DTC P2758:00

TCC: Stuck on

DETECTION CONDITION

• Vehicle condition: TCM normal during engine rotation

• Status: Detects that TCC control solenoid does not change from on

• Period: Confirmed 2 times in 1.8 s or more

FAIL-SAFE FUNCTION

• Inhibits learning control.

• Inhibits slip control.

• Inhibits accelerating from 2GR.

POSSIBLE CAUSE

• Deteriorated ATF

• ATF level low

• TCC control solenoid stuck

• Line pressure low

• Control valve body malfunction

• Automatic transmission malfunction

• TCM malfunction

SYSTEM WIRING DIAGRAM

Not applicable

STEP

INSPECTION

ACTION

1

NOTE:

• Recording can be facilitated using the screen capture of the PC function.

• Record the freeze frame data/snap shot data.

—

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

• Switch the ignition off, then ON (engine off or on).

• Perform the DTC inspection using the M-MDS.

  (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].)

• Are any other DTCs output?

Yes

Follow the applicable DTC inspection procedure, then go to the next step.

(See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (SJ6A-EL)].)

No

Go to the next step.

4

• Switch the ignition off.

• 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

Replace ATF, then go to Step 9.

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

5

• Start the engine.

• Warm-up the automatic transmission until the ATF temperature is 57.5—62.5 °C {136—144 °F}.

• 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 9.

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

6

• 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

Inspect or replace the part according to the result of the line pressure test, then go to Step 9.

7

• 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].)

8

• Switch the ignition off.

• Replace the control valve body.

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

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

• Always reconnect all disconnected connectors.

• Clear the DTC using the M-MDS.

  (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].)

• Perform the following procedure to ensure that the DTC has been resolved:

• Start the engine.

• Drive the vehicle according to each condition of the accelerator opening angle driving conditions while each monitoring value of the TFT, GEAR_SEL, TR, and SSLU_C is under the following conditions.

• TFT: 20 °C {68 °F} or more

• GEAR_SEL: 4 to 6

• TR: D

• SSLU_C: 199 mA (TCC OFF)

• Gradually slow down and stop the vehicle.

• Switch the ignition off.

• Start the engine.

• Drive the vehicle according to each condition of the accelerator opening angle driving conditions while each monitoring value of the TFT, GEAR_SEL, TR, and SSLU_C is under the following conditions.

• TFT: 20 °C {68 °F} or more

• GEAR_SEL: 4 to 6

• TR: D

• SSLU_C: 199 mA (TCC OFF)

• Perform the DTC inspection using the M-MDS.

  (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].)

• Is the same DTC present?

Yes

Replace the AT, then go Step 10.

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

No

Go to the next step.

9

• Always reconnect all disconnected connectors.

• Clear the DTC using the M-MDS.

  (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].)

• Perform the following procedure to ensure that the DTC has been resolved:

• Start the engine.

• Drive the vehicle according to each condition of the accelerator opening angle driving conditions while each monitoring value of the TFT, GEAR_SEL, TR, and SSLU_C is under the following conditions.

• TFT: 20 °C {68 °F} or more

• GEAR_SEL: 4 to 6

• TR: D

• SSLU_C: 199 mA (TCC OFF)

• Gradually slow down and stop the vehicle.

• Switch the ignition off.

• Start the engine.

• Drive the vehicle according to each condition of the accelerator opening angle driving conditions while each monitoring value of the TFT, GEAR_SEL, TR, and SSLU_C is under the following conditions.

• TFT: 20 °C {68 °F} or more

• GEAR_SEL: 4 to 6

• TR: D

• SSLU_C: 199 mA (TCC OFF)

• Perform the DTC inspection using the M-MDS.

  (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].)

• Is the same DTC present?

Yes

Replace the TCM, then go to the next step.

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

No

Go to the next step.

10

• Clear the DTC using the M-MDS.

  (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].)

• Perform the DTC inspection using the M-MDS.

  (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (SJ6A-EL)].)

No

DTC troubleshooting completed.