AC60E AUTOMATIC TRANSMISSION / TRANSAXLE AUTOMATIC TRANSMISSION SYSTEM(for 7GR-FKS) MECHANICAL SYSTEM TESTS
STALL SPEED TEST
- CAUTION:
- ·
·Do not perform a stall test if there are any people or objects near the vehicle.
·The vehicle could begin moving suddenly, resulting in a serious accident.
- ·
·Do not perform a stall test if any wheel chocks are out of position.
·The vehicle could begin moving suddenly, resulting in a serious accident.
- ·
·Do not perform the stall test on a slippery or low-friction surface that could allow the tires to spin.
·The vehicle could begin moving suddenly, resulting in a serious accident.
- NOTICE:
- ·
Do not perform the stall speed test for more than 5 seconds.
·When performing the stall speed test more than once, make sure to wait 15 seconds or more between tests.
- HINT:
-
This test is to check the overall performance of the engine and transmission.
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Transmission / Data List.
- Powertrain > Transmission > Data List
-
Tester Display A/T Oil Temperature No.1 - 50003 373 180
Drive the vehicle until the transmission fluid temperature is between 50 and 80°C (122 and 176°F).
Allow the engine to idle with the air conditioning 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 2300 rpm + 200 rpm - 200 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 ·
Torque converter assembly is faulty (stall speed is less than standard value by 600 rpm or more) |
| Stall speed is higher than standard value | ·
Line pressure is too low ·
No. 1 clutch (C1) is slipping ·
No. 3 one-way clutch (F3) 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 the 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 / Transmission / Data List.
- Powertrain > Transmission > Data List
-
Tester Display A/T Oil Temperature No.1 - 50003 373 180
Drive the vehicle until the transmission fluid temperature is between 50 and 80°C (122 and 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 the 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
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 the shock is felt.
Repeat the 2 steps above 3 times, and calculate the average time of the 3 tests.
- Standard value:
R position time lag is less than 1.5 seconds
| Test Result | Possible Cause |
|---|---|
| D position time lag exceeds standard value | ·
Line pressure is too low ·
No. 1 clutch (C1) is worn ·
No. 3 one-way clutch (F3) is not operating properly |
| R position time lag exceeds standard value | ·
Line pressure is too low ·
No. 2 brake (B2) is worn ·
No. 3 brake (B3) is worn |