Code No. P0841:
Abnormality in Secondary Pressure Sensor Function
DIAGNOSTIC FUNCTION
CVT-ECU determines that the system is defective by monitoring the secondary pressure sensor.
JUDGEMENT CRITERIA
- The difference between the actual and target secondary pressures remains
more than 0.675 MPa for 5 seconds while the vehicle is driven at constant speed.
PROBABLE CAUSES
- Malfunction of the CVT assembly (Faulty secondary pressure sensor or valve
body assembly)
|
STEP 1. Hydraulic pressure test
|
|
Refer to .
|
|
Q.
Is the check result normal?
|
|
Go to Step 2.
|
|
|
|
Repair the failure sections.
|
|
|
|
STEP 2. Check the following connector
|
|
Check the terminals for a contact status problem and internal short circuit.
|
|
Q.
Is the check result normal?
|
|
Go to Step 3.
|
|
|
|
Repair the defective connector.
|
|
|
|
STEP 3. Voltage measurement at CVT-ECU connector (LPRS terminal)
|
|
(1)Connect the CVT-ECU connector.
|
|
(2)Drive the vehicle until the engine is warmed up.
|
|
(3)Selector lever position: P range.
|
|
(5)Measure the CVT-ECU connector side by backprobing.
|
|
(6)Measure the voltage between the CVT-ECU connector (LPRS terminal) and CVT-ECU connector
(SGND terminal). OK: approx. 0.84 V
|
|
Q.
Is the check result normal?
|
|
Go to Step 4.
|
|
|
|
Refer to diagnosis code No.P0842: Secondary Pressure Sensor (low voltage) ,
or diagnosis code No.P0843: Secondary Pressure Sensor (high voltage) .
|
|
|
|
STEP 4. Symptom recheck after erasing diagnosis code
|
|
Q.
Is the diagnosis code stored?
|
|
Replace the CVT assembly.
|
|
|
|
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent
Malfunctions .).
|
|
|