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-III
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.





5. Select "Self Diagnostic Results" in "TRANSMISSION".
With GST
Follow the procedure "With CONSULT-III".
Is "P0840" detected?
YES - Go to SEE Diagnosis Procedure.
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 DTC (TCM)
With CONSULT-III
1. Perform "DTC CONFIRMATION PROCEDURE". P0740.
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. Exploded View Removal And Installation, Removal And Installation (AWD).
NO - Check intermittent incident. Intermittent Incident.