CVT RE0F10A Transmission Fluid Pressure SEN/SW A

P0840 TRANSMISSION FLUID PRESSURE SEN/SW A

Description

The secondary pressure sensor detects secondary pressure of CVT and sends TCM the signal.


DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE

NOTE:
If "DTC CONFIRMATION PROCEDURE" has been previously performed, always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.

1. CHECK DTC DETECTION

With CONSULT
1.Turn ignition switch ON.
2.Select "DATA MONITOR".
3.Make sure that output voltage of CVT fluid temperature sensor is within the range below.





4.Start engine and wait for at least 5 consecutive seconds.
With GST
Follow the procedure "With CONSULT".
Is "P0840" detected?
YES- Go to "Diagnosis Procedure".
NO- Check intermittent incident. Intermittent Incident.


Diagnosis Procedure


1. CHECK INPUT SIGNAL






1.Start engine.
2.Check voltage between TCM harness connector F16 terminal
15 and ground.





3.Turn ignition switch OFF.
Is the inspection result normal?
YES- Check intermittent incident. Intermittent Incident
NO- GO TO 2.

2. CHECK POWER AND SENSOR GROUND






1.Turn ignition switch ON.
2.Check voltage between TCM harness connector F16 terminals
25 and 26.





Is the inspection result normal?
YES- GO TO 3.
NO- Go to CVT RE0F10A TCM.

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

1.Turn ignition switch OFF.
2.Disconnect TCM harness 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 HARNESS 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. Refer to "DTC Logic".
2.Perform "SELF-DIAG RESULTS" mode for "TRANSMISSION".
Is only "P0840" detected?
YES-1 ("P0840" only)-There is a malfunction of the CVT fluid temperature sensor. Replace the control valve. Removal And Installation.

YES-2 ("P0840" and other DTC)-Replace the transaxle assembly. Removal And Installation.
NO- Check intermittent incident. Intermittent Incident.