Leak Detection Valve: Testing and Inspection

EVAP Leakage Inspection




1. Disconnect purge hose from purge valve.
2. Disconnect EVAP canister air suction hose from body and plug it.
3. Connect SUZUKI scan tool to DLC with ignition switch OFF.




4. Turn tank pressure control solenoid valve ON (Valve open) by grounding E91-26 terminal of ECM connector connected to ECM.




5. While observing tank pressure displayed on SUZUKI scan tool, apply 3.5 kPa, 14 in.Aq, 26 mmHg pressure into purge hose and fuel tank and seal it.
After 15 sec., check to make sure that pressure is higher than 3.3 kpa, 13.6 in.Aq, 24.5 mmHg.
If check result is not satisfactory, locate pressure leaking point by using soap water or leak detector.




If no pressure leakage exists in vapor purge line, fuel filler cap, filler neck and etc., remove fuel tank from vehicle and check for leakage from installation face of parts installed on fuel tank, hose joint, tank pressure control valves, tank pressure control solenoid valve and refuel vapor control valve.