EXCESSIVE SHIFT SHOCK FROM N TO D OR N TO R POSITION [GW6A-EL, GW6AX-EL]

id050320102000

TROUBLESHOOTING ITEM

Excessive shift shock from N to D or N to R position
DESCRIPTION
•  Strong shock is felt when shifting from N to D or N to R position at idle.
POSSIBLE CAUSE
1.  Insufficient TCM learning (Insufficient learning in N to D position or N to R position)
2.  Not within idle speed specification
3.  Signal malfunction
?  APP sensor malfunction
?  CKP sensor malfunction
4.  Poor installation or worn of engine mount, suspension
5.  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 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].)
3
PERFORM INITIAL LEARNING, N TO D POSITION LEARNING, AND N TO R POSITION LEARNING
Perform the Initial Learning.
Perform N to D position learning using the following procedure:
(1) The ATF temperature is 30 °C {86 °F} or more.
(2) Shift the selector lever from P position to N position.
(3) Shift the selector lever from N position to D position and wait for 5 s or more while holding the lever in the D position.
(4) Shift the selector lever from D position to N position and wait for 5 s or more while holding the lever in the N position.
(5) Perform the procedures (3) to (4) above ten times.
Perform N to R position learning using the following procedure:
(1) The ATF temperature is 60 °C {140 °F} or more.
(2) Shift the selector lever from P position to N position.
(3) Shift the selector lever from N position to R position and wait for 5 s or more while holding the lever in the R position.
(4) Shift the selector lever from R position to N position and wait for 5 s or more while holding the lever in the N position.
(5) Perform the procedures (3) to (4) above ten times.
•  Does the symptom disappear?
Yes
Symptom troubleshooting is completed.
No
Go to the next step.
4
INSPECT ENGINE CONTROL SYSTEM FOR MALFUNCTION
•  Perform the symptom troubleshooting “NO.9 FAST IDLE/RUNS ON”.
•  Is there any malfunction?
Yes
Repair or replace any malfunctioning parts according to the inspection result.
No
Go to the next step.
5
INSPECT SIGNAL PARTS FOR MALFUNCTION
•  Inspect the value at the following PCM PIDs using the M-MDS.
?  APP (APP sensor)
?  RPM (CKP sensor)
•  Is there any malfunction?
Yes
Repair or replace any malfunctioning parts according to the inspection result.
No
Go to the next step.
6
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 2.5T].)
No
Go to the next step.
7
VERIFY IF MALFUNCTION CAUSE IS ENGINE CONTROL SYSTEM
•  Inspect the engine condition.
•  Is there any malfunction?
Yes
Go to the appropriate symptom troubleshooting.
(See SYMPTOM DIAGNOSTIC INDEX [SKYACTIV-G 2.5T].)
No
Symptom troubleshooting is completed.