This is off Hyundai Service Procedure
The diagnosis module comprises an electromechanically driven pump together with a change-over valve and heater.
The engine management system measures the pump's electrical current consumption while pumping air into the canister and fuel tank to check the system's leakage.
If the electrical current consumption is over the threshold value specified before in the memory, this means that there is a tank-system leak.
2. DM-TL operating conditions.
(1) DM-TL monitoring operation starts only after all the conditions below are met.
A. Vehicle soaking over 4 hours and 30 minutes.
B. Engine coolant temperature over 2.3 C (36.14 F) when starting.
C. Ambient temperature between 1.5 C (34.7 F) and 40.5 C (104.9 F).
D. 6.4Ã or more gasoline in the fuel tank.
E. Over 20 minutes driving after starting.
F. During Air Bag is not working.
Friday, March 20th, 2009 AT 11:40 PM