Mechanical System Tests
MECHANICAL SYSTEM TESTSa. Measure the stall speed.
The object of this test is to check the overall performance of the transaxle and engine by measuring the stall speed in the D position.
NOTE:
- Conduct the test at the normal operating temperature of the ATF: 50 - 80 °C (122 - 176 °F).
- Do not continuously run this test for more than 5 seconds.
- To ensure safety, conduct this test in a wide, clear and level area which provides good traction.
- The stall test should always be carried out in pairs. One technician should observe the conditions of the wheels or the wheel stoppers outside the vehicle while the other is conducting the test.
1. Check the 4 wheels.
2. Connect the OBD II scan tool or the hand-held tester to the DLC3.
3. Fully apply the parking brake.
4. Keep your left foot press firmly the brake pedal.
5. Start the engine.
6. Shift into the D position. Press all the way down the accelerator pedal with your right foot. Quickly read the stall speed at this time.
Stall speed: 2,350 - 2,800 rpm
Evaluation
b. Measure the time lag.
When the shift lever is shifted while the engine is idling, there will be a certain lapse of time or time lag before the shock can be felt. This is used for checking the conditions of the 0/D direct clutch, the forward clutch, the 1st and the reverse brake.
NOTE:
- Conduct the test at normal operating temperature of the ATF: 50 - 80 °C (122 - 176 °F).
- Be sure to allow 1 minute interval between the tests.
- Take 3 measurements and take the average value.
1. Connect the OBD II scan tool or the hand-held tester to the DLC3.
2. Fully apply the parking brake.
3. Start the engine and check the idle speed.
Idle speed: 700 ± 50 rpm (In the N position and the air conditioner is OFF)
4. Shift the shift lever from the N to D position. Using a stop watch, measure the time from the lever is shifted until the shock is felt.
Time lag at N -> D: Less than 1.2 seconds
5. In the same manner, measure the time lag at N -> R.
Time lag at N -> R: Less than 1.5 seconds
Evaluation (If the time lag at N -> D or N -> R is longer than the specified).