STALL SPEED TESTING

TRANSAXLE AUTOMATIC SYSTEM TO MECHANICAL TESTING SYSTEM

STALL SPEED TESTING

INSTRUCTIONS:
This test is to check the overall performance of the engine and transaxle by measuring the stall speeds in position D.

NOTE:
.Do not do the stall speed test longer than 5 seconds.
.To ensure safety, do this test in a wide area, which is bright enough to have a goodrunway.
.Testing stall speed should always be performed by more than one technician (in pairs). The technician should look at the wheels and wheel chock from outside the vehicle to make sure the wheels do not slip, during another technician perform this test.

a.Connect the intelligent tester to DLC3.
b.Run the vehicle until the temperature of ATF (Automatic Transmission Fluid)reaches 50 ° to 80 ° C (122 ° to 176 ° F).
c.Let the engine idle with the air conditioning OFF.
d.Wedge to 4 wheels.
e.Set the parking brake and keep stepping on the brake pedal firmly with your left foot.
f.Slide the shift lever to position D.
g.Acceleration pedal is stepped up to run out with your right foot.
h.Read the engine rpm (stall speed) and immediately release the accelerator pedal.

The default value: 1850 to 2450 rpm

Evaluation: Testing Results
.Stall speed is lower than the standard value
Possible Causes
.Stator one-way clutch does not work perfectly
.Torque converter failed (Stall speed is lower than the standard value by 600 rpm ormore)
.Engine power is not perfect

Evaluation: Testing Results
.Stall speed is higher than the standard value
Possible Causes
.Line pressure is too low
.Forward clutch (C1) skid
.One-way clutch (F2) No. 2 does not work perfectly