Mechanical System Tests

MECHANICAL SYSTEM TESTS

a. Measure the stall speed.
The object of this test is to check the overall performance of the transaxle and engine by measuring the stall speeds in the D and R positions.

NOTE:
- Do the test at the normal operating fluid temperature of 50 - 80 °C (122 - 176 °F).
- Do not continuously run this test longer than 5 seconds.
- To ensure safety, conduct this test in a wide, clear and level area which provide good traction.
- The stall test should always be carried out in pairs. One technician should observe the conditions of wheels or wheel stoppers outside the vehicle while the other is doing the test.

1. Check the 4 wheels.
2. Fully apply the parking brake.
3. Keep your left foot pressed firmly on the brake pedal.
4. Start the engine.
5. Shift into the D position. Press all the way down on the accelerator pedal with your right foot. Quickly read the stall speed at this time.

Stall speed:
2AZ-FE: 2,350 ± 150 rpm
1MZ-FE: 2,650 ± 150 rpm




Evaluation

b. Measure the time lag.
When the shift lever is shifted while the engine is idling, there will be a certain time lapse or lag before the shock can be felt. This is used for checking the conditions of the O/D direct clutch, forward clutch, and 1st and reverse brake.

NOTE:
- Do the test at the normal operating fluid temperature of 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. Fully apply the parking brake.
2. Start the engine and check idle speed.

Idle speed: 700 ± 50 rpm (In N position and A/C OFF)

3. Shift the shift lever from the N to D position. Using a stop watch, measure the time from when the lever is shifted until the shock is felt.

Measure the time lag of N -> R in the same way.

Time lag:
N -> D Less than 1.2 seconds
N -> R Less than 1.5 seconds




Evaluation (If N -> D time or N -> R time lag is longer than specified)