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), and go to the A/T data list.NOTE: If the HDS does not communicate with the PCM, troubleshoot the DLC circuit (see DLC CIRCUIT TROUBLESHOOTING ).
- Make sure the A/C switch is OFF.
- After the engine has warmed up to normal operating temperature (the radiator fan comes on), shift to the D position.
- Firmly press the brake pedal and 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 the position.NOTE:
- 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 should be the same in the D and R positions.
- Do not test stall speed with the A/T pressure gauges installed.
Stall Speed rpm:
Specification: 2,100 rpm
Service Limit: 1,950-2,250 rpm
- If the measurements are out of the service limit, the problems and probable causes are listed in the table.PROBLEM PROBABLE CAUSES CHART
Problem Probable causes Stall speed rpm high in the D and R positions - ATF pump output low
- Clogged ATF strainer
- Regulator valve stuck
- Slipping clutch
Stall speed rpm high in the R position Slippage of 5th clutch Stall speed rpm low in the D and R positions - Engine output low
- Engine throttle valve closed
- Torque converter one-way clutch slipping