Specifications

AUTOMATIC TRANSMISSION -
Troubleshooting
23-35
INSPECTION PROCEDURE 14
Poor acceleration
Probable cause
If acceleration is poor even if downshifting occurs while driving, the cause is probably
a malfunction of the engine system or of a brake or clutch.
D Malfunction of the engine system
D Malfunction of the brake or clutch
L
: Refer to the Transmission Workshop Manual.
Engine system check
D Check the control system, ignition system, fuel system and
main system.
NG
Replace, repair
OK
Brake or clutch check L
D Check for burning of the facing, defective piston seal rings
and interference at the retainer.
INSPECTION PROCEDURE 15
Vibration
Probable cause
If vibration occurs when driving at constant speed or when accelerating and deceleration
in top range, the cause is probably abnormal damper clutch pressure or a malfunction
of the engine system, damper clutch control solenoid valve, torque converter or valve
body.
D Abnormal damper clutch pressure
D Malfunction of the engine system
D Malfunction of the damper clutch control solenoid valve
D Malfunction of the torque converter
D Malfunction of the valve body
L
: Refer to the Transmission Workshop Manual.
MUT-
II
Actuator test
D No. 6 Damper clutch control solenoid valve
OK:
Sound of operation can be heard.
NG
Replace the damper clutch control solenoid valve. L
OK
Does the problem occur even when the oil temperature sensor
connector is disconnected?
Yes
Engine system check
D Check the control system, ignition system, fuel system and
main system.
No
Hydraulic pressure test (Refer to P.23-56.)
D Measure the damper clutch pressure.
Standard value:
Refer to P.23-57.
NG
Valve body disassembly, cleaning and reassembly L
D Pay particular attention to loosening of bolts, and to damage
and slippage of O-rings, valves and valve bodies.
D If the damage cannot be repaired, replace the valve body
assembly.
OK
Replace the torque converter assembly.