AUTOMATIC TRANSMISSION ± Troubleshooting <A/T>
23-23
INSPECTION PROCEDURE 11
Slippage (vibration)
Probable cause
Occurs when a clutch or brake does not fully engage due to low hydraulic pressure
or a worn facing. Appears as vibration when the problem is slight.
D Malfunction of torque converter
D Malfunction of direct clutch
D Malfunction of forward clutch
D Malfunction of one-way clutch No. 1, No. 2
D Malfunction of overdrive brake
D Malfunction of brake No. 1, No. 2, No. 3
D Malfunction of overdrive one-way clutch
D Malfunction of A/T-ECU
L: Refer to the Transmission Workshop Manual.
Does slippage occur both when moving
forward and reversing?
Yes
Check the torque converter.
NG
Replace the torque converter. L
No
OK
Check the overdrive clutch system. L
Check the overdrive one-way clutch
system. L
Does slippage occur in R range?
Yes
Check slippage in 3rd gear in D range.
NG
Check the direct clutch system.
L
No
OK
Check the brake No. 3 system. L
Does slippage occur in 1st gear?
Yes
Check for slippage in L range.
NG
Check the forward clutch system.
L
No
OK
Check the one-way clutch No. 2 sys-
tem. L
Does slippage occur in 2nd gear?
Yes
Check for slippage in 2nd gear in 2
range.
NG
Check the brake No. 2 system.
L
No
OK
Check the brake No. 2 system. L
Check one-way clutch No. 1. L
Does slippage occur in 3rd gear?
Yes
Check the direct clutch system. L
No
Check the overdrive brake system. L
Check the trouble symptoms.
NG
Replace the A/T-ECU.
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