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).
- 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 (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.
- Firmly press the brake pedal, then fully press the accelerator pedal for 6 to 8 seconds, and note the engine speed. Do not move the shift lever while raising the engine speed.
- Allow 2 minutes for cooling, then repeat the test in R.NOTE:
- Do not test the 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 tests should be used for diagnostic purposes only.
- The stall speed should be the same in D and R.
- Do not test stall speed with the A/T pressure gauges installed.
Stall Speed RPM
Specification: 2, 300 RPM
Service Limit: 2, 100-2, 500 RPM
- If any of the stall speeds are out of the service limit, refer to the problems and probable causes listed in the table.
Problem Probable causes Stall speed RPM high in D and R - ATF pump output low
- Regulator valve stuck
- Slipping clutch
Stall speed RPM high in R Slippage of 5th clutch Stall speed RPM low in D and R - Engine output low
- Engine throttle valve closed
- Torque converter one-way clutch slipping