DTC P2758 [AW6A-EL, AW6AX-EL]

id050211805200

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

•  Deteriorated ATF

•  ATF level low

•  Line pressure malfunction

―  Oil pump malfunction

―  Control valve stuck

•  TCC control solenoid stuck

•  Torque converter malfunction

•  TCM malfunction

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	• Deteriorated ATF • ATF level low • Line pressure malfunction ― Oil pump malfunction ― Control valve stuck • TCC control solenoid 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 on the repair order?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2	VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Verify related repair 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.
2		No	Go to the next step.
3	INSPECT ATF CONDITION • Inspect the ATF condition. (See AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION [AW6A-EL, AW6AX-EL].) • Is it normal?	Yes	Go to the next step.
3		No	Replace the ATF, then go to Step 7.
4	INSPECT ATF LEVEL • Inspect the ATF level. (See AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION [AW6A-EL, AW6AX-EL].) • Is it normal?	Yes	Go to the next step.
4		No	Add ATF to the specified level, then go to Step 7.
5	INSPECT LINE PRESSURE • Perform the “Line Pressures Test”. (See MECHANICAL SYSTEM TEST [AW6A-EL, AW6AX-EL].) • Is there any malfunction?	Yes	All ranges: Replace the oil pump, then go to Step 7. Any ranges: Replace the control valve body, then go to Step 7. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [AW6A-EL, AW6AX-EL].)
5		No	Go to the next step.
6	INSPECT TCC CONTROL SOLENOID • Inspect the TCC control solenoid. (See SOLENOID VALVE INSPECTION [AW6A-EL, AW6AX-EL].) • Is there any malfunction?	Yes	Replace the control valve body, then go to the next step. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [AW6A-EL, AW6AX-EL].)
6		No	Replace the Torque converter, then go to the next step. (See TORQUE CONVERTER 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 for2 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].)
7		No	Go to the next step.
8	VERIFY AFTER REPAIR PROCEDURE • Perform the “After Repair Procedure”. (See AFTER REPAIR PROCEDURE [AW6A-EL, AW6AX-EL].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [AW6A-EL, AW6AX-EL].)
8		No	DTC troubleshooting completed.