Toyota Corolla (E120): Evaporative emission control system

Dtc p0441 evaporative emission control system incorrect purge flow

Dtc p0446 evaporative emission control system vent control circuit

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Circuit description
The shift solenoid valve sl is turned ”on” and ”off” by signals from the ecm in order to control the hydraulic pressure operation, the lock–up relay valve, which then the controls operation of the lock–up clutch. Fail safe function: if the ecm detects a malfunction, it turns the ...

Replacement
1. Remove hood sub–assy 2. Remove cylinder head cover no.2 3. Remove battery 4. Remove battery carrier Remove the 4 bolts and battery carrier. 5. Remove air cleaner assembly with hose 6. Remove floor shift cable transmission control shift Remove the nut from the control shaf ...

Inspection procedure
Hint: hand–held tester only: narrowing down the trouble area is possible by performing ”a/f control” active test (heated oxygen sensor or other trouble areas can be distinguished). Perform active test using hand–held tester (a/f control). Perform active test using the hand–held ...