On Vehicle Inspection
MECHANICAL SYSTEM TESTMechanical System Test Preparation
1. Check and correct the engine coolant, engine oil, and ATF levels as necessary before testing.
2. Warm up the engine thoroughly to raise the ATF temperature to operating level (60 - 70°C (140 - 158°F)).
3. Engage the parking brake and use wheel chocks at the front and rear of the wheels.
4. Connect a tachometer to the engine.
Line Pressure Test
Line Pressure Test Procedure
WARNING: Draining the ATF when it is hot is dangerous. Hot ATF can shoot out when the square-head plug is removed, causing burns and serious injury. Wait until the transaxle and ATF are cool before draining the ATF.
1. Connect the SSTs (49 H019 002, 49 B019 901, and 49 0378 400B) to the line pressure inspection port.
2. Shift the selector lever to D range and read the line pressure at idle.
3. Connect the SST (49 B019 902) to the line pressure inspection port.
CAUTION: If the accelerator pedal is pressed for longer than 5 seconds while the brake pedal is depressed, the transaxle could be damaged. Therefore, perform both steps 4 and 5 within 5 seconds.
4. Firmly depress the brake pedal with the left foot, and then gradually depress the accelerator pedal with the right.
5. When the engine speed no longer increases, quickly read the line pressure and release the accelerator.
6. Shift the selector to N position and let the engine idle for 1 minute or more to cool the ATF.
7. Read the line pressure at idle and at the engine stall speed for the remaining ranges in the same manner.
(1) 2 range
(2) 1 range
(3) R position
8. Shift the selector lever to D range.
9. Read the line pressure at idle and at the engine stall speed in the same manner.
10. Install a new square-head plug in the line pressure inspection port.
Tightening Torque 5.0 - 9.8 Nm (50 - 100 kgf-cm, 44 - 86 inch lbs.)
Evaluation Of Line Pressure Test
Stall Test
Stall Test Procedure
1. Shift the selector lever to D range.
CAUTION: If the accelerator pedal is depressed for longer than 5 seconds while the brake pedal is depressed, the transaxle could be damaged. Therefore, perform both steps 2 and 3 within 5 seconds.
2. Firmly depress the brake pedal with the left foot, and then gradually depress the accelerator pedal with the right.
3. When the engine speed no longer increases, quickly read the engine speed and release the accelerator.
4. Shift the selector to N position and let the engine idle for I minute or more to cool the ATF.
5. Perform stall tests for the remaining ranges and position in the same manner.
(1) 2 range
(2) 1 range
(3) R position
Engine stall speed:
Z5: 1,950 - 2,250 rpm
BP: 2,400 - 2,700 rpm
Evaluation Of Stall Test
Time Lag Test
Time Lag Test Procedure
1. Shift the selector from N position to D range.
2. Use a stopwatch to measure the time it takes from shifting until shock is felt.
3. Shift the selector [ever to N position and run the engine at idle speed for at least 1 minute.
4. Do the time lag test for the following shifts in the same manner. Make three measurements for each test and average the results.
5. While depressing the brake pedal, perform the test for the following shifts in the same manner.
(1) N position->4D range
(2) N position->2 range
(3) N position->R position
Time lag
N position->D range: approximately 0.5 - 0.6 seconds
N position->2 range: approximately 0.5 - 0.7 seconds
N position->R position: approximately 0.6 - 0.7 seconds
Evaluation Of Time Lag Test