Engine Idle Vibration

Engine idle vibration

Diagnostic Procedure:

1. Low ATF level

2. Shift solenoid valve D defective

3. Drive plate defective or transmission misassembled

4. Engine output low

5. Torque converter clutch piston defective

6. ATF pump worn or damaged

7. Lock-up shift valve defective

8. Misassembled engine or transmission mount

Also check for:

- Check the ATF level and check the ATF lines for leaks and loose connections. If necessary, clean the ATF lines.
- Check for a stored DTC, and check for loose connections.
- Test the shift solenoid valve function with the HDS.
- Inspect the O-rings, and check the shift solenoid valve for seizure.
- Check for a misinstalled/damaged drive plate, replace the drive plate if it is worn or damaged.
- Check the engine control system.
- Replace the torque converter assembly.
- Check the line pressure.
- Improper alignment of ATF pump and torque converter housing may cause the ATF pump to seize. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak.
- Check the lock-up shift valve in the regulator valve body for free movement, and check the valve spring for wear and damage.
- Adjust the transmission and engine mounts.