P0745

Description





The line pressure solenoid valve regulates the oil pump discharge pressure to suit the driving condition in response to a signal sent from the TCM.
The line pressure duty cycle value is not consistent when the closed throttle position switch is ON. To confirm the line pressure duty cycle at low pressure, the accelerator (throttle) should be open until the closed throttle position switch is OFF.





CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE





TCM TERMINALS AND REFERENCE VALUE

ON BOARD DIAGNOSIS LOGIC
Diagnostic trouble code L/PRESS SOL/CIRC with CONSULT-II or P0745 without CONSULT-II is detected when TCM detects an improper voltage drop when it tries to operate the solenoid valve.

POSSIBLE CAUSE
Check the following items.
- Harness or connectors
(The solenoid circuit is open or shorted.)
- Line pressure solenoid valve

DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE

NOTE: If "DTC Confirmation Procedure" has been previously conducted, always turn ignition switch OFF and wait at least 5 seconds before conducting the next test.

After the repair, perform the following procedure to confirm the malfunction is eliminated.

WITH CONSULT-II








1. Turn ignition switch ON and select "DATA MONITOR" mode for "ENGINE" with CONSULT-II.
2. Depress accelerator pedal completely and wait at least 1 second.

WITH GST
Follow the procedure "With CONSULT-II".





WIRING DIAGRAM - AT - LPSV

Diagnostic Procedure





1: CHECK VALVE RESISTANCE





2: CHECK VALVE OPERATION





3: CHECK POWER SOURCE AND DROPPING RESISTOR CIRCUIT





4: DETECT MALFUNCTIONING ITEM





5: CHECK POWER SOURCE CIRCUIT





6: CHECK DTC





7: CHECK TCM INSPECTION