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Home >> Mazda >> 2022 >> MX-5 Miata RF Club >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Automatic Transaxle (Service Information)) >> Mechanical System Test >> Stall Speed Test >> Notes

Stall Speed Test: Notes

WARNING: This page is about a different variant/trim than selected.
  1. Perform mechanical system test preparation. (See MECHANICAL SYSTEM TEST PREPARATION .)
  2. Start the engine.
  3. Strongly depress the brake pedal with the left foot.
  4. Shift the selector lever to the D position.
    CAUTION:
    • To prevent damage to the transmission, measure the line pressure while stalling (Step 5-6) within 5 s.
  5. Slowly depress the accelerator pedal fully with the right foot all the way down.
  6. Read the engine speed quickly when the speed is stabilized, and remove the right foot from the accelerator pedal.
  7. Shift the selector lever to the N position and idle for 1 min or more.
  8. Measure the stall speed in the M (1st gear) and R positions using the same procedure.
    • If there is any malfunction, one of the following causes may have occurred:
      Condition Possible cause
      Lower in R, D, and M (1GR) position
      • Engine lack of power
      • Torque converter one-way clutch malfunction
      Higher in D and M (1GR) position
      • Insufficient line pressure
      • C1 clutch malfunction (slippage)
      • F3 one-way clutch malfunction
      Higher in R position
      • Insufficient line pressure
      • B4 brake malfunction (slippage)
      • C3 clutch malfunction (slippage)
      • F1 one-way clutch malfunction
      Higher in R, D, and M (1GR) position
      • Insufficient line pressure
      • Oil leakage from each position circuit
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