U340E AUTOMATIC TRANSMISSION / TRANSAXLE AUTOMATIC TRANSAXLE SYSTEM MECHANICAL SYSTEM TESTS
STALL SPEED TEST
- HINT:
-
This test is to check the overall performance of the engine and transaxle.
- CAUTION:
- ·
This test should be done on a paved surface (a surface that is not slippery).
·To ensure safety, perform this test in an open and level area that provides good traction.
·The stall speed test should always be performed with at least 2 people. One person should observe the condition of the wheels and wheel chocks while the other is performing the test.
- NOTICE:
- ·
Do not perform the stall speed test for longer than 5 seconds.
·When performing the stall speed test repeatedly, wait for 15 seconds or more between tests.
·Perform this test with the ATF (Automatic Transmission Fluid) at the normal operating temperature: 50 to 80°C (122 to 176°F)
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Data List.
- Powertrain > Engine and ECT > Data List
-
Tester Display Engine Speed A/T Oil Temperature 1 - 50003 234 9,406
Drive the vehicle until the transmission fluid temperature has reached 50 to 80°C (122 to 176°F).
Allow the engine to idle with the air conditioning and headlights off.
Chock all 4 wheels.
Set the parking brake and keep the brake pedal depressed firmly with your left foot.
Move the shift lever to D.
Depress the accelerator pedal as much as possible with your right foot.
Read the engine speed (stall speed) and release the accelerator pedal immediately.
- Standard Value:
Stall Speed 2220 rpm + 300 rpm - 300 rpm
| Test Result | Possible Cause |
|---|---|
| Stall speed is lower than standard value | ·
Engine power output may be insufficient ·
Stator one-way clutch is not operating properly
|
| Stall speed is higher than standard value | ·
Line pressure is too low ·
Forward clutch slipping ·
No. 2 one-way clutch is not operating properly ·
Improper fluid level |
SHIFT TIME LAG TEST
- HINT:
-
When the shift lever is moved while the engine is idling, there will be a certain time lapse or lag before shock can be felt. This is used for checking the condition of the clutch and brake.
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Data List.
- Powertrain > Engine and ECT > Data List
-
Tester Display A/T Oil Temperature 1 - 50003 234 406
Drive the vehicle until the transmission fluid temperature has reached 50 to 80°C (122 to 176°F).
Allow the engine to idle with the air conditioning OFF.
Set the parking brake and keep the brake pedal depressed firmly.
Check the D position time lag.
Move the shift lever to N and wait for 1 minute.
Move the shift lever to D and measure the time until shock is felt.
Repeat the 2 steps above 3 times, and calculate the average time of the 3 tests.
Check the R position time lag.
Move the shift lever to N and wait for 1 minute.
Move the shift lever to R and measure the time until shock is felt.
Repeat the 2 steps above 3 times, and calculate the average time of the 3 tests.
- Standard Value:
D position time lag is less than 1.2 seconds
R position time lag is less than 1.5 seconds
Evaluation (If N → D or N → R time lag is longer than the specified) Test Result Possible Cause D position time lag exceeds standard value ·Line pressure is too low
·Forward clutch is worn
·No. 2 one-way clutch is not operating properly
R position time lag exceeds standard value ·Line pressure is too low
·Reverse clutch is worn
·1st and reverse brake is worn