EXCESSIVE SHIFT SHOCK IS FELT WHEN UPSHIFTING AND DOWNSHIFTING [GW6A-EL, GW6AX-EL]

id050320102100

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

Diagnostic procedure

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

STEP

INSPECTION

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?
Yes
Symptom troubleshooting is completed.
No
Go to the next step.
2
PERFORM INITIAL LEARNING
•  Perform the initial learning.
•  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 [GW6A-EL, GW6AX-EL].)
4
INSPECT SIGNAL PARTS FOR MALFUNCTION
•  Inspect the value at the following PCM PID using the M-MDS.
?  APP (APP sensor)
•  Is there any malfunction?
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 DTC TABLE [PCM (SKYACTIV-G 2.5T)].)
No
Symptom troubleshooting is completed.