A/T Stall Speed Test

A/T Stall Speed Test

1. Make sure the transmission fluid is filled to the proper level ATF Level Check.

2. Apply the parking brake, and block all four wheels.

3. Connect the HDS to the DLC (A).





4. Turn the ignition switch to ON (II). Make sure the HDS communicates with the PCM, and go to the A/T Data List. If it does not, go to the DLC circuit troubleshooting Testing and Inspection.

5. Make sure the A/C switch OFF.

6. After the engine has warmed up to normal operating temperature (the radiator fan comes on), shift to the 2.

7. Firmly press and hold the brake pedal, then fully press the accelerator pedal for 6 to 8 seconds, and note engine speed. Do not move the shift lever while raising engine speed.

8. Allow 2 minutes for cooling, then repeat the test in D, 1, and R.

NOTE:

- Record the engine speed at 6-8 seconds after pressing the accelerator pedal. High engine speed will be indicated for 5 seconds.
- Do not test stall speed for more than 10 seconds at a time.
- Stall speed tests should be used for diagnostic purposes only.
- Stall speed tests result should be the same in D, 2, 1, and R.
- Do not test stall speed with the A/T pressure gauges installed.





9. If any of the stall speeds are out of the service limit, refer to the problems and probable causes are listed in the table.