P0773 (blink 64, U441E) on Toyota Corolla E120: SL SOLENOID VALVE ELECTRICAL MALFUNCTION
Short answer: P0773 means “SL SOLENOID VALVE ELECTRICAL MALFUNCTION”. The car’s computer has found a fault in the ECT U441E system. First check: workshop check order (RM821E): INSPECT TRANSMISSION WIRE(SL) -> CHECK WIRE HARNESS AND CONNECTOR(Transmission wire−ECU) -> INSPECT LOCK UP CONTROL SOLENOID ASSY(SL).
- Code
- P0773 · blink 64
- System
- ECT U441E
- Dashboard light
- CHECK ENGINE (MIL) does NOT light (DTC stored in memory only)
- Applies to
- 4-speed A/T U441E. Not a PK fitment (the PK EPC lists only A246E and U340E). Other-market fitment unverified.
- Confidence
- high (official Toyota RM821E)
- Source
- toyotamanuals.gitlab.io
Symptoms and when it is set
- Either (a) or (b) is detected for 1 time. (2−trip detection logic) (a) Solenoid resistance is 8 W or less for short circuit when solenoid is energized. (b) Solenoid resistance is 100 kW or more for open circuit when solenoid is not energized.
Likely causes
- Transmission wire; Wire harness; SL solenoid valve; Engine and ECT ECU
What to check, in order
- Workshop check order (RM821E): INSPECT TRANSMISSION WIRE(SL) -> CHECK WIRE HARNESS AND CONNECTOR(Transmission wire−ECU) -> INSPECT LOCK UP CONTROL SOLENOID ASSY(SL)
Related on this car
- A245E/A246E automatic (PK 1.6 = A246E): harsh/flare 2-3 shift, slips, TCC codes
- All fault codes for this car
- Warning lights
- Where the parts are (parts map)
- Common problems
Same code on other cars
Clearing the code does not fix the fault. If it comes back, the problem is still there. For brakes, airbags and steering, see a trained mechanic.