P1746

DTC P1746, DTC P1747 [LA4A-EL]





TROUBLESHOOTING HINT
Fall-safe
P1746
- Unconditionally unlock Torque Converter Clutch (TCC)
- Maximum pressure due to malfunction
P1747
- EPC minimum static pressure increased
- Maximum pressure due to malfunction

EPC solenoid description
- The EPC solenoid is a Variable Force Style (VFC) solenoid. The VFC type solenoid is an electro-hydraulic actuator combining a solenoid and regulator valve.
- This solenoid provides Electronic Pressure Control (EPC) which regulates Line Pressure (LP) and Line Modulator (LM) pressure. This is controlled by producing a resisting pressure to the main regulator and line modulator circuit. The LP and LM pressure control the clutch application pressure.





EPC solenoid specification

DIAGNOSTIC PROCEDURE





Step 1 - 4





Step 5 - 11