DTC P0741[FN4A-EL]

id0502a1807900

DTC P0741

Torque converter clutch (TCC) stuck off
DETECTION CONDITION
•  When all conditions below are satisfied.
―  Engine running
―  ATF temperature 20 °C {68 °F} or more
―  Driving in 4GR at D range
―  Turbine speed within 225—4,987 rpm
―  Vehicle speed within 60—100 km/h {37—62 mph}
―  Torque converter clutch (TCC) operating
―  Shift solenoid A duty value exceeds 99%
―  Difference between engine speed and turbine speed more than 100 rpm
―  None of the following DTCs are present: P0706, P0707, P0708, P0712, P0713, P0715, P0720, P0751, P0752, P0753, P0756, P0757, P0758, P0761, P0762, P0763, P0766, P0767, P0768, P0771, P0772, P0773
Diagnostic support note:
•  This is a continuous monitor (CCM).
•  The MIL does not illuminate if PCM detects the above malfunction conditions during first the drive cycle.
•  A PENDING CODE is not available.
•  FREEZE FRAME DATA is not available.
•  The AT warning light illuminates
•  The DTC is stored in the PCM memory.
POSSIBLE CAUSE
•  ATF level low
•  Deteriorated ATF
•  Shift solenoids A, B, C, D, E, and pressure control solenoid stuck
•  Line pressure low
•  2-4 brake band slipping
•  3-4 clutch slipping
•  Control valve stuck
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related Service Information available?
Yes
Perform repair or diagnosis according to the available Service Information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
2
INSPECT ATF CONDITION
•  Turn the ignition switch to the LOCK position.
•  Inspect the ATF condition.
―  Clear red: Normal
―  Milky: Water mixed in fluid
―  Reddish brown: Deteriorated ATF
•  Is it normal?
Yes
Go to the next step.
No
If the ATF color is milky or reddish brown, replace ATF, then go to Step 4.
(See AUTOMATIC TRANSAXLE FLUID (ATF) REPLACEMENT[FN4A-EL].)
3
INSPECT ATF LEVEL
•  Start the engine.
•  Warm up the ATX.
•  Is the ATF level within the specification?
Yes
Go to the next step.
No
Add ATF to the specified level, then go to Step 6.
(See AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION[FN4A-EL].)
4
INSPECT LINE PRESSURE
•  Start the engine.
•  Measure the line pressures.
•  Are the line pressures within the specifications?
Yes
Go to the next step.
No
•  All ranges: Replace the oil pump or control valve body, then go to Step 6.
•  Any ranges: Replace the ATX, then go to Step 6.
(See ATX Workshop Manual FN4A-EL.)
5
INSPECT OPERATION OF EACH VALVE AND EACH SPRING
•  Turn the ignition switch to the LOCK position.
•  Remove the control valve body.
•  Disassemble the control valve body.
•  Is each valve operation normal and is the return spring normal?
(See ATX Workshop Manual FN4A-EL.)
Yes
Replace the ATX, then go to the next step
(See ATX Workshop Manual FN4A-EL.)
No
Repair or replace the shift valve and return spring, then go to the next step.
(See CONTROL VALVE BODY REMOVAL[FN4A-EL].)
(See CONTROL VALVE BODY INSTALLATION[FN4A-EL].)
(See ATX Workshop Manual FN4A-EL.)
6
VERIFY TROUBLESHOOTING OF DTC P0741 COMPLETED
•  Make sure to reconnect all the disconnected connectors.
•  Clear the DTC from the memory using the M-MDS.
•  Start the engine.
•  Warm up engine and ATX.
•  Drive the vehicle under the following conditions for 5 s or more.
―  ATF temperature: 20 °C {68 °F} or more
―  Drive in the D range, 4GR (TCC operation)
―  Vehicle speed (VSS PID): within 60—100 km/h {37—62 mph}
•  Are any DTCs present?
Yes
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION[ZJ, ZY, Z6].)
(See PCM REMOVAL/INSTALLATION[LF, L3].)
No
Go to the next step.
7
VERIFY AFTER REPAIR PROCEDURE
•  Perform the "After Repair Procedure".
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE[FN4A-EL].)
No
DTC troubleshooting completed.