TROUBLESHOOTING ITEM

Excessive shift shock on torque converter clutch (TCC)

DESCRIPTION

• Strong shock is felt when TCC is engaged.

POSSIBLE CAUSE

• Insufficient TCM learning (Insufficient TCC learning)

• Signal malfunction

• APP sensor malfunction

• CKP sensor malfunction

• Torque converter malfunction

Item (definition)

Unit/Condition

Definition

Condition/Specification (Reference)

APP

%

Accelerator pedal position

• Accelerator pedal released: Approx. 0%

• Accelerator pedal depressed: Approx. 100%

RPM

RPM

Engine speed

• Displays engine speed

STEP

INSPECTION

ACTION

1

• Perform the initial learning.

  (See INITIAL LEARNING [FW6A-EL].)

• Perform TCC learning using the following procedure:

• (1) The ATF temperature is 20 °C {68 °F} or more.

• (2) Constantly maintain the accelerator pedal opening angle between 20 % to 60 %.

• (3) Accelerate the vehicle from a stop to 1st gear and from 1st to 2nd gear.

• (4) Perform the shifting above (3) ten times.

• Does the symptom disappear?

Yes

Symptom troubleshooting is completed.

No

Go to the next step.

2

• Inspect the value at the following PCM PIDs using the M-MDS.

  (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.5].)

• APP (APP sensor)

• RPM (CKP sensor)

• Is there any malfunction?

Yes

Repair or replace any malfunctioning parts according to the inspection result.

No

Replace the automatic transaxle.

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