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fuel delivery system leak down test

French translation: test de fuite

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GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)
English term or phrase:leak down test
French translation:test de fuite
Entered by: gemots
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19:23 May 8, 2001
English to French translations [PRO]
Tech/Engineering
English term or phrase: fuel delivery system leak down test
automotive
gemots
Local time: 06:10
test de fuite du circuit d'alimentation
Explanation:
According to OBD-II (On-Board Diagnostic version II) regulation, now enforced in the US since some years and coming into enforcement in Europe, the whole fuel system, including tank, pipes, filling neck, etc, must be leak-proof.
The OBD protocol mentions a test in which the purge and vent valves of the canister (reservoir filled with coal captating the fuel vapors) are closed, and a special pump pressurizes the canister, that remains in connection with the tank and filler neck. Pressure must not change for a specific amount of time; else specific DTC (Diagnostic Trouble Codes) are raised for MIL code 031: small leak (P0442) or large leak (P0445). OBD codes are a standard and can be read with any diagnostic tool from the diagnostic connector, usually located under the dashboard, driver's side.
The "leak down" means that the fuel system is in pressure for the test, and thus the pressure drops down in case of leak: this is a pressure test, not a vacuum test.
Please note from experience that the MIL code 031 with small or large leak is the most common occurrence of turning on the MIL "Check engine", most often simply because the filler neck has not been properly closed after filling the tank!
I have a number of references of these in OBD II manuals and workshop manuals from various manufacturers, unfortunately these are on paper format or under Non-Disclosure Agreement.


Selected response from:

Didier Fourcot
Local time: 12:10
Grading comment
Many thanks. You have been a great help.
4 KudoZ points were awarded for this answer

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Summary of answers provided
natest de fuite du circuit d'alimentation
Didier Fourcot
naessai de fuite vers le bas du système d'alimentation en carburant
Michael Kowalewski


  

Answers


13 mins
essai de fuite vers le bas du système d'alimentation en carburant


Explanation:
I'm not positive that "vers le bas" is necessary.


    automotive glossary
Michael Kowalewski
United States
Native speaker of: Native in EnglishEnglish
Login to enter a peer comment (or grade)

6 hrs
test de fuite du circuit d'alimentation


Explanation:
According to OBD-II (On-Board Diagnostic version II) regulation, now enforced in the US since some years and coming into enforcement in Europe, the whole fuel system, including tank, pipes, filling neck, etc, must be leak-proof.
The OBD protocol mentions a test in which the purge and vent valves of the canister (reservoir filled with coal captating the fuel vapors) are closed, and a special pump pressurizes the canister, that remains in connection with the tank and filler neck. Pressure must not change for a specific amount of time; else specific DTC (Diagnostic Trouble Codes) are raised for MIL code 031: small leak (P0442) or large leak (P0445). OBD codes are a standard and can be read with any diagnostic tool from the diagnostic connector, usually located under the dashboard, driver's side.
The "leak down" means that the fuel system is in pressure for the test, and thus the pressure drops down in case of leak: this is a pressure test, not a vacuum test.
Please note from experience that the MIL code 031 with small or large leak is the most common occurrence of turning on the MIL "Check engine", most often simply because the filler neck has not been properly closed after filling the tank!
I have a number of references of these in OBD II manuals and workshop manuals from various manufacturers, unfortunately these are on paper format or under Non-Disclosure Agreement.




Didier Fourcot
Local time: 12:10
Native speaker of: Native in FrenchFrench
PRO pts in pair: 5463
Grading comment
Many thanks. You have been a great help.
Login to enter a peer comment (or grade)




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