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 referring to EVAP Leak Check Pressure Sensor Check under EVAP Leak Check Module Inspection.

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 Detection Pump Circuit Check

1. Turn ignition switch to ON position, clear DTC and select Active Test mode on SUZUKI scan tool.




2. Using SUZUKI scan tool, check that operating sound of EVAP leak detection pump is heard only when pump is switched ON.

If operating sound of EVAP leak detection pump is heard, EVAP leak detection pump and its circuit are good condition.

If operating sound of EVAP leak detection pump is not heard, check EVAP leak detection pump, wire harness and connections.

EVAP Canister Vent Valve Circuit Check

1. Operate EVAP canister vent valve referring to Step 6) of EVAP Leak Check System Smoke Test.




2. Check that operating sound of EVAP canister vent valve (1) is heard only when EVAP canister vent valve is switched ON and OFF.

If operating sound of EVAP canister vent valve is heard, EVAP canister vent valve and its circuit are in good condition.

If operating sound of EVAP canister vent valve is not heard, check EVAP canister vent valve, wire harness and connections.