20. DTC: P0444, Canister Control Valve Driving Stage Control Circuit Voltage Too Low (see
Table 1-33)
Table 1-33
S/N Operation Test Results Actions
1
Connect the diagnostic instrument and adapter, and turn the
ignition switch to ON.
Next step
Yes Go to step 4
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?
No Next step
Yes
Repair or replace
harness
3
Check for open circuit or short to ground at the power supply
end of the control valve.
No Go to step 2
Yes Next step
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℃?
No Replace control valve
Yes Diagnosis help
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?
No Next step
Yes
Repair or replace
harness
6
Check for short to ground between the pin 2# of the control
valve and the pin 46# of the ECU.
No Diagnosis help
To Next Page
Loading...