DTC P2758 [AW6A-EL, AW6AX-EL]

id0502j7805200

DTC P2758

Torque converter clutch (TCC) stuck on
DETECTION CONDITION
•  All of the following conditions are satisfied under each of the following accelerator conditions.
―  ATF temperature 20 °C {68 °F} or more
―  Driving in D range
―  Engine running
―  Engine speed within 1,000—3,000rpm
―  Torque converter clutch (TCC) no operating
―  Difference between engine speed and turbine revolution speed less than 30 rpm
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
•  TCC control solenoid stuck
•  Line pressure low
•  Control valve stuck
•  Torque converter malfunction
•  TCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
•  Has the FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related repair information available?
Yes
Perform repair or diagnosis according to the available repair information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
INSPECT ATF CONDITION
•  Turn the ignition switch to the LOCK position.
•  Inspect the ATF condition.
―  Clear red: Normal
―  Light red (pink): 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 7.
(See AUTOMATIC TRANSAXLE FLUID (ATF) REPLACEMENT [AW6A-EL, AW6AX-EL].)
4
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 7.
(See AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION [AW6A-EL, AW6AX-EL].)
5
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, then go to Step 7.
Any ranges: Replace the control valve body, then go to Step 6.
(See CONTROL VALVE BODY REMOVAL/INSTALLATION [AW6A-EL, AW6AX-EL].)
6
INSPECT TCC CONTROL SOLENOID
•  Inspect the TCC control solenoid.
•  Is it normal?
Yes
Replace the Torque converter, then go to the next step.
(See TORQUE CONVERTER REMOVAL/INSTALLATION [AW6A-EL, AW6AX-EL].)
No
Replace the control valve body, then go to the next step.
(See CONTROL VALVE BODY REMOVAL/INSTALLATION [AW6A-EL, AW6AX-EL].)
7
VERIFY TROUBLESHOOTING OF DTC P2758 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 2 s or more.
―  ATF temperature (TFT PID):20 °C {68 °F} or more
―  Engine speed: less than 3,000 rpm
―  Drive in the D range, 4GR—6GR (TCC no operation)
•  Are any DTCs present?
Yes
Replace the TCM, then go to the next step.
(See TCM REMOVAL/INSTALLATION [AW6A-EL, AW6AX-EL].)
No
Go to the next step.
8
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “After Repair Procedure”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [AW6A-EL, AW6AX-EL].)
No
DTC troubleshooting completed.