DTC P2758

Torque converter clutch (TCC) stuck on

DETECTION CONDITION

• TCM detects that TCC control solenoid does not change from off when engine is running

Diagnostic support note:

• The MIL illuminates if the TCM detects the above malfunction condition in two consecutive drive cycles.

• PENDING CODE is 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, and line pressure control solenoid stuck

• Line pressure low

• Control valve stuck

• TCM malfunction

STEP

INSPECTION

ACTION

1

• 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 Service Bulletins and/or on-line 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.

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?

  (See AUTOMATIC TRANSMISSION FLUID (ATF) INSPECTION[SJ6A-EL].)

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 TRANSMISSION FLUID (ATF) REPLACEMENT [SJ6A-EL].)

4

INSPECT ATF LEVEL

• Start the engine.

• Warm up the AT.

• Is the ATF level within the specification?

  (See AUTOMATIC TRANSMISSION FLUID (ATF) LEVEL ADJUSTMENT [SJ6A-EL].)

Yes

Go to the next step.

No

Add ATF to the specified level, then go to Step 7.

(See AUTOMATIC TRANSMISSION FLUID (ATF) LEVEL ADJUSTMENT [SJ6A-EL].)

5

INSPECT LINE PRESSURE

• Start the engine.

• Measure the line pressure.

  (See MECHANICAL SYSTEM TEST[SJ6A-EL].)

• 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 [SJ6A-EL].)

(See CONTROL VALVE BODY INSTALLATION [SJ6A-EL].)

6

• Inspect the solenoid valve.

  (See SOLENOID VALVE INSPECTION [SJ6A-EL].)

• Is it normal?

Yes

Go to the next step.

No

Replace the control valve body, then go to the next step.

(See CONTROL VALVE BODY REMOVAL [SJ6A-EL].)

(See CONTROL VALVE BODY INSTALLATION [SJ6A-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 AT.

• 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 operation)

• Is PENDING CODE for this the DTC present?

Yes

Replace the TCM, then go to the next step.

(See TCM REMOVAL/INSTALLATION [SJ6A-EL].)

No

Go to the next step.

8

• Perform the “After Repair Procedure”.

  (See AFTER REPAIR PROCEDURE [SJ6A-EL].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [SJ6A-EL].)

No

DTC troubleshooting completed.