DTC P1728:00

Clutch slippage

DETECTION CONDITION

• Under the following conditions, turbine/input shaft speed suddenly increases 300 rpm or more for 1,450 ms:

• Engine is running.

• Vehicle speed is 5 km/h {3 mph} or more.

• There is no difference between vehicle speed signal from DSC HU/CM and output shaft speed sensor signal.

• Not shifting

• Selector lever position is D position.

• Turbine/input shaft speed is 1,200 rpm or more.

• Oil pressure switch pattern (1st—6th) is normal.

Diagnostic support note

• The check engine light does not illuminate.

• The automatic transaxle warning light does not illuminate.

• PENDING CODE is available.

• FREEZE FRAME DATA is not available.

• DTC is stored in the TCM memory.

FAIL-SAFE FUNCTION

• Inhibits malfunctioning gear.

• Limits engine torque.

• Maximizes the line pressure.

• Inhibits learning control.

• Inhibits manual mode.

• Inhibits neutral idle control.

• Inhibits AAS.

POSSIBLE CAUSE

• ATF is less than specified value

• Clutch slippage

SYSTEM WIRING DIAGRAM

Not applicable

STEP

INSPECTION

ACTION

1

• 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.

2

• Inspect the ATF level.

  (See AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION [FW6A-EL].)

• Is there any malfunction?

Yes

Adjust the ATF level to the specification, then go to the next step.

(See AUTOMATIC TRANSAXLE FLUID (ATF) REPLACEMENT [FW6A-EL].)

No

Replace the automatic transaxle, then go to the next step.

(See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [FW6A-EL].)

3

• Clear the DTC using the M-MDS.

  (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [FW6A-EL].)

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

• Drive the vehicle without shifting for 20 min or more under the following conditions:

• Vehicle speed: 5 km/h {3 mph} or more

• Selector lever position: D position

• Perform the DTC inspection using the M-MDS.

  (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [FW6A-EL].)

• Are any DTCs present?

Yes

ATF amount in Step 2 is correct

• Go to the applicable DTC inspection.

  (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [FW6A-EL].)

ATF amount adjusted in Step 2:

• Replace the automatic transaxle, then drive the vehicle to check it, and if there is no problem then the DTC troubleshooting is complete.

  (See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [FW6A-EL].)

No

DTC troubleshooting completed.