Honda Accord 2008 Manual page 863

07/11/02 08:45:53 61TA0000_140_0020
Automatic Transmission
Symptom Troubleshooting Index (cont'd)
Symptom
Engine idle
vibration
Vehicle moves in N
14-18
Probable Cause(s)
1. Low ATF level
2. Shift solenoid valve E
defective
3. Drive plate defective or
transmission
misassembled
4. Engine output low
5. Torque converter clutch
piston defective
6. ATF pump worn or binding
7. Lock-up shift valve
defective
1. Excessive ATF
2. Foreign material in
separator plate orifice
3. Relief valve defective
4. 1st clutch defective
5. 2nd clutch defective
6. 3rd clutch defective
7. 4th clutch defective
8. 5th clutch defective
9. Clearance between the
clutch end-plate and the top
disc incorrect
10. Needle bearing seized,
worn, or damaged
11. Thrust washer seized, worn,
or damaged
Notes
• Check the ATF level, and check the ATF cooler lines
for leakage and loose connections. If necessary, clean
the ATF cooler lines.
• Improper alignment of ATF pump and torque
converter housing may cause ATF pump seizure. The
symptoms are mostly an rpm-related ticking noise or
a high pitched squeak.
• Inspect the ATF strainer for clogging with particles of
steel or aluminum. If the ATF strainer is clogged,
replace it, and clean the torque converter, cooler, and
lines.
• Check for a stored DTC, and check for loose
connectors.
• Inspect shift solenoid valve E for seizure, and the
O-rings for wear and damage.
• Check for a misinstalled/damaged drive plate.
• Check that the idle rpm in gear is the specified idle
speed (see page 11-342). If the idle speed is correct,
adjust the engine and the transmission mounts.
• Replace the torque converter.
• Check the ATF level, and drain the ATF if it is over-
filled.
• Check the 1st, 2nd, 3rd, 4th, and 5th clutch pressures.
• Check the ATF strainer for debris. If the ATF strainer
is clogged with particles of steel or aluminum,
inspect the ATF pump. If the ATF pump is OK, find the
damaged components that caused the debris. If no
cause for contamination is found, replace the torque
converter.
• Inspect the clutch piston, the clutch piston check
valve, and the O-rings. Check the spring retainer and
the retainer seal (1st, 2nd, and 3rd) for wear and
damage. Inspect the clearance between the clutch
end-plate and the top disc. If the clearance is out of
tolerance, inspect the clutch discs and the plates for
wear and damage. If the discs are worn or damaged,
replace them as a set. Inspect the clutch wave-plate
height. If the height is out of tolerance, replace the
wave-plate. If the discs and the plates are OK, adjust
the clearance with the clutch end-plate.
• Inspect the 1st clutch feed pipe. If the 1st clutch feed
pipe is scored, replace the end cover.
Inspect the 3rd clutch feed pipe. If the 3rd clutch feed
•
pipe is scored, replace it and the O-ring under the
feed pipe guide.
• Replace the secondary shaft if the bushing for the 1st
or the 3rd clutch feed pipe is loose or damaged.
• Inspect the 5th clutch feed pipe. If the 5th clutch feed
pipe is scored, replace it and the O-ring under the
feed pipe guide.
• Replace the mainshaft if the bushing for the 5th
clutch feed pipe is loose or damaged.