A/T Stall Speed Test

1. 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: The illustration shows LHD model; RHD model is symmetrical. 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. Fully press the brake pedal and accelerator pedal for 6 to 8 seconds, and note engine speed. Do not move the shift lever while raising engine speed. Allow 2 minutes for cooling, then repeat the test in the R 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 D and R positions. Do not test stall speed with the A/T pressure gauges installed.
   Stall Speed rpm
   K20A6 Engine model
   Specification: | 2,100 rpm (min −1 )
   Service Limit: | 1,950−2,250 rpm (min −1 )
   K24A3 Engine model
   Specification: | 2,000 rpm (min −1 )
   Service Limit: | 1,850−2,150 rpm (min −1 )
1. If the measurements are out of the service limit, problems and probable causes are listed in the table.
   Problem | Probable causes
   --- | ---
   Stall speed rpm high in the D and R positions | Low fluid level ATF pump output low Clogged ATF strainer Regulator valve stuck Slipping clutch
   Stall speed rpm high in the R position | Slippage 4th clutch
   Stall speed rpm low in the D and R positions | Engine output low Engine throttle valve closed Torque converter one-way clutch slipping