P0740

P0740 TORQUE CONVERTER

DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


CAUTION:
Always drive vehicle at a safe speed.

1. PREPARATION BEFORE WORK (PART 1)

If another "DTC CONFIRMATION PROCEDURE" occurs just before, turn ignition switch OFF and wait for at least 10 seconds, then perform the next test.
- GO TO 2.

2. PREPARATION BEFORE WORK (PART 2)

With CONSULT
1.Start the engine.
2.Select "Data Monitor" in "TRANSMISSION".
3.Select "ATF TEMP SEN".
Is the value of "ATF TEMP SEN" 2.17 V or less?
YES- GO TO 3.
NO- 1.Warm the transaxle.
2.GO TO 3.

3. CHECK DTC DETECTION

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

VEHICLE SPEED : 40 km/h (25 MPH) or more

6.Stop the vehicle.
7.Select "Self Diagnostic Results" in "TRANSMISSION".
With GST
Follow the procedure "With CONSULT".
Is "P0740" detected?
YES- Go to .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK TORQUE CONVERTER CLUTCH SOLENOID VALVE

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





Is the inspection result normal?
YES- GO TO 2.
NO- GO TO 4.

2. CHECK CIRCUIT BETWEEN TCM AND CVT UNIT (TORQUE CONVERTER CLUTCH SOLENOID

VALVE) (PART 1)
1.Disconnect TCM harness connector.
2.Check continuity between TCM harness connector terminal and CVT unit harness connector terminal.





Is the inspection result normal?
YES- GO TO 3.
NO- Repair or replace damaged parts.

3. CHECK CIRCUIT BETWEEN TCM AND CVT UNIT (TORQUE CONVERTER CLUTCH SOLENOID

VALVE) (PART 2)
Check continuity between TCM harness connector terminal and ground.





Is the inspection result normal?
YES- Check intermittent incident. Intermittent Incident.
NO- Repair or replace damaged parts.

4. CHECK TERMINAL CORD ASSEMBLY (PART 1)

1.Remove terminal cord assembly. Exploded View.
2.Check continuity between CVT unit harness connector terminals and control valve harness connector terminals.





Is the inspection result normal?
YES- GO TO 5.
NO- Repair or replace damaged parts.

5. CHECK TERMINAL CORD ASSEMBLY (PART 2)

Check terminal cord assembly harness cladding for damage.
Is the inspection result normal?
YES- GO TO 6.
NO- Repair or replace damaged parts.

6. CHECK DTC (TCM)

With CONSULT
1.Perform "DTC CONFIRMATION PROCEDURE". .
2.Select "Self Diagnostic Results" in "TRANSMISSION".
Is "P0740" detected?
YES-1 (Only "P0740" is detected)-There is a malfunction of the torque converter clutch solenoid valve.
Replace the control valve. Removal And Installation.
YES-2 ("P0740" and other than "P0740" are detected)-Replace the transaxle assembly. Removal And Installation (2WD) or Removal And Installation (AWD).
NO- Check intermittent incident. Intermittent Incident.