19. DTC: P0443, Canister Control Valve Driving Stage Control Circuit Trouble (see Table 1-32) Table 1-32 56 S/N Operation Test Results Actions 1 Connect the diagnostic instrument and adapter, and turn the ignition switch to ON. Next step 2 Disconnect the canister control valve from the harness. Measure the voltage between the pin 1# of the control valve and the power supply negative pole with a multimeter. Is the voltage about 12V? Yes Go to step 4 No Next step 3 Check for open circuit or short to ground at the power supply end of the control valve. Yes Repair or replace harness No Go to step 2 4 Measure the resistance between pin 1# and pin 2# with a multimeter.
Is the resistance between 22Ω and 30Ω under the temperature of 20℃? Yes Next step No Replace control valve 5 Measure the voltage between the pin 1# of the control valve and the power supply negative pole with a multimeter. Is the voltage about 3.7V? Yes Diagnosis help No Next step 6 Check for open circuit between the pin 2# of the control valve and the pin 46# of the ECU. Yes Repair or replace harness No Diagnosis help