Leak Detection Pump (LDP) V144 Pressure Buildup, Checking

Leak Detection Pump (LDP) V144 Pressure Buildup, Checking

Test conditions:
- Evaporative Emissions Tester KLI 9210 with Adapter Hose KLI 9210/55-1 connected to vehicle







- Valve - D - is at "Hold"
- Diagnostic mode 8 ended and vehicle running in idle

Fuel system must have no pressure for the test. To release residual pressure, proceed as follows:







- Briefly open quick-release coupling between ventilation line - A - and Adapter Hose KLI 9210/55-1 so pressure in fuel system is reduced. The pressure gauge - D - on Evaporative Emissions Tester KLI 9210 must drop to 0 in. H2O.
- Select Guided Functions operating mode on evaporative emissions tester.
- Select "Check tank ventilation system for leaks" guided function.
- Activate test.
- Observe pressure gauge while test is running.
- The Leak Detection Pump (LDP) V144 must pump the fuel system up to min. 18 mbar (7 in. H2O).
- If pressure is not reached, check Leak Detection Pump (LDP) V144 vacuum supply.
- If fuel system has no leaks and the Leak Detection Pump (LDP) V144 vacuum supply is OK, replace Leak Detection Pump (LDP) V144.