Code No. P0741: Damper Clutch System (Stuck Off), P0742 Damper Clutch System (Stuck ON)




DIAGNOSIS CODE SET CONDITIONS

PROBABLE CAUSES




DIAGNOSIS PROCEDURE


STEP 1. Hydraulic pressure test


Refer to .

Q. Is the check result normal?

Go to Step 2.
Repair or replace the failure section.

STEP 2. Check the lock-up and low-reverse brake linear solenoid.


Check for P0743 (lock-up and low-reverse brake linear solenoid). Refer to .

Q. Is the check result normal?

Go to Step 3.
Repair or replace the failure section.

STEP 3. Check the A/T fluid temperature sensor, input shaft speed sensor, and output shaft speed sensor.


Check the following diagnosis codes: P0712 (A/T fluid temperature sensor (short circuit)), P0713 (A/T fluid temperature sensor (open circuit)), P0715 (input shaft speed sensor) and P0720 (output shaft speed sensor).
Refer to <P0712>, <P0713>, <P0715>, <P0720>.

Q. Is the check result normal?

Go to Step 4.
Repair or replace the failure section.

STEP 4. Check the malfunction of CAN communication system.


Q. Are the diagnosis code for CAN communication system malfunction (U0001, U0100, U0141, P1705, P1706) set?

Repair or replace the failure section.
Go to Step 5.

STEP 5. Check the A/T-ECU connector pin terminal and the connection status.


Q. Is the check result normal?

Replace the A/T-ECU, and then go to Step 6.
Repair or replace the failure section.

STEP 6. Erase the diagnosis code, and drive the vehicle for a while.


Check that the normal code is displayed.

Q. Is the check result normal?

The procedure is complete.
Go to Step 7.

STEP 7. Check the installation position of the engine and A/T.


Q. Is the check result normal?

Replace the transmission assembly.
Repair or replace the failure section.