2004 S60R computer relearn, drive cycle Topic is solved

swedehast · Post by **swedehast** » 23 Oct 2018, 16:19

I just recently finished a top end rebuild and in the meantime the annual registration expired.

I have paid DMV fees, but need a smog test pass.

The smog station tells me it won't pass until the computer has been through a " re-learn ", but could not give me a specific procedure for that. Neither could my " local " Volvo dealer. ? They said the problem lies in that it is a manual transmission.

Hence ergo, anyone " out there " know a proper " re-learn" for the following
California car. 2004 S60R with AWD manual transmission.

Thanks so much

Post by **E Showell** » 23 Oct 2018, 19:26

Look up "drive cycle." I think that's what they mean by relearn. It is basically a varied driving pattern that can be executed pretty specifically, or you can just drive the car a lot for a week or so and you'll probably check all the boxes for a relearn/drive cycle.

Post by **SuperHerman** » 23 Oct 2018, 19:54

Did you actually take the car to be tested or did you call on the phone?

I don't see how the car would know the difference between an air filter change as a result of a code and a top end or complete engine replacement for that matter that caused a code or codes.

The computer, on some cars (two that I have owned), will require a certain number of miles or time to elapse after the clearing of codes, but that is it. I am not aware of Volvo's having this - but I could be mistaken. I suppose it is possible the testing station has this feature.

Curious to see what others say.

deano1 · Post by **deano1** » 24 Oct 2018, 04:12

Yes all modern OBD2 equipped cars go through a process of "emission system ready" after a battery disconnect or OBD code clearing.
It's a process where as The ECM puts all the emission sensors thru there paces or resets. Stuff like O2 sensors are ready very quickly but other items such as the EVAP take a longer period to get "ready",, especially in colder weather this is why they say to do a bunch of mixed driving.. Highway and city.
No worries tho because if you have a higher end OBD scanner you can see when all is good and "Ready" so that your car can be tested.
Usually after driving for a bunch of miles and if the check engine light is off system is ready.
cheers

EngineeringBloke · Post by **EngineeringBloke** » 24 Oct 2018, 14:02

ELM adapter $12-15 from Amazon plugs into the ODB2 port under the dash. Torque Pro app for Android is $5, works with the adapter via Bluetooth and shows the readiness status of the emissions monitors as well as many other car sensor outputs. It is no Dice/Vida, but I have had mine plugged in for a few years now. I use it to clear the codes - I get P0700, P0600, p0863 for an intermittent transmission communication issue from time to time. CEM overheating perhaps.

Anyway, it is useful around annual inspection time to check that the emissions are ready.

Post by **jimmy57** » 24 Oct 2018, 15:57

The repairs shouldn't themselves make any difference in the readiness indicators the ECM stores as a result of the various test phases having completed. If the battery was disconnected for more than 2-3 minutes then the memory of the ECM was lost and the tests have to happen again.
The tests require two engine run cycles which include a warm up from engine temp below 104F. Driving at steady load, highway speed on more or less level road where a constant speed can be maintained for 4 or more miles, idling in gear for over 60 seconds, idling out of gear for >60 sec, some moderate acceleration, and then two periods where engine is hut down and left off for over 60 minutes which can be overnight.
This allows all the tests to be done twice and then the ECM will have record of the test completion stored. The completion record is the readiness indicators that in most scan tools will show as check marks or green lights.

Post by **SuperHerman** » 24 Oct 2018, 18:51

Jimmy57 - that makes sense. I did not equate the two shut down cycles (which I am aware of) with the question asked. I was thinking in the lines of an actual computer hook up. Where did you get the specific parameters mentioned (not that I question them but I didn't know they were so specific)(generally I drive the car on a few normal voyages and if I have an unresolved problem with a code that is still there it will pop up after or before three starts).

I have on several occasions gotten in one of my Volvos after having it serviced, started up and driven home without a light. Then on the next voyage have it appear upon the start. So - repair person drives it out and parks it (one), I pick it up and drive home (two) and then start it to a light (three).

Practically speaking if the OP has driven the car repeatedly for 10-15 minutes of normal usage the computer will either have sent a code if there is an issue or remained off - meaning you are good for smog testing.

Post by **jimmy57** » 24 Oct 2018, 20:18

The full procedure is in VIDA under fault tracing/symptom related diagnostic procedures/28 ignition and control systems/284 control system fuel supply/readiness code

When you open that it starts with read out of readiness codes and then selection of which situation and i selected readiness codes Not OK. that brings up the driving trip listing

Post by **abscate** » 25 Oct 2018, 11:11

SuperHerman wrote: ↑24 Oct 2018, 18:51 Jimmy57 - that makes sense. I did not equate the two shut down cycles (which I am aware of) with the question asked. I was thinking in the lines of an actual computer hook up. Where did you get the specific parameters mentioned (not that I question them but I didn't know they were so specific)(generally I drive the car on a few normal voyages and if I have an unresolved problem with a code that is still there it will pop up after or before three starts).

I have on several occasions gotten in one of my Volvos after having it serviced, started up and driven home without a light. Then on the next voyage have it appear upon the start. So - repair person drives it out and parks it (one), I pick it up and drive home (two) and then start it to a light (three).

Practically speaking if the OP has driven the car repeatedly for 10-15 minutes of normal usage the computer will either have sent a code if there is an issue or remained off - meaning you are good for smog testing.

Many codes will pend, or set without turning on the MIL or CEL (check engine light or engine icon) until they have been detected multiple times. IF a mechanic fixes a purge valve, for instance, you don't know if the problem is fixed until the EVAP cycle goes ready and tests - the absence of the CEL means little.

The smog station tells me it won't pass until the computer has been through a " re-learn ", but could not give me a specific procedure for that. Neither could my " local " Volvo dealer. ? They said the problem lies in that it is a manual transmission.

This isn't exactly confidence-inspiring in either the smog guy or the dealer

Post by **SuperHerman** » 25 Oct 2018, 11:27

I have found what you say the case many times working on Volvos. That is why I always clear codes and then run it a few voyages before claiming it to be fixed. I had a shop change my water pump once in the dead of winter. They did it three times, each time it would light for incorrect timing after I started it up after taking it home. In the end I brought it to a Volvo only shop and they retimed it correctly and the original shop foot the bill (after it accused me of going in and readjusting the timing - one of the crazier accusations I have ever received).