2012 Acura TL BaseFACTORY OEM SERVICE PROCEDURE

Stall Speed Test

  1. Make sure the transmission fluid is filled to the proper level (see ATF LEVEL CHECK  ).
  2. Apply the parking brake, and block all four wheels.
  3. Connect the HDS to the DLC (A) located under the driver's side of the dashboard.
    Fig 1: Identifying Data Link Connector Location
    G08066430Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
  5. 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 ).
  6. Make sure the A/C switch is OFF.
  7. Start the engine, and warm it up to normal operating temperature (the radiator fan comes on).
  8. 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 pedal, while raising the engine speed.
  9. Allow 2 minutes for cooling between test, then repeat the test with the shift lever in S and R.
    NOTE:
    • Do not test stall speed for more than 10 seconds at a time.
    • Record the engine speed at 6 to 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, S, and R.
    • Do not test stall speed with A/T pressure gauges installed.

    Stall Speed RPM: 

    Specification: 2, 000 RPM 

    Service Limit: 1, 800- 2, 100 RPM 

  10. If any of the stall speeds are out of the service limit, refer to the problems and probable causes listed in the table below.
Problem Probable causes
Stall speed RPM high in D, S, and R
  • ATF pump output low
  • Main regulator valve stuck
  • Slipping clutch
Stall speed RPM high in R Slippage of 4th clutch
Stall speed RPM low in D, S, and R
  • Engine output low
  • Engine throttle valve closed
  • Torque converter one-way clutch slipping
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.