P0841

P0841 TRANSMISSION FLUID PRESSURE SEN/SW A

Description

A malfunction of oil pressure sensor function is detected by mutual monitoring between secondary pressure sensor and line pressure.


DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


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 "VEHICLE SPEED".
4.Drive the vehicle.
5.Maintain the following conditions for 5 seconds or more.

VEHICLE SPEED : More than 30 km/h (19 MPH)

6.Stop the vehicle.
7.Select "Self Diagnostic Results" in "TRANSMISSION".
Is "P0841" 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 SECONDARY PRESSURE SENSOR SYSTEM

Check secondary pressure sensor system. P0840.
Is the inspection result normal?
YES- GO TO 3.
NO- Repair or replace damaged parts.

3. CHECK SECONDARY PRESSURE SOLENOID VALVE

Check line pressure solenoid valve. .
Is the inspection result normal?
YES- GO TO 4.
NO- Line pressure solenoid valve is malfunctioning. Replace transaxle assembly. Exploded View.

4. CHECK SECONDARY PRESSURE SOLENOID VALVE

Check secondary pressure solenoid valve. .
Is the inspection result normal?
YES- GO TO 5.
NO- Secondary pressure solenoid valve is malfunctioning. Replace transaxle assembly. Exploded View.

5. CHECK STEP MOTOR SYSTEM

Check step motor system. P1777.
Is the inspection result normal?
YES- GO TO 6.
NO- Repair or replace damaged parts.

6. 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.


Component Inspection (Secondary Pressure Solenoid Valve)


1. CHECK SECONDARY PRESSURE SOLENOID VALVE

Check resistance between CVT unit harness connector terminal and ground.





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