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)
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STEP 1. Hydraulic pressure test
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Refer to  .
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Q.
Is the check result normal?
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 Go to Step 2.
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 Repair the failure sections.
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STEP 2. Check the following connector
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Check the terminals for a contact status problem and internal short circuit.
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Q.
Is the check result normal?
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Go to Step 3.
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Repair the defective connector.
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STEP 3. Voltage measurement at CVT-ECU connector (LPRS terminal)
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(1)Connect the CVT-ECU connector.
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(2)Drive the vehicle until the engine is warmed up.
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(3)Selector lever position: P range.
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(5)Measure the CVT-ECU connector side by backprobing.
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(6)Measure the voltage between the CVT-ECU connector (LPRS terminal) and CVT-ECU connector
(SGND terminal).
OK: approx. 0.84 V
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Q.
Is the check result normal?
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Go to Step 4.
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Refer to diagnosis code No.P0842: Secondary Pressure Sensor (low voltage) ,
or diagnosis code No.P0843: Secondary Pressure Sensor (high voltage) .
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STEP 4. Symptom recheck after erasing diagnosis code
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Q.
Is the diagnosis code stored?
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Replace the CVT assembly.
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Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent
Malfunctions .).
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