P0840

P0840 TRANSMISSION FLUID PRESSURE SEN/SW A

DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. PREPARATION BEFORE WORK

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. CHECK DTC DETECTION

With CONSULT
1.Start the engine.
2.Select "Data Monitor" in "TRANSMISSION".
3.Select "ATF TEMP SEN".
4.Maintain the following condition for 5 seconds or more.

ATF TEMP SEN : 2.41 V or less

5.Select "Self Diagnostic Results" in "TRANSMISSION".
With GST
Follow the procedure "With CONSULT".
Is "P0840" detected?
YES- Go to .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK TCM INPUT SIGNAL

1.Start the engine.
2.Check voltage between TCM connector terminals.





Is the inspection result normal?
YES- Check intermittent incident. Intermittent Incident.
NO- GO TO 2.

2. CHECK SENSOR POWER AND SENSOR GROUND

Check voltage between TCM connector terminals.





Is the inspection result normal?
YES- GO TO 3.
NO- Go to P1701.

3. CHECK CIRCUIT BETWEEN TCM AND CVT UNIT (SECONDARY PRESSURE SENSOR) (PART 1)

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





Is the inspection result normal?
YES- GO TO 4.
NO- Repair or replace damaged parts.

4. CHECK CIRCUIT BETWEEN TCM AND CVT UNIT (SECONDARY PRESSURE SENSOR) (PART 2)

Check continuity between TCM harness connector terminals and ground.





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

5. 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 6.
NO- Repair or replace damaged parts.

6. CHECK TERMINAL CORD ASSEMBLY (PART 2)

Check terminal cord assembly harness cladding for damage.
Is the inspection result normal?
YES- GO TO 7.
NO- Repair or replace damaged parts.

7. CHECK DTC (TCM)

With CONSULT
1.Perform "DTC CONFIRMATION PROCEDURE". .
2.Select "Self Diagnostic Results" in "TRANSMISSION".
Is "P0840" detected?
YES-1 (Only "P0840" is detected)-There is a malfunction of the secondary pressure sensor. Replace the control valve. Removal And Installation.
YES-2 ("P0840" and other than "P0840" are detected)-Replace the transaxle assembly. Removal And Installation (2WD) or Removal And Installation (AWD).
NO- Check intermittent incident. Intermittent Incident.