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 speeds in the D and R positions.
NOTE:
- Do the test at normal ATF operation temperature 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, level area which provides good condition.
- 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. Connect OBD II scan tool or the TOYOTA hand-held tester to DLC3.
4. Start the engine and check the idle speed.
5. Keep your left foot pressed firmly on the brake pedal.
6. Shift into the D position. Fully depress the accelerator pedal. Quickly read the stall speed at this time.
Stall speed: 2,500 ± 150 rpm
7. Do the same test in R position.
Stall speed: 2,500 ± 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 of lapse or lag before the shock can be felt. This is used for checking the condition of the O/D direct clutch, forward clutch, direct clutch, and 1st & reverse brake.
NOTE:
- Do the test at normal operating ATF temperature 50 - 80 °C (122 - 176 °F).
- Be sure to allow 1 minute interval between tests.
- Perform 3 measurements and take the average value from them.
1. Connect OBD II scan tool or the TOYOTA hand-held tester to DLC3
2. Fully apply the parking brake.
3. Start the engine and check idle speed.
Idle speed: 700 ± 50 rpm (In N position and A/C OFF)
4. Shift the lever from the N to D position. Using a stop watch, measure the time it takes from shifting the lever until the shock is felt.
Time lag: N -> D Less than 0.7 seconds
5. In the same manner, measure the time lag for N -> R.
Time lag: N -> R Less than 1.2 seconds
Evaluation (If N > D or N -> R time lag is longer than the specified):