9. Canister control valve driving stage (see Table 1-11) Table 1-11 43 Diagnostic Trouble Code (DTC) Trouble Location or Type P0444 Evaporative emission control system, canister control valve circuit open P0445 Evaporative emission control system, canister control valve circuit short S/N Operation Test Results Actions 1 Start the engine, keep idle speed until the coolant reaches normal temperature. Next step 2 Disconnect the canister control valve from the harness. Measure the voltage between the two pins with a multimeter. Is the voltage about 12V?
Yes Next step No 5 (check hot wire) 3 Connect the canister control valve, increase the engine rotation speed to 1500r/m, touch the valve with your hand, and check the valve for slight vibration and shock. Yes Next step No 7 (check ground wire) 4 Measure the resistance between pin (1) and pin (2) with a multimeter. Is the resistance between 22 and 30? Yes Replace ECU No Check canister control valve 5 Check for open or short circuit between pin J1-02 of the main relay and the pin (1) of the canister control valve with a multimeter. Yes Repair or replace harness No Next step 6 Repari or replace the main relay and its circuit. 7 Stop the engine.
Check for open or short circuit between pin J1-63 of the ECU and the pin (2) of the canister control valve with a multimeter. Yes Repair or replace harness No Replace ECU