original is from Volvo themselves.

[erikv11]

This (about page 5 -onward) looks great for pulling ECC codes. I'll try tonight, presumably get a 1-1-1 but that will convince me it works. I'm afraid to self-adjust the damper motors, they seem to be working fine now ...

Good find!

The pdf should be permanently hosted somewhere, or just copy-pasted into a post, and pinned.

[garbergtsi]

this is only for MCC cars....which are somewhat rare, and does not apply to ECC cars

nevermind, i see you posted that now, duhhhhh

[MadeInJapan]

This (about page 5 -onward) looks great for pulling ECC codes. I'll try tonight, presumably get a 1-1-1 but that will convince me it works. I'm afraid to self-adjust the damper motors, they seem to be working fine now ...

Good find!

The pdf should be permanently hosted somewhere, or just copy-pasted into a post, and pinned.

I'll see what I can do.

After reading through this serveral times, the manual method (without a Volvo Scan Tool) appears to be only for MCC and not ECC. Still, it may help someone here. Hope this works...will try to load her up now.

Diagnostic Function: MCC

Diagnostic trouble codes (DTCs)

Diagnostic functions

The control module has on-board diagnostics (OBD) which monitors input and output signals.

When the control module detects a fault it stores the

information in the form of a diagnostic trouble code

(DTC) and the orange REC button indicator LED

flashes once. Every time the ignition key is turned to

position I or II the orange LED will flash once.

If the fault disappears (becomes intermittent) the

diagnostic trouble code (DTC) is automatically erased

from the control module. In principle the diagnostic

trouble codes (DTCs) are erased in the operative cycle

after the control module has registered that the

diagnostic trouble code (DTC) has disappeared.

Depending on what the diagnostic trouble code (DTC)

was that was stored this can occur in different ways. If

the indicator LED does not flash there are no DTCs

stored and no read out is required.

diagnostic trouble codes (DTCs) 2–3–1, 2–3–2, 2–3–5

and 2–3–6 the control signal/function is detected

directly the ignition is switched on. This means that the

diagnostic trouble code (DTC) is erased the next time

the ignition is turned on in the operating cycle after the

cycle where the fault disappeared or was corrected.

For other diagnostic trouble codes (DTCs) the control

module detects the signal/function first when the

function is activated, as for example when a motor is

activated, or self-adjustment is carried out. This means

that diagnostic trouble code (DTC) is erased in the

operating cycle after that during which the function

was activated and registered as OK, in other words the

second operating cycle.

Only when the diagnostic trouble code (DTC) is erased

will the orange indicator LED stop flashing when the

ignition is switched on.

The Volvo on-board diagnostic (OBD) system

functions are activated by pressing the REC button on

the unit. Do not start pushing buttons until 0.5

seconds after the ignition has been turned on

(positions I or II) and then carry out the required

combination within the following 2.5 seconds.

Note! If a diagnostic trouble code (DTC) is stored,

the indicator LED will flash once. It is now possible

to continue pressing the button to obtain system

responses.

Reading and erasing diagnostic trouble codes (DTCs)

The following functions are available:

1 reading off diagnostic trouble codes (DTCs)

(initiated by pressing two pushes of the button)

2 self-adjustment of the damper motors (intitiated by

three pushes of the button)

3 erasing diagnostic trouble codes (DTCs) (initiated

by four pushes of the button).

Refer to the picture for information on how to initiate

the sequences and how to interpret the flashes from the

indicator LED.

Note! The REC button must be pressed from the

out position (off) to the in position (on) in order for

it to be counted as a valid entry.

Note!

To ensure the diagnostic functions are activated in the correct way always

follow this working method:

Ignition on.

wait approximately 3 seconds.

ignition off.

ignition on again

wait for 0.5 seconds. If a diagnostic trouble code

(DTC) is stored, the indicator LED will flash

once. It is now possible to continue pressing the

button to obtain system responses.

activate the required diagnostic function within

2.5 seconds.

To activate diagnostics:

the ignition must be on

battery voltage normal.

-

Stored diagnostic trouble codes (DTCs) can be erased

using this function.

The on-board diagnostic (OBD)

system can identify 10 different faults in the form of

diagnostic trouble codes (DTCs).

To reading off diagnostic trouble codes (DTCs), proceed as follows:

ignition ON, position I or II.

wait approximately 3 seconds.

ignition off

ignition on again

wait for 0.5 seconds. If a diagnostic trouble code

(DTC) is stored, the indicator LED will flash once.

It is now possible to continue pressing the button to

obtain system responses.

press the REC button in twice within the following

2.5 seconds

read off the flashes from the REC indicator LED.

The REC button indicator LED is on for 1 second and

off for 0.5 second. The timing between the numbers in

a DTC code sequence is 2 seconds. The time between

two codes is 5 seconds. If no diagnostic trouble codes

(DTCs) are set the code will be 1-1-1.

For erasing diagnostic trouble codes (DTCs), proceed as follows:

ignition ON, position I or II.

wait approximately 3 seconds.

ignition off

ignition on again

wait for 0.5 seconds. If a diagnostic trouble code

(DTC) is stored, the indicator LED will flash once.

It is now possible to continue pressing the button to

obtain system responses.

press in the REC button four times within the

following 2.5 seconds

-

Note! The diagnostic trouble codes (DTCs) can also

be erased by disconnecting the control module for

more than 2 minutes (supply voltage power

disconnected), because after 2 minutes the entire

control module memory will be erased!

Diagnostic trouble code (DTC) 5–1–2 can only be

erased by disconnecting the control module for

more than 2 minutes or by carrying out a successful

self-adjustment.

Hint: If the indicator LED still flashes once when the

ignition is turned on this means the erasure procedure

has not been successfully completed and the diagnostic

trouble code (DTC) has again been stored.

The exception is diagnostic trouble code (DTC) MCC 1–1–1 for certain

control modules

Note! On the MCC/STANDARD control modules

introduced at production start-up of the

S70/V70/C70 series must fault-tracing for MCC 3–

4–2 be carried out if the REC button orange

indicator LED flashes once at ignition on

(diagnostic trouble code (DTC) stored) but the

control module flashes out diagnostic trouble code

(DTC) 1–1–1.

This applies to control modules marked “S2”, “S3”

or “S4”. See illustration.

Self-adjustment of damper motors

The climate unit damper motors can be self-adjusted

with this service

The damper motors are self-adjusting

after any of them has been removed or replaced or

other work is carried out on the damper or linkage. To

ensure correct self-adjustment the damper motors must

have voltage at generator supply level, e.g. the engine

must be idling.

To activate self-adjustment, proceed as follows:

start engine

wait approximately 3 seconds

start engine without switching off the ignition before start engine without switching off the ignition before wait 0.5 seconds after releasing the key to position

II. If diagnostic trouble code (DTC) is stored the

indicator LED will flash once. Only start pressing

the buttons after the flashing

press in the REC button three times within the

following 2.5 seconds.

Note! The control module will automatically adjust

the damper motors when it is connected to the car's

30 supply on condition that the control module has

been disconnected for more than 2 minutes. Engine

idling during self-adjustment.

OKAY! It worked

Moderator, please pin this in helpful info section for folks with a '98 70 series with MCC Systems for Diagnosing and resetting codes on their climate control system without a code reader.

[Geevs]

I can't download the file, how do I do it? Or can you just send it to me.

[MadeInJapan]

The only information you need (if you have a MCC) from the pdf file is in my thread right above yours...I figured a way out to put it into regular text and just put it in the body of this thread. The rest of the pdf deals with reading the codes (for ECC) with a Volvo Scan Tool, so it won't be useful to us here.