Specifications

AUTOMATIC TRANSMISSION -
Troubleshooting
23-30
INSPECTION PROCEDURE 6
Engine stalling when shifting
Probable cause
If the engine stalls when the selector lever is shifted from N to D or R range while
the engine is idling, the cause is probably a malfunction of the engine system, damper
clutch solenoid valve, valve body or torque converter (damper clutch malfunction).
D Malfunction of the engine system
D Malfunction of the damper clutch control solenoid valve
D Malfunction of the valve body
D Malfunction of the torque converter (Malfuction of the
damper clutch)
L
: Refer to the Transmission Workshop Manual.
Engine system check
D Check the control system, ignition system, fuel system and
main system.
NG
Repair, replace
OK
Replace the damper clutch control solenoid valve.
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.
NG
Repalce the torque converter.
INSPECTION PROCEDURE 7
Shocks when changing from N to D and large time lag
Probable cause
If abnormal shocks or a time lag of 2 seconds or more occur when the selector
lever is shifted from N to D range while the engine is idling, the cause is probably
abnormal underdrive clutch pressure or a malfunction of the underdrive clutch, valve
body or idle position switch.
D Abnormal underdrive clutch pressure
D Malfunction of the underdrive solenoid valve
D Malfunction of the underdrive clutch
D Malfunction of the valve body
D Malfunction of the idle position switch
L
: Refer to the Transmission Workshop Manual.
MUT-
II
Actuator test
D No. 2 Underdrive solenoid valve
OK:
Sound of operation can be heard.
NG
Replace the underdrive solenoid valve. L
OK
When does the shock occur?
When starting
Shocks sometimes occur
No Yes
MUT-
II
Data list
D No. 64 Idle position switch
OK:
Turns from on to off when the accelerator pedal is slightly
depressed from the fully closed position.
OK NG
Idle position switch check
D INSPECTION PROCEDURE 18 - Idle position switch system
check (Refer to P.23-37.)
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.
When shifting
Hydraulic pressure test (Refer to P.23-56.)
D Measure the underdrive clutch pressure when shifting from
NtoD.
Standard value:
Refer to P.23-57.
NG
OK
Underdrive clutch system check L
D Remove the transmission assembly, valve body cover and valve
body.
D Pistons should operate and pressure should be maintained
when air is blown through the underdrive clutch oil hole in the
transmission case.
OK
NG
Underdrive clutch check L
D Check for burning of the facing, defective piston seal rings
and interference at the retainer.