Leak Detector: Testing and Inspection

DIAGNOSIS MODULE - TANK LEAKAGE(DMTL)
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.

DIAGNOSIS MODULE - TANK LEAKAGE (DMTL)
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.

Circuit Diagram:

TROUBLESHOOTING HINTS




1. DM-TL Control Signal

2. DM-TL operating conditions.

1. DM-TL monitoring operation starts only after all the conditions below are met.
- Vehicle soaking over 4 hours and 30 minutes.
- Engine coolant temperature over 2.3 °C (36.14 °F) when starting.
- Ambient temperature between 1.5 °C(34.7 °F) and 40.5 °C (104.9 °F).
- 6.4 l or more gasoline in the fuel tank.
- Over 20 minutes driving after starting.
- During Air Bag is not working.

2. And also you can check the DM-TL operation with simulation mode of HI-SCAN.

Harness Inspection Procedures: