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European cars DTC setting procedure

  • guafa
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10 Jul 2021 12:15 #49925 by guafa
Hello guys,

Looking for any book, guide, TBS, website (anything actually) which allows me to know the strategies/procedures european car (specially at moment Renault systems) use to set DTC's.

Thanks in advance

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11 Jul 2021 11:36 #49937 by Noah
Replied by Noah on topic European cars DTC setting procedure
When I need that information I resort to the shops service information subscription.
All Data, Mitchell and identafix are the most common subscriptions I see shops using here in the U.S.A.
They buy the information from the manufacturer and sell it to independents, so it's not uncommon for some information to get "lost in translation."
The other option is to go right to the source. Many manufacturers will sell you subscriptions of varying length, a few days up to a year.
There aren't any Renault branded vehicles here, so I can't speak specifically to what they may offer, but if that's the brand you're most focused on then I would attempt to purchase a sub directly through them.

-Seems to me that I could live my life, a lot better than I think I am.
I guess that's why call me The Working Man.-
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11 Jul 2021 13:09 - 11 Jul 2021 13:11 #49951 by guafa
Replied by guafa on topic European cars DTC setting procedure
Thank you Noah, could you please guide me a little bit more in deep?

Following, an example of what i can extract from Mitchel for 94 Buick Roadmaster P0101 code. "PCM monitors the MAF sensor frequency and can determine if sensor is stuck low, stuck high, not providing the airflow value expected for a given operating condition, or that the signal variation expected during normal operation is not present.
This test checks for a stuck MAF sensor signal. If MAF sensor frequency varies less than a predetermined minimum amount, DTC will set
."

I would like to find something about "That given operating condition". For instance:
*ECT above 185F
*Vehicle speed at about 45MPH more than 2 minutes
*Heavy load
*TPS above 70%
*Then if frequency is below XXX KHz, the code will be set like "pending" for the next 3 cycles and on the fourth cycle, MIL will be set ON

Thanks in advance
Last edit: 11 Jul 2021 13:11 by guafa.

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12 Jul 2021 19:02 #49983 by Noah
Replied by Noah on topic European cars DTC setting procedure
Unfortunately, it's going to be hit or miss depending on the information available.
For that particular vehicle and that particular code, the service information I have available to me has virtually no code set criteria.
I find that is pretty common of pre obd, even pre CAN vehicles.
A better example from something I worked on last week is this 2006 Silverado with a knock sensor code:
 
Another service information might provide more information on the example you choose considering the Buick, it may not. 
You don't know what you won't know until you know. 
 

-Seems to me that I could live my life, a lot better than I think I am.
I guess that's why call me The Working Man.-
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