23A-DTC P0841 SECONDARY PRESSURE SENSOR MALFUNCTION

Code No. P0841: Abnormality in Secondary Pressure Sensor Function

DIAGNOSTIC FUNCTION

TCM determines that the system is defective by monitoring the secondary pressure sensor.

JUDGMENT CRITERIA

The difference between the actual and target secondary pressures remains more than 0.675 MPa (97.9 psi) for 5 seconds while the vehicle is driven at constant speed.

PROBABLE CAUSES

DIAGNOSIS

STEP 1. Hydraulic pressure test.

Refer to

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.

Is the check result normal?

Go to Step 3

Repair the defective connector.

STEP 3. Voltage measurement at TCM connector (LPRS terminal).

(1) Connect the TCM connector.

(2) Drive the vehicle until the engine is warmed up.

(3) Transmission range: "P" range

(4) Engine: Idling

(5) Measure the TCM connector side by backprobing.

(6) Measure the voltage between the TCM connector (LPRS terminal) and TCM connector (SGND terminal).

OK: approximately 0.84 V

Is the check result normal?

Go to Step 4

Refer to DTC P0842: Secondary Pressure Sensor (low voltage)

, or DTC P0843: Secondary Pressure Sensor (high voltage)

STEP 4. Symptom recheck after erasing DTC.

(1) Erase the DTC.

(2) Turn the ignition switch to the "LOCK" (OFF) position, and then wait for one minute. Then drive the vehicle until the engine has been warmed up.

(3) Check if the DTC is stored.

Is the DTC stored?

Go to Step 5

Intermittent malfunction (Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions

STEP 5. CVT belt inspection.

Check the appearance of the CVT belt. (Refer to On-vehicle Service – CVT Belt Inspection

)

Is the CVT belt normal?

Replace valve body assembly. (Refer to

Replace the transaxle assembly (Refer to