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EXCESSIVE SHIFT SHOCK FROM N TO D OR N TO R POSITION [ET6A-EL (US)]

EXCESSIVE SHIFT SHOCK FROM N TO D OR N TO R POSITION [ET6A-EL (US)]

SM2566140

id0503n21020n5

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 malfunctions
4. Poor installation or worn of engine mount, suspension
5. 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 vehicles)?
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 [ET6A-EL (US)].)
3
PERFORM INITIAL LEARNING, N TO D POSITION LEARNING, AND N TO R POSITION LEARNING
• Perform the Initial Learning. (See INITIAL LEARNING [ET6A-EL (US)].)
• 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 “FAST IDLE/RUNS ON”. (See FAST IDLE/RUNS ON [SKYACTIV-G (US)].)
• 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. (See PID/DATA MONITOR INSPECTION.)
― APP (APP sensor)
― ENG_RPM (CKP sensor)
• Is there any malfunction? (See PID/DATA MONITOR TABLE [PCM (SKYACTIV-G (US))].)
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 (WITHOUT CYLINDER DEACTIVATION (US))].)
No
Symptom troubleshooting is completed.