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The purpose of this test is to measure the maximum engine speed when the torque converter stalls in D or R ranges in order to check the torque converter (Stator and one-way clutch operation) and the holding performance of the clutches and brakes which are built into the transmission.
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1.
warning |
For safety, the front and rear of the vehicle should be kept clear of other people while this test is being carried out.
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Check the A/T fluid level, the A/T fluid temperature and the engine coolant temperature.
- A/T fluid level: HOT position on oil level gauge
- A/T fluid temperature: 70 -
80°C
- Engine coolant temperature: 80 -
100°C
note |
The A/T fluid temperature is measured with M.U.T.-III.
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2.Place wheel locks on both the left and right front wheels.
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3.Pull the parking brake lever to apply the parking brake and depress the brake pedal fully.
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5.
caution |
- Do not keep the throttle fully open for any longer than 5 seconds.
- If you repeat the stall test when the A/T fluid temperature is greater than 80°C, move the selector lever to the "N" position and let the engine run at approximately 1,000 r/min for at least one minute. Wait until the A/T fluid temperature returns to 80°C or less.
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Move the selector lever to the D position, fully depress the accelerator pedal and quickly take a reading of the maximum engine speed at this time. Standard stalling engine speed: 2, 200 -
2, 700 r/min
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6.Move the selector lever to the R position and repeat the test described above. Standard stalling engine speed: 2, 200 -
2, 700 r/min
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- Stall speed is too high in both D and R ranges
- Malfunction of the torque converter (Slippage on the splines of the torque converter and the input shaft)
- Low line pressure
- Low-reverse brake slippage and malfunction of the one-way clutch
- Stall speed is too high in D range only
- Underdrive clutch slippage
- Stall speed is too high in R range only
- Stall speed is too low in both D and R ranges
- Malfunction of the torque converter (Slippage of the one-way clutch)
- Low line pressure
- Poor engine output
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