EVAP Leak Check Module and Its Circuit Inspection

EVAP Leak Check Module and Its Circuit Inspection

NOTE: For operation of EVAP leak check module, refer to EVAP Leak Check System Description.

EVAP Leak Check Pressure Sensor Circuit Check
1. Connect SUZUKI scan tool to DLC with ignition switch OFF.
2. Turn ignition switch to ON position, select DATA LIST mode on SUZUKI scan tool.
3. Check that displayed barometric pressure is specified value. If barometric pressure is within specified value, EVAP leak check pressure sensor and its circuit are in good condition. If barometric pressure is out of specification, check EVAP leak check pressure sensor, wire harness and connections.

EVAP Leak Detecting Pump Circuit Check
1. Turn ignition switch to ON position, clear DTC and select MISC TEST mode on SUZUKI scan tool.




2. Using SUZUKI scan tool, check that operating sound of EVAP leak detecting pump is heard only when pump is switched ON. If operating sound of EVAP leak detecting pump is heard, EVAP leak detecting pump and its circuit are in good condition. If operating sound of EVAP leak detecting pump is not heard, check EVAP leak detecting pump, wire harness and connections.

EVAP Canister Vent Valve Circuit Check
1. Connect SUZUKI scan tool (1) to DLC (2) with ignition switch turned OFF.
2. Turn ignition switch to ON position, clear DTC and select MISC TEST mode on SUZUKI scan tool.




3. Check that operating sound of EVAP canister vent valve (3) is heard only when EVAP canister vent valve is switched ON and OFF using SUZUKI scan tool. If operating sound of EVAP canister vent valve is not heard, check EVAP canister vent valve, wire harness and connections.