A/T Stall Speed Test
  1. Apply the parking brake, and block all four wheels.
  1. Connect the HDS to the DLC (A) located under the driver's side of the dashboard, and go to the A/T Data list.
  1. Turn the ignition switch to ON (II). Make sure the HDS communicates with the PCM. If it does not, go to the DLC circuit troubleshooting; R20A3 engine model, K24Z3 engine model.
  1. Make sure the A/C switch is OFF.
  1. After the engine has warmed up to normal operating temperature (the radiator fan comes on), shift the shift lever in D.
  1. Firmly press the brake pedal, then press the accelerator pedal for 6 to 8 seconds, and note the engine speed. Do not move the shift lever while raising engine speed.
  1. Allow 2 minutes for cooling, then repeat the test in D and R.
    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 tests should be the same in D and R.
    • Do not test stall speed with the A/T oil pressure gauges installed.
    Stall Speed rpm
    R20A3 Engine Model:
    Specification:
    2,150 rpm (min −1 )
    Service Limit:
    2,000−2,300 rpm (min −1 )
    K24Z3 Engine Model:
    Specification:
    2,100 rpm (min −1 )
    Service Limit:
    1,950−2,250 rpm (min −1 )


  1. If the stall speeds are out of the service limit, problems and probable causes are listed in the table.
    Problem
    Probable Causes
    Stall speed rpm high in D and R
    • ATF pump output low
    • Clogged ATF strainer
    • Regulator valve stuck
    • Slipping clutch
    Stall speed rpm high in R
    Slippage 4th clutch
    Stall speed rpm low in D and R
    • Engine output low
    • Engine throttle valve closed
    • Torque converter one-way clutch slipping