CVT

P0745 PRESSURE CONTROL SOLENOID A

Description

- The line pressure solenoid valve is included in the control valve assembly.
- 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.


CONSULT Reference Value in Data Monitor Mode

Remarks: Specification data are reference values.







On Board Diagnosis Logic

- This is an OBD-II self-diagnostic item.
- Diagnostic trouble code "P0745" with CONSULT is detected under the following conditions.
- TCM detects an improper voltage drop when it tries to operate the solenoid valve.
- When TCM compares target value with monitor value and detects an irregularity.


Possible Cause

- Harness or connectors (Solenoid circuit is open or shorted.)
- Line pressure solenoid valve


DTC Confirmation Procedure

NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch OFF and wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.

WITH CONSULT

1.Turn ignition switch ON and select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT.
2.Start engine and wait at least 5 seconds.
3.If DTC is detected, go to .

WITH GST

Follow the procedure "WITH CONSULT".


Wiring Diagram - CVT - LPSV







TCM TERMINALS AND REFERENCE VALUES

Trouble Diagnosis.


Diagnosis Procedure


1. CHECK INPUT SIGNAL

With CONSULT
1.Start engine.
2.Select "MAIN SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT.
3.Read out the value of "ISOLT-2".





Without CONSULT
1.Start engine.
2.Check voltage between TCM connector terminal and ground.










3.Turn ignition switch OFF.
4.Disconnect TCM connector.
5.Check if there is continuity between connector terminal and ground.
OK or NG
OK - GO TO 5.
NG- GO TO 2.

2. CHECK LINE PRESSURE SOLENOID VALVE CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect TCM connector.





3.Check resistance between TCM connector terminal and ground.





OK or NG
OK - GO TO 5.
NG- GO TO 3.

3. CHECK VALVE RESISTANCE

1.Turn ignition switch OFF.
2.Disconnect CVT unit harness connector.





3.Check resistance between CVT unit harness connector terminal and ground.





OK or NG
OK - GO TO 4.
NG- Replace the transaxle assembly. Transaxle Assembly.

4. CHECK HARNESS BETWEEN TCM AND LINE PRESSURE SOLENOID VALVE






1.Turn ignition switch OFF.
2.Disconnect CVT unit harness connector and TCM connector.
3.Check continuity between TCM connector terminal and CVT unit harness connector terminal.





4.If OK, check harness for short to ground and short to power.
5.If OK, check continuity between ground and CVT assembly.
6.Reinstall any part removed.
OK or NG
OK- GO TO 5.
NG- Repair open circuit or short to ground or short to power in harness or connectors.

5. CHECK DTC

Perform .
OK or NG
OK-INSPECTION END
NG- GO TO 6.

6. CHECK TCM

1.Check TCM terminals and reference values. Trouble Diagnosis.
2.If NG, re-check TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK-INSPECTION END
NG- 1.Repair or replace damaged parts.
2.Replace the transaxle assembly. Transaxle Assembly.


Component Inspection


LINE PRESSURE SOLENOID VALVE

1.Turn ignition switch OFF.
2.Disconnect CVT unit harness connector.





3.Check resistance between CVT unit harness connector terminal and ground.





4.If NG, replace the transaxle assembly. Transaxle Assembly.