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EXCESSIVE SHIFT SHOCK IS FELT WHEN UPSHIFTING AND DOWNSHIFTING [ET6A-EL, ET6AX-EL (E)]

id0503n61021n8

Troubleshooting item

Excessive shift shock is felt when upshifting and downshifting

Description

•  Excessive shift shock is felt when depressing accelerator pedal to accelerate at upshifting.

•  During cruising, excessive shift shock is felt when depressing accelerator pedal at downshifting.

Possible cause

1.  Insufficient TCM learning

2.  Signal malfunction

―  APP sensor malfunction

3.  Poor installation or worn of engine mount, suspension

4.  Engine control system malfunction

System wiring diagram

•  Not applicable

Connector diagram

•  Not applicable

Troubleshooting item	Excessive shift shock is felt when upshifting and downshifting
Description	• Excessive shift shock is felt when depressing accelerator pedal to accelerate at upshifting. • During cruising, excessive shift shock is felt when depressing accelerator pedal at downshifting.
Possible cause	1. Insufficient TCM learning 2. Signal malfunction ― APP sensor malfunction 3. Poor installation or worn of engine mount, suspension 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

VERIFY MALFUNCTION SYMPTOM

•  Is the malfunction symptom (shift shock/shifting time) at the same level compared to a vehicle of the same model (ET6A-EL, ET6AX-EL vehicles)?

Yes

Symptom troubleshooting is completed.

No

Go to the next step.

2

PERFORM INITIAL LEARNING

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

•  Does the symptom disappear?

Yes

Symptom troubleshooting is completed.

No

Go to the next step.

3

PERFORM ON-BOARD DIAGNOSTIC TO VERIFY HYDRAULIC PRESSURE SWITCH OPERATION PRESSURE

•  Is the operation pressure normal?

Yes

Go to the next step.

No

Replace the control valve body.

(See CONTROL VALVE BODY REMOVAL/INSTALLATION [ET6A-EL, ET6AX-EL (E)].)

4

INSPECT SIGNAL PARTS FOR MALFUNCTION

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

―  APP1 (APP sensor No.1)

―  APP2 (APP sensor No.2)

•  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

Go to the next step.

5

INSPECT ENGINE MOUNT/SUSPENSION FOR POOR TIGHTENING

•  Is there any malfunction?

Yes

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

(See ENGINE REMOVAL/INSTALLATION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (E))].)

(See ENGINE REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (E))].)

(See ENGINE REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)

(See ENGINE REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)

No

Symptom troubleshooting is completed.

Step	Inspection	Results	Action
1	VERIFY MALFUNCTION SYMPTOM • Is the malfunction symptom (shift shock/shifting time) at the same level compared to a vehicle of the same model (ET6A-EL, ET6AX-EL vehicles)?	Yes	Symptom troubleshooting is completed.
1		No	Go to the next step.
2	PERFORM INITIAL LEARNING • Perform the initial learning. (See INITIAL LEARNING [ET6A-EL, ET6AX-EL (E)].) • Does the symptom disappear?	Yes	Symptom troubleshooting is completed.
2		No	Go to the next step.
3	PERFORM ON-BOARD DIAGNOSTIC TO VERIFY HYDRAULIC PRESSURE SWITCH OPERATION PRESSURE • Is the operation pressure normal?	Yes	Go to the next step.
3		No	Replace the control valve body. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [ET6A-EL, ET6AX-EL (E)].)
4	INSPECT SIGNAL PARTS FOR MALFUNCTION • Inspect the value at the following PCM PID using the M-MDS. (See PID/DATA MONITOR INSPECTION.) ― APP1 (APP sensor No.1) ― APP2 (APP sensor No.2) • 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.
4		No	Go to the next step.
5	INSPECT ENGINE MOUNT/SUSPENSION FOR POOR TIGHTENING • Is there any malfunction?	Yes	Repair or replace any malfunctioning parts according to the inspection result. (See ENGINE REMOVAL/INSTALLATION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (E))].) (See ENGINE REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (E))].) (See ENGINE REMOVAL/INSTALLATION [SKYACTIV-X 2.0].) (See ENGINE REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
5		No	Symptom troubleshooting is completed.