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
- Malfunction of damper clutch solenoid valve
- Malfunction of engine system
- Abnormal torque converter pressure
- Malfunction of valve body
- Malfunction of torque converter
- Malfunction of the A/T-ECU <4M4>
- Malfunction of the engine-A/T-ECU <6G7>
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STEP 1. Check when the vibration occurs.
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Q.
Does the vibration occur when the damper clutch is operating?
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Go to Step 3.
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Go to Step 2.
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STEP 2. Engine system check
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Q.
Is the check result normal?
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The inspection is complete.
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Repair the engine system.
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STEP 3. A/T-ECU <4M4> or engine-A/T-ECU <6G7> replacement
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(1)Replace the A/T-ECU <4M4> or engine-A/T-ECU <6G7>.
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(2)Test drive the vehicle.
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(3)Verify that the condition described by the customer exists.
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Q.
Does a malfunction take place again?
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Go to Step 4.
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The inspection is complete.
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STEP 4. Torque converter check
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Check for damaged drive plate, incorrect installation in the input shaft (inserted at an angle), damaged splines or damper clutch sealing.
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Q.
Is the check result normal?
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Go to Step 5.
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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.
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STEP 5. Valve body disassembly clean and assembly
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(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.
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(2)Test drive the vehicle.
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(3)Verify that the condition described by the customer exists.
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Q.
Does a malfunction take place again?
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The inspection is complete.
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Replace the valve body assembly if the damages are thought to be irreparable.
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