Mitsubishi Outlander (2003+). Manual - part 214
ON-VEHICLE SERVICE
AUTOMATIC TRANSMISSION (FF)
23A-151
TORQUE CONVERTER STALL TEST
M1231005400403
The purpose of this test is to measure the maximum
engine speed when the torque converter stalls in D
or R ranges in order to check the torque converter
(Stator and one-way clutch operation) and the
holding performance of the clutches and brakes
which are built into the transmission.
WARNING
For safety, the front and rear of the vehicle
should be kept clear of other people while
this test is being carried out.
1. Check the A/T fluid level, the A/T fluid
temperature and the engine coolant temperature.
•
A/T fluid level: HOT position on oil level gauge
•
A/T fluid temperature: 70
−
80
°
C
•
Engine coolant temperature: 80
−
100
°
C
NOTE: The A/T fluid temperature is measured
with MUT-II/III.
2. Place wheel locks on both the left and right front
wheels.
3. Pull the parking brake lever to apply the parking
brake and depress the brake pedal fully.
4. Start the engine.
CAUTION
•
Do not keep the throttle fully open for any
longer than 5 seconds.
•
If you repeat the stall test when the A/T fluid
temperature is greater than 80
°
C, move the
selector lever to the "N" position and let the
engine run at approximately 1,000 r/min for at
least one minute. Wait until the A/T fluid
temperature returns to 80
°
C or less.
5. Move the selector lever to the D position, fully
depress the accelerator pedal and quickly take a
reading of the maximum engine speed at this
time.
Standard stalling engine speed: 2, 300
−
2,
800 r/min
6. Move the selector lever to the R position and
repeat the test described above.
Standard stalling engine speed: 2, 300
−
2,
800 r/min
TORQUE CONVERTER STALL TEST
JUDGMENT RESULTS
1. Stall speed is too high in both D and R ranges
•
Malfunction of the torque converter (Slippage
on the splines of the torque converter and the
input shaft)
•
Low line pressure
•
Low-reverse brake slippage and malfunction
of the one-way clutch
2. Stall speed is too high in D range only
•
Underdrive clutch slippage
3. Stall speed is too high in R range only
•
Reverse clutch slippage
4. Stall speed is too low in both D and R ranges
•
Malfunction of the torque converter (Slippage
of the one-way clutch)
•
Low line pressure
•
Poor engine output
AC001824AC
Reverse
clutch
Low-reverse
brake
Underdrive
clutch
Torque
converter
Second brake
Overdrive
clutch
One-way
clutch