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EXCESSIVE SHIFT SHOCK ON TORQUE CONVERTER CLUTCH (TCC) [ET6A-EL, ET6AX-EL (E)]

id0503n61022n8

Troubleshooting item

Excessive shift shock on torque converter clutch (TCC)

Description

•  Strong shock is felt when TCC is engaged.

Possible cause

1.  Insufficient TCM learning (Insufficient TCC learning)

2.  Signal malfunction

―  APP sensor malfunction

―  CKP sensor malfunction

3.  Torque converter malfunction

4.  Engine control system malfunction

System wiring diagram

•  Not applicable

Connector diagram

•  Not applicable

Troubleshooting item	Excessive shift shock on torque converter clutch (TCC)
Description	• Strong shock is felt when TCC is engaged.
Possible cause	1. Insufficient TCM learning (Insufficient TCC learning) 2. Signal malfunction ― APP sensor malfunction ― CKP sensor malfunction 3. Torque converter malfunction 4. Engine control system malfunction
System wiring diagram	• Not applicable
Connector diagram	• Not applicable

Diagnostic Procedure

Note

• If a DTC is stored in the PCM, the malfunction may be resolved by repairing the malfunctioning location.

Step

Inspection

Results

Action

1

PERFORM INITIAL LEARNING AND TCC LEARNING

Perform the initial learning.
(See INITIAL LEARNING [ET6A-EL, ET6AX-EL (E)].)

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 SIGNAL PARTS FOR MALFUNCTION

•  Inspect the value at the following PCM PIDs using the M-MDS.
(See PID/DATA MONITOR INSPECTION.)

―  APP1 (APP sensor No.1)

―  APP2 (APP sensor No.2)

―  ENG_RPM (CKP sensor)

•  Is there any malfunction?
(See PID/DATA MONITOR TABLE [PCM (SKYACTIV-G (E))].)

(See PID/DATA MONITOR TABLE [PCM (SKYACTIV-X)].)

(See PID/DATA MONITOR TABLE [PCM (SKYACTIV-D)].)

Yes

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

No

Replace the automatic transaxle.

(See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [ET6A-EL (SKYACTIV-G 2.0, SKYACTIV-G 2.5) (E)].)

(See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [ET6AX-EL (SKYACTIV-G 2.0, SKYACTIV-G 2.5) (E)].)

(See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [ET6A-EL (SKYACTIV-X 2.0)].)

(See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [ET6AX-EL (SKYACTIV-X 2.0)].)

(See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [ET6A-EL (SKYACTIV-D 1.8)].)

(See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [ET6AX-EL (SKYACTIV-D 1.8)].)

Step	Inspection	Results	Action
1	PERFORM INITIAL LEARNING AND TCC LEARNING Perform the initial learning. (See INITIAL LEARNING [ET6A-EL, ET6AX-EL (E)].) 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.
1		No	Go to the next step.
2	INSPECT SIGNAL PARTS FOR MALFUNCTION • Inspect the value at the following PCM PIDs using the M-MDS. (See PID/DATA MONITOR INSPECTION.) ― APP1 (APP sensor No.1) ― APP2 (APP sensor No.2) ― ENG_RPM (CKP sensor) • Is there any malfunction? (See PID/DATA MONITOR TABLE [PCM (SKYACTIV-G (E))].) (See PID/DATA MONITOR TABLE [PCM (SKYACTIV-X)].) (See PID/DATA MONITOR TABLE [PCM (SKYACTIV-D)].)	Yes	Repair or replace any malfunctioning parts according to the inspection result.
2		No	Replace the automatic transaxle. (See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [ET6A-EL (SKYACTIV-G 2.0, SKYACTIV-G 2.5) (E)].) (See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [ET6AX-EL (SKYACTIV-G 2.0, SKYACTIV-G 2.5) (E)].) (See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [ET6A-EL (SKYACTIV-X 2.0)].) (See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [ET6AX-EL (SKYACTIV-X 2.0)].) (See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [ET6A-EL (SKYACTIV-D 1.8)].) (See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [ET6AX-EL (SKYACTIV-D 1.8)].)