VOLVO V70 Climatronics Error: CCM-0070, Potential Causes & Solutions, AC & DSTC Systems

If the climate control is working properly, do not look for a hole in the whole.

Added after 1 [minutes]:

Do you know German ? https://www.motor-talk.de/forum/v50-fehler-lueftungsanlage-innenraum-ccm-0070-t5687292.html

My friend, the program's hint regarding the communication of the air-conditioning panel is very good, that it suggests something with a subordinate module .. And it is not surprising that the panel is associated with heating or parktronics (or even - the second suggestion from the top, A / C request - with the engine ), because it is he who sends messages on the bus to the controller to enable a given function in it. It's not what you think. Well, it has been a standard for some time due to the saving of wires in a bundle, for example. I wonder what you mean with this heating, because I take this line of reasoning for total ignorance of what and how about this CAN, because in the event of a communication break, Volvo always indicates the controller from which the answer is expected - which also the other two errors (i.e. SAS -> BCM direction as well as AUM -> CEM) you can see that it is. And that's how they should be understood. Because Volvo must be understood.

It is extremely important in such situations to observe what in the car does not work as intended, because people do not care. For example, they consider the lack of a turn signal buzzer or some "former stupidities" to be insignificant, or temporary, when in fact it may be a sign of a serious CAN fault (including vehicle immobilization).

It might be different, because you don't know what's going on. There are three options. 1 - when the errors are active, it means that the functions related to the broken / non-existent connection are disabled. For example, in the event of a steering sensor failure, the traction control will stop working and I suspect that this is the case, because I cannot imagine it otherwise. Sometimes there are no more important messages and the symptoms are, so to speak, visible to the naked eye. 2 - if the error is passive, but it keeps coming back, it means that the so-called The "default message" is not received on request, an error appears that appears as remembered, but nevertheless the integrity of the system is not broken or limited in a manner imperceptible to the car driver. Ie. the symptoms may be more or less severe, or may not be completely noticeable. 3 - has the right to not work all or some of the controllers, but the non-working ones may be completely dead, or (which is easy to deduce) it may be a random fault (e.g. due to poor contact) and mean difficulties with localization. Usually, however, if no one knows what is, we have the option of no. 3 and then no computer will help, only knowledge of CAN and logical thinking. And if you do not understand it, it is important to know that breaking communication is the need to restore it immediately, keeping your hands away from any calibrations, etc. that may aggravate errors in the system. Often the result of not heating the engine or the cabin, because as I said when it passes, no one has a clue what was the reason. Funny, but it happens when the car is not driven much. . The problem is whether the fault will return, and this is already the Virgin Mary. Usually it is about tracing the source by measuring the resistance of the twisted pair, its voltage. The module, twisted pair, terminator, connector, bad sensor, fuse, etc. may be damaged.

There is no universal prescription for CAN and each case is individual (so I'm aiming for it). Maybe you didn't even dream about it, because the unplugged ankle of the radio complicates the matter to some extent. It is about the lack of a 120? terminator that could be in it, although I do not know it. I would not say it as if in practice it was not confirmed (probably fiat doblo from what I know). Therefore, I repeat, every detail that may seem irrelevant is important. The blame on the twisted pair is actually forgotten, because it is not a truck, but there are a lot of possibilities. Component activation is this plus the current parameters, and there are two types of them in this car: two-wire CAN and single-wire LIN (as in BMW).

Perhaps the configuration error is something else (but something like that), except that the CAN error can be fixed immediately.
Transmission errors can be divided into two types again:
- detectable and explainable (those recorded)
- undetectable and unpredictable (perceived as driver's interference, i.e. cruise control waves, etc.)

Volvo instructions press hard to rule out errors in the fieldbus when calibrating or coding.
Without it, there's really nothing to talk about.

My friend about the VIDA program is summer next to my bag. But I know the truck program and what is said in the instructions. They will half-point everything, and this is the excess of hints in non-existent modules. And that's the truth. Half of them have no idea about the effects of a CAN malfunction. The fault of any sensor as a result of proper operation is still possible (with a factory defect at the forefront, which I do not want to say directly), and you don't get it, because it happens. That's why it's good to have a rule that in the past electronics was not so developed. Ie. if there is a fault of the torsion sensor, unfastening the ankle will fix the errors on the bus. This is for peasant reason. Besides, they are like AQS (cabin air sensor) etc.

Added after 2 [hours] 2 [minutes]:

In case of illustrating what it looks like, please see the LIN diagram of the V70 air-conditioning panel.



Signs:

SHM - seat heating module
DMM - damper motor module
ECC - electronic climate control system
CCM - Climate Control Module
AQS - air quality sensor
LHD - left hand drive
RHD - right hand drive

CAN looks similar, but much more extensive.

Buddy, there is nothing to rediscover America, because with an active CAN error, this system is seriously damaged and some modules work in emergency mode. Like any vehicle with a similar fault, it is badly damaged. Therefore, as I said, hands away from coding on a malfunctioning bus. And although the symptoms may not be noticeable as serious, it should be presumed that until they are corrected they may appear, and even pose a hazard on the road, and remember it. It's not like you code something and the error disappears, only the fault is a physical damage of a nature unstable as evidenced by DSC what works when it wants, and you don't know the source of the problem (check connectors, harnesses, etc.).

eurotips wrote:

to change anything in Car Config it's just an Authorized Service Center

As an example of what is not allowed to do this, I am pasting a translation of an almost identical error from the Volva D7C bus (twin year old) over which we are sitting at the moment, because it's all like peas against the wall normally. As if I speak Japanese to you. Needless to say, almost identical ones are now being lost successively while restoring communication.