P0746

P0746 PRESSURE CONTROL SOLENOID A

Description

- When an abnormal gear ratio is detected on the LOW side due to a low line pressure with the line pressure solenoid valve electrically normal, this phenomenon is judged as a malfunction.
- This DTC is not caused by an electrical malfunction (circuit open or short) but is caused by a mechanical malfunction (control valve clogging, solenoid valve sticking, and others).


DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


CAUTION:
Always drive vehicle at a safe speed.

1. PRECONDITIONING

Immediately after performing any "DTC CONFIRMATION PROCEDURE", always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.
- GO TO 2.

2. PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT
1.Start the engine.
2.Select "Data Monitor" in "TRANSMISSION".
3.Select "ENG SPEED", "PRI SPEED" and "VEHICLE SPEED".
4.Drive the vehicle.
5.Maintain the following conditions for 1 seconds or more.

ENG SPEED :More than 600 rpm
PRI SPEED :More than 500 rpm
VEHICLE SPEED :More than 10 km/h (7 MPH)

6.Stop the vehicle.
7.Select "Self Diagnostic Results" in "TRANSMISSION".
With GST
Follow the procedure "With CONSULT".
Is "P0746" detected?
YES- Go to .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK LINE PRESSURE

Perform line pressure test. Testing and Inspection.
Is the inspection result normal?
YES- GO TO 2.
NO- Repair or replace damaged parts. Testing and Inspection.

2. CHECK LINE PRESSURE SOLENOID VALVE

1.Turn ignition switch OFF.
2.Disconnect CVT unit harness connector.
3.Check line pressure solenoid valve. .
Is the inspection result normal?
YES- GO TO 3.
NO- Line pressure solenoid valve is malfunctioning. Replace transaxle assembly. Exploded View.

3. CHECK PRIMARY SPEED SENSOR SYSTEM

Check primary speed sensor system. P0715.
Is the inspection result normal?
YES- GO TO 4.
NO- Repair or replace damaged parts.

4. CHECK SECONDARY SPEED SENSOR SYSTEM

Check secondary speed sensor system. P0720.
Is the inspection result normal?
YES- GO TO 5.
NO- Repair or replace damaged parts.

5. CHECK INTERMITTENT INCIDENT

Intermittent Incident.
Is the inspection result normal?
YES- Replace transaxle assembly. Exploded View.
NO- Repair or replace damaged parts.


Component Inspection (Line Pressure Solenoid Valve)


1. CHECK LINE PRESSURE SOLENOID VALVE

Check resistance between CVT unit harness connector terminal and ground.





Is the inspection result normal?
YES- INSPECTION END
NO- Line pressure solenoid valve is malfunctioning. Replace transaxle assembly. Exploded View.