Can't reset "Service Now!" message

[DV52]

^^^ hmm............ not sure that it's correct to say that the car needs to be taken to the dealer to re-set any aspect of the servicing regime on a mk7.

Fact is that at least for the aspects of car servicing related to distance traveled and elapsed time since last service -ALL of the numbers are accessible to anyone with a diagnostic device that can access adaptation channels in the hex17 module.

The underlying principles for the way that servicing is managed on early model mk7s is like this:

There are 2 x servicing types:

• ESI - this means "Extended Servicing Interval" and it applies if the car has extra measuring equipment that enables the vehicle to calculate a variable service interval based on the car's actual usage. It's possible to switch-on ESI, but the proper calculation needs a car with the PR number “QG1“. The PR number is on the vehicle data carrier.
• FIX - most cars use this facility; the service interval is based on the distance traveled and the time period set by values in the adaptation channels in module hex17 (read below).

For "FIX", there are 3 x parameters for each of the time period and distance traveled like this:

• Time/Distance traveled since last inspection - self explanatory, the number is increased automatically by the car, or it can be set separately by the user
• Maximum Time/Distance until next inspection - this sets a predetermined service interval and generally in Australia the factory values are 365 days and/or 1,500 kms
• Reset value for next Time/Distance-dependent inspection- this facility automatically resets the number in the Time/Distance traveled since last inspection if this is not done by the servicing agent. On most early model mk7's, the factory values used were twice the values in Maximum Time/Distance until next inspection. Note: resetting the value in Time/Distance traveled since last inspection does NOT reset the alarm message that appears on the dash (this is done via a separate adaptation channel)

So - there ain't nothing special about changing any aspect of these channels; it certainly isn't a matter that needs ODIS, or a visit to the dealer

Finally, just to round-off the discussion, here are the factory values for the FIX channels from a MY15 mk7 (from VCDS):

IDE03349-FIX: Max. distance until next mileage-related inspection	15000 km
IDE03350-FIX: Maximum time until next time-dependent inspection	365 d
IDE03351-FIX: Distance covered since last mileage-dependent inspection	7000 km
IDE03352-FIX: Time since last time-dependent inspection	321 d

On later MQB platform vehicles, these channels have been deleted:

IDE05931-FIX: Reset value for next mileage-dependent inspection	30000 km
IDE05932-FIX: Reset value for next time-dependent inspections	730 d

And here is a screen-shot of the same channels from a mk7 using OBD11:




Don