DTC P0741 (EXCEPT FOR GENERAL (L.H.D.) SPECS. SPORT AT) [FN4A-EL]

id0502a18079a6

DTC P0741

Torque converter clutch (TCC) stuck OFF

DETECTION CONDITION

• When all conditions below satisfied.
- ATF temperature 20 °C {68 °F} or above.
- Driving in 4GR at D range.
- Engine run.
- Turbine speed within 225-4,988 rpm.
- Vehicle speed within 60-100 km/h {37-62 mph}.
- TCC operation
- Shift solenoid A duty value exceeds 99%
- Power or normal mode
- Difference between engine speed and turbine speed more than 100 rpm
- Any of the following not generated: DTC P0500, P0706, P0707, P0708, P0712, P0713, P0715, P0751, P0752, P0753, P0756, P0757, P0758, P0761, P0762, P0763, P0766, P0767, P0768, P0771, P0772, P0773.
Diagnostic support note:
• This is a continuous monitor (CCM).
• MIL does not illuminate if PCM detects the above malfunction conditions during first drive cycle.
• PENDING CODE is not available.
• FREEZE FRAME DATA is not available.
• HOLD indicator light flashes.
• 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 REPAIR INFORMATION AVAILABILITY

• Check for related Service Bulletins availability.
• Is any related repair information available?
Yes
Perform repair or diagnosis according to available repair information.
• If vehicle is not repaired, go to next step.
No
Go to next step.
2

CHECK ATF CONDITION

• Turn ignition key to OFF.
• Check ATF condition.
- Clear red: Normal
- Milky: Water mixed in fluid
- Reddish brown: Deteriorated ATF
• Is it okay?
Yes
Go to next step.
No
If ATF color milky or reddish brown, replace ATF, then go to Step 4.
3

CHECK ATF LEVEL

• Start engine.
• Warm up ATX.
• Is ATF level within specification?
Yes
Go to next step.
No
Adjust ATF level, then go to Step 6.
4

INSPECT LINE PRESSURE

• Start engine.
• Measure line pressure.

Specification

Idle: 330-470 kPa {3.4-4.7 kgf/cm2, 49-66 psi}

Stall: 1,160-1,320 kPa {11.9-13.4 kgf/cm2, 170-190 psi}

• Is line pressure within specification?
Yes
Go to next step.
No
• All ranges: Replace oil pump or control valve body, then go to Step 6.
• Any ranges: Replace ATX, then go to Step 6.
(See ATX Workshop Manual FN4A-EL.)
5

CHECK OPERATION OF EACH VALVE AND EACH SPRING

• Turn ignition key to OFF.
• Remove control valve body.
• Disassemble control valve body.
• Is each valve operation okay and is return spring okay?
(See ATX Workshop Manual FN4A-EL.)
Yes
Replace ATX, then go to next step
(See ATX Workshop Manual FN4A-EL.)
No
Repair or replace shift valve and return spring, then go to next step.
(See ATX Workshop Manual FN4A-EL.)
6

VERIFY TROUBLESHOOTING OF DTC P0741 COMPLETED

• Make sure to reconnect all disconnected connectors.
• Clear DTC from memory using WDS or equivalent.
• Start engine.
• Warm up engine and ATX.
• Drive vehicle under following conditions for 5 seconds or more.
- ATF temperature: 20 °C {68 °F} or above
- Drive in D range, 4th gear (TCC operation)
- Vehicle speed (VSS PID): within 60-100 km/h {37-62 mph}
• Are any DTCs present?
Yes
Replace PCM, then go to next step.
No
Go to next step.
7

VERIFY AFTER REPAIR PROCEDURE

• Perform "After Repair Procedure".
• Are any DTCs present?
Yes
Go to applicable DTC inspection.
No
Troubleshooting completed.