Inspection Procedure 15: Vibration


COMMENTS ON TROUBLE SYMPTOM


If vibration occurs when driving at constant speed or when acceleration in high range, the cause is probably an abnormal torque converter pressure, or a malfunction of the engine system, damper clutch solenoid valve, valve body or torque converter.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE

STEP 1. Check when the vibration occurs.

Q. Does the vibration occur when the damper clutch is operating?
Go to Step 3.
Go to Step 2.

STEP 2. Engine system check

Q. Is the check result normal?
The inspection is complete.
Repair the engine system.

STEP 3. A/T-ECU <4M4> or engine-A/T-ECU <6G7> replacement
(1)Replace the A/T-ECU <4M4> or engine-A/T-ECU <6G7>.
(2)Test drive the vehicle.
(3)Verify that the condition described by the customer exists.

Q. Does a malfunction take place again?
Go to Step 4.
The inspection is complete.

STEP 4. Torque converter check
Check for damaged drive plate, incorrect installation in the input shaft (inserted at an angle), damaged splines or damper clutch sealing.

Q. Is the check result normal?
Go to Step 5.
If repair is possible, repair the damaged part. If repair is not possible because the splines on the drive plate or torque converter are damaged, replace it.

STEP 5. Valve body disassembly clean and assembly
(1)Check the bolts for looseness and the O-ring, solenoid valve and valve body for damage.
Replace the valve body assembly if the damages are thought to be irreparable.
(2)Test drive the vehicle.
(3)Verify that the condition described by the customer exists.

Q. Does a malfunction take place again?
The inspection is complete.
Replace the valve body assembly if the damages are thought to be irreparable.