TORQUE CONVERTER STALL TEST
This test measures the maximum engine speed when the selector lever is in the D or R position. The torque converter stalls to test the operation of the torque converter, starter motor, one-way clutch operation, the holding performance of the clutches, and brakes in the transaxle.
| CAUTION | Do not let anybody stand in front of or behind the vehicle while this test is being carried out. |
- Check the automatic transaxle fluid level and temperature, and the engine coolant temperature. Fluid level : At the HOT mark on the oil level gauge Fluid temperature : 80~100°C Engine coolant temperature : 80~100°C
- Chock both rear wheels (left and right).
- Apply the parking brake lever with the brake pedal fully depressed.
- Start the engine.
- Move the selector lever to the D position, fully depress the accelerator pedal and take a reading of the maximum engine speed at this time.
| CAUTION | The throttle should not be left fully open for more than eight seconds. If carrying out the stall test two or more times, move the selector lever to the N position and run the engine at 1,000 RPM to let the automatic transaxle fluid cool down before carrying out subsequent tests. Standard value stall speed : 2,100 ~ 2,900 RPM Move the selector lever to the R position and carry out the same test again. |
Standard value stall speed : 2,100 ~ 2,900 RPM
TORQUE CONVERTER STALL TEST JUDGEMENT RESULTS
- Stall speed is too high in both D and R ranges Low line pressure Low & reverse brake slippage
- Stall speed is too high in D range only Underdrive clutch slippage
- Stall speed is too high in R range only Reverse clutch slippage
- Stall speed too low in both D and R ranges Malfunction of torque converter Insufficient engine output
