P0745

DTC P0745 LINE PRESSURE SOLENOID VALVE

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

NOTE: 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.





ON BOARD DIAGNOSIS LOGIC

DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE





NOTE: If DIAGNOSTIC TROUBLE CODE 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 5 seconds.

With GST
Follow the procedure With CONSULT-II.

Wiring Diagram-AT-LPSV

AT-LPSV-01:

AT-LPSV-01





TERMINAL AND REFERENCE VALUE MEASURED BETWEEN EACH TERMINAL

Diagnostic Procedure
1. CHECK VALVE RESISTANCE
1. Turn ignition switch to OFF position.
2. Disconnect terminal cord assembly connector in engine compartment.





3. Check resistance between terminal 4 and around.
OK or NG
OK >> GO TO 2.
NG >>
1. Remove control valve assembly.
2. Check the following items:
- Line pressure solenoid valve
Refer to Component Inspection.
- Harness of terminal cord assembly for short or open

2. CHECK POWER SOURCE CIRCUIT
1. Turn ignition switch to OFF position.
2. Disconnect TCM harness connector.





3. Check resistance between terminal 4 and TCM harness connector terminal 2
OK or NG
OK >> GO TO 3.
NG >> Check the following items:
- Dropping resistor
Refer to DROPPING RESISTOR.
- Harness for short or open between TCM terminal 2 and terminal cord assembly (Main harness)

3. CHECK POWER SOURCE CIRCUIT
1. Turn ignition switch to OFF position.





2. Check resistance between terminal 4 and TCM harness connector terminal 1.
If OK, check harness for short to ground and short to power.
3. Reinstall any part removed.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.

4. CHECK DTC
Perform AT-173, DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE.
OK or NG
OK >> INSPECTION END
NG >>
1. Perform TCM input/output signal inspection. Pinout Values and Diagnostic Parameters
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

Component Inspection
LINE PRESSURE SOLENOID VALVE
-

Resistance Check








- Check resistance between two terminals.

Operation Check





- Check solenoid valve by listening for its operating sound while applying battery voltage to the terminal and ground.

DROPPING RESISTOR





- Check resistance between two terminals.
Resistance: 10 - 15 ohms