Polo 9N: Adjust Service Interval Settings

Hello!

My parents own a 9N 1.9 TDI 74kw (AXR) from the year 2003. The problem is that the settings for the service interval display are completely messed up. The issue started when an independent workshop, during an oil change, changed the interval setting from "flexible" to "fixed." When it was time for the next oil change, I tried to revert the changes using VAG-COM / VCDS, but I wasn't entirely successful.

Today I changed the oil again (after approximately 20,000 km). Afterwards, I wanted to reset the service interval display using VCDS. There's a function in the main menu called "Service Reminder Interval Reset" or simply "SRI Reset." However, after the program connected to the control unit, it displayed a message stating that my control unit with part number [...] is not supported and then stopped. Consequently, I will have to reset the individual entries in the control unit myself using adaptation.

Therefore, I urgently need your help. I would be extremely grateful if someone could go through all the channels with me one by one so that everything is finally correct: A) The extended maintenance interval/long-life oil setting, and B) the reset after an early oil change.

I would really appreciate it if someone could check what the channels of the StG (likely referring to a specific device or system) should look like.

If it helps, I'll post here a summary of the messed-up settings as they are currently stored in my STG. [size=85](The information is from OpenOBD.org)[/size]

Quote:

-> Channel 39 (TOG sensor) (only with WIV). Deactivation of the temperature and oil level sensor (TOG). 0 - disabled. 1 - activated IS = 1 (correct???). -> Channel 40 (distance since last service) (from model year 2000 onwards). This value indicates the distance traveled since the last service, measured in kilometers. Changed during the oil change from 192 to 0. -> Channel 41 (Time since service). This value indicates the number of days since the last service. Changed during oil change from 444 to 0. -> Channel 42 (Minimum distance to oil). This value indicates the minimum distance to the next oil change, specified in kilometers. 00015 - not long-life. Is = 150 (Correct? Or should it be Value = 15?!) -> Channel 43 (Maximum distance to oil). This value indicates the maximum distance (in kilometers) that can be driven before the next oil change is required. 015 - not long-life. 300 - Gasoline engines (long life). 500 - Diesel engines (long life). Is = 500 -> Kanal 44 (Max. Time until service). This value specifies the maximum time until the next service, measured in days. 00365 - Not a long-life product (12 months). 00730 - Extended Warranty (24 months) Is = 730 -> Channel 45 (oil quality) 1 - Fixed maintenance interval. 2 - Flexible maintenance interval. Is = 2 -> Channel 47 (exhaust leak) (diesel only). The displayed value is a reference value for the service indicator. The shown value is a calculated value representing the amount of soot in the engine oil, based on a distance of 100 kilometers. Is = 286 Question: Should I set the value to 0 after the oil change? Or is "286" a kind of "multiplier" that shouldn't be reset? -> Channel 48 (thermal load) (diesel only). The displayed value is a reference value for the service indicator. The shown value is a calculated value representing the thermal stress on the engine oil, based on a distance of 100 kilometers. Is = 150. Same question: After the oil change, should it be set to "0" or left alone? Channel 49 (minimum time interval). The time is given in days. 365 - Fixed maintenance interval (12 months). 730 - Flexible maintenance interval (24 months). Is = 365

You are my last hope. Of course, I've already tried using the search function, but unfortunately, I haven't found anything regarding the 9N model. Maybe someone here owns a 9N and can post the corresponding entries from their Polo. *hopeful*
Best regards,
Frank.

Which version of VCDS are you using? The 9N should be compatible with the assistant function.

Best regards, Rainer.

Good evening!

I just installed version 907.3. That should be the latest version, I think.

Best regards,
Frank.

Hello Michael!

Thank you for your reply. I just went back to the car and reset the soot entry and thermal load values to zero. After that, I checked channels 42 and 43 again:

Kanal 42 = Min. Distance to the oil field.
Kanal 43 = Max. Distance to the oil field.

Okay, something isn't right. According to OpenOBD.org, you should take the stored value x 1.000. However, VCDS sees it differently: It displays the text "Channel Description" (or whatever the official name is) at the top.

(Channel 42) Minimum oil level at 100 km.
(Channel 43) Maximum oil value within 100 km.

So, if I'm to trust VCDS, then channel 42 (minimum distance) should be 150 and channel 43 (maximum distance) should be 500. Personally, I now believe that the factor of 100 from VCDS is actually correct, and there seems to be a consistent typo in OpenOBD. This is also supported by the description in OpenOBD, which states: "If channel 42 = 15, then LongLife is deactivated." As mentioned, according to VCDS, it should be "150".
And on channel 43, the value of 500 would perfectly match (500 x 100 = 50,000).

Do you understand what I mean?

And then I have another question: As you've corrected the numbers now, Channel 44 represents the maximum time until service.
Kanal 49 = Min. Time until service.
the same value = 730.
Isn't that contradictory? Logically speaking, wouldn't that mean the service indicator always lights up exactly every 730 days?! What's "flexible" about that then?!

Best regards,
Frank.

Typically, things are structured like this within the corporation:

-> Kanal 42 (Min. Performance)
Minimum value of mileage at intervals of 1000 km.

-> Kanal 43 (Max. Performance)
Maximum kilometers per charge, displayed in increments of 1000 km.

-> Kanal 44 (Max. Time.
Maximum time interval in days.

*edit* 73 for 730 days.

-> Channel 45 (oil quality)

However, I'm not entirely sure about the specific dates... at least, that was the case with the older models.

Ideally, the channels should also adjust themselves if you use long-life oil.
"You set it up and then reset the service... (channel 2 to '0')"
Then you should be able to see the correct values.

TDI-GTI-4-Motion wrote:

Channel 49 (minimum time interval). The time is given in days. 365 - Fixed maintenance interval (12 months). 730 - Flexible maintenance interval (24 months). Is = 365 Incorrect, 730 is the correct answer.

Are you sure that the information on OpenOBD and in the label file from VCDS is correct?
The longlife interval for the Polo 9N TDI is typically between 15,000 and 50,000 km or 1 to 2 years.
If you enter 730 as both the minimum and maximum time interval, does the AI assume a fixed period of 2 years and only calculate the kilometers based on that assumption?

spiderschwein wrote:

Are you sure that the information on OpenOBD and in the label file from VCDS is correct?

I'm assuming that, however, I didn't write that into the label file myself.
Your line of thought is correct, but not fully developed. What do you do when you have a driver who racks up 50,000 kilometers in 8 months? Do you understand what I mean by that?