System Pressure And Stall Speed, Check

Line pressure/stall speed, checking

Special tools:
999 2531 MANOMETER 999 2531 Manometer
999 5074 NIPPLE 999 5074 NIPPLE

Note! As the illustrations in this service information are used for different model years and / or models, some variation may occur. However, the essential information is always correct.

Checking the oil level
Check the oil level. Checking Oil Level

Ignition off.

Removing the air cleaner (ACL) housing
Remove the air cleaner housing. Service and Repair

Connecting the manometer
Connect the hose and manometer 999 2531 MANOMETER 999 2531 Manometer to the transaxle (position D)
Install the air cleaner (ACL) housing, including all hoses and electrical terminals.

Checking the engine idling speed
Start the engine. Allow it to idle in neutral.
Check the idling speed. [1][2]Automatic Transmission/Transaxle

Checking the line pressure
Depress the brake pedal.
Move the gear selector to position D and read off the line pressure. [1][2]Automatic Transmission/Transaxle

Checking the stall speed
Check the stall speed when checking the line pressure.
The stall speed test gives an indication of the condition of the torque converter, the transmission clutches and the engine.

For the test to be accurate the following conditions must be met:
- the engine must be properly tuned
- the line pressure must be correct
- the oil level in the transmission must be correct and the transmission must be at operating temperature.

Note! Never conduct a stall speed check when the line pressure is too low.

Check
Air conditioning (AC) must be off.
Chock all four wheels
Start the engine.

Caution! Apply the parking brake. Press down hard on the brake pedal using your left foot during the test.

Note! Do not test the stall speed for longer than 5 seconds.




Move the gear selector to position D.
Depress the accelerator pedal all the way, max 5 seconds.
Read off the speed (rpm) as well line pressure. [1][2]Automatic Transmission/Transaxle
If the engine speed (rpm) exceeds the value in the table, see High stalling speed. If the engine speed (rpm) is less than the value in the table, see Low stalling speed.




Transfer the manometer to the socket for checking in position R.
Move the gear selector to position R.
Depress the accelerator pedal all the way, max 5 seconds.
Read off the speed (rpm) as well line pressure. [1][2]Automatic Transmission/Transaxle
If the engine speed (rpm) exceeds the value in the table, see High stalling speed. If the engine speed (rpm) is less than the value in the table, see Low stalling speed.

High stalling speed
The test conditions described above, have been met. Is the acceleration time from 0-100 km/h normal?

If the stalling speed recorded exceeds the normal value by more than 300 rpm:
Check if the oil is discolored or smells burnt. See Oil grade, checking. Oil Grade, Checking
If the oil is OK, replace the torque converter.
See and.
Dirty oil indicates worn or burnt clutch plates. Replace the transmission.
Transmission
Check the stall speed again after replacing the transmission.

Low stalling speed
The test conditions described above have been met.
Try a new torque converter if the stall speed recorded is below the normal value by more than 300 rpm.

Check the stalling speed again after replacing the torque converter
Replace the transmission if the fault persists. Transmission

After the check is completed:
Ignition off.
Remove both the manometer connection and the manometer.

Install:
- the test plug. Check that the O-ring is undamaged. Replace if necessary. Tighten.
- the bracket for the side member
- the holder for the connectors on the bracket
- the cover for the bracket.