Stall Speed Test
- Make sure the transmission fluid is filled to the proper level (see ATF LEVEL CHECK ).
- Apply the parking brake, and block all four wheels.
- Connect the HDS to the DLC (A) located under the driver's side of the dashboard.
- Turn the ignition switch to ON (II).
- Make sure the HDS communicates with the PCM, and go to the A/T Data List. If the does not, go to the DLC circuit troubleshooting (see DLC CIRCUIT TROUBLESHOOTING ).
- Make sure the A/C switch OFF.
- After the engine has warmed up to normal operating temperature (the radiator fan comes on).
- Shift to D while pressing the brake pedal firmly, then press the accelerator pedal for 6 to 8 seconds, and note the engine speed. Do not move the shift lever or remove your foot off the brake, while raising the engine speed.
- Allow 2 minutes for cooling between test, then repeat the test with the shift lever in L and R.NOTE:
- Do not test stall speed for more than 10 seconds at a time.
- Record the engine speed at 6-8 seconds after pressing the accelerator pedal. Higher engine speed will be indicated for 5 seconds.
- Stall speed test result should be used for diagnostic purposes only.
- The stall speed should be the same in D, L, and R.
- Do not test stall speed with the A/T oil pressure gauges installed.
Stall Speed rpm
Specification: 1, 850 rpm
Service Limit: 1, 700-2, 000 rpm
- If any of the stall speeds are out of the service limit, refer to the problems and probable causes listed in the table.PROBLEMS AND PROBABLE CAUSES REFERENCE
Problem Probable causes Stall speed rpm high in D, L, and R - ATF pump output low
- Clogged ATF strainer
- Regulator valve stuck
- Slipping clutch
Stall speed rpm high in L - Slippage of 1st clutch
- Slippage of 1st gear one-way clutch
- Slippage of 2nd clutch
Stall speed rpm high in R Slippage of 5th clutch Stall speed rpm low in D, L, and R - Engine output low
- Engine throttle valve closed
- Torque converter one-way clutch slipping