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Home >> Mazda >> 2016 >> MX-5 Miata Club, Automatic Trans >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle System (Service Information) >> Mechanical System Test >> Stall Speed Test

Stall Speed Test

  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
ENGINE STALL SPEED SPECIFICATION

Measurement conditions Specification (rpm)
D, R, M 2, 546-2, 846