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This test measures the maximum engine speed at the time the torque converter stalls with the selector lever in the D or R position. With this test, the holding abilities of the clutch and brake that are incorporated in the transmission can be checked.
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1.Check the CVT fluid level, CVT fluid temperature, and engine coolant temperature.
- CVT fluid level: In the "HOT" range on the oil level gauge
- CVT fluid temperature: 70 to 80°C
- Engine coolant temperature: 80 to 100°C
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Use M.U.T.-III. to measure the CVT fluid temperature.
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3.Pull the parking brake lever, and then fully depress the brake pedal.
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5.
caution |
- Do not maintain the WOT condition for 5 seconds or longer.
- When continuing the stall test, make sure that the fluid temperature does not exceed 80°C. If the CVT fluid temperature exceeds 80°C, run the engine at around 1,000 r/min for 1 minute or longer to lower the CVT fluid temperature to 80°C or less.
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Move the selector lever to the D range and fully depress the accelerator pedal. Quickly read the maximum engine speed at this time. Standard value - Stall speed: 2,400 - 2,900 r/min
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6.Move the selector lever to the R range, and then repeat the previous step. Standard value - Stall speed: 2,400 - 2,900 r/min
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- Stall speed is high when selector lever is in both D and R ranges.
- Malfunction of the torque converter (Torque converter and input shaft spline are slipping)
- Malfunction of the valve body
- Damaged wiring harness and connectors
- Malfunction of CVT-ECU
Stall speed is high only when selector lever is in the D ranges.
- Forward clutch is slipping
Stall speed is high only when the selector lever is in the R ranges.
- Reverse brake is slipping
Stall speed is low when selector lever is in both D and R ranges.
- Malfunction of the torque converter
- Line pressure is low.
- Low engine power
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