PROBLEM SYMPTOM CONFIRMATION
Try to reproduce symptoms based on the result of the customer problem analysis. If the problem is that the transaxle does not change gear ratios or changes ratios at the wrong engine speed, conduct the following road test while referring to the speed variation chart and attempt to duplicate the problem symptoms.
ROAD TEST
CAUTION:
Strictly observe posted speed limits, traffic laws and road conditions when performing the road test.
Note
This test must be conducted after checking and confirming that the engine is operating normally.
Perform this test while the CVT fluid temperature is between 50 and 100°C (122 and 212°F).
Perform this test with the A/C off.
Tech Tips
Lock-up control will not operate when the CVT fluid temperature is 40°C (104°F) or less and the vehicle speed is 60 km/h (37 mph) or less, or when the CVT fluid temperature is 5°C (41°F) or less.
Lock-up control will not operate when the engine coolant temperature is 35°C (95°F) or less.
The lock-up OFF vehicle speed may vary depending on electrical load, and air conditioning and brake operation.
Keep a constant accelerator pedal angle to maintain the specified vehicle speed.
When fully depressing the accelerator pedal, read the engine speed immediately after the pedal is fully depressed.
| Shift Lever Position | Lock-up Condition (Accelerator Pedal Opening Angle) |
|
|---|---|---|
| Lock-up ON (10%) |
Lock-up OFF (0%) |
|
| D (NORMAL Mode on) |
15 to 30 km/h (9 to 19 mph) |
5 to 25 km/h (3 to 16 mph) |
| D (SPORT Mode on) |
10 to 25 km/h (6 to 16 mph) |
|
Tech Tips
Lock-up OFF by lock-up control can be confirmed when the lock-up ON conditions change to lock-up OFF conditions as shown in the following table.
The flex lock-up control condition cannot be checked by reading the Data List item "Lock up". Confirm the lock-up condition by checking the operation of the shift solenoid valve SC and shift solenoid valve SL.
| Lock-up ON Condition: | Lock-up OFF Condition: |
|---|---|
| Shift solenoid valve SC: OFF | Shift solenoid valve SC: ON |
| Shift solenoid valve SL: ON | Shift solenoid valve SL: ON (No change) |
D position test
Move the shift lever to D and check the following:
Check if the gear ratio changes during normal driving (average urban driving).
With the vehicle stopped, fully depress the accelerator pedal and check the engine speed at the shift timing listed in *1 and *2 in the speed variation chart.
With the vehicle stopped, depress the accelerator pedal to a constant intermediate position and check the engine speed when the vehicle reaches the vehicle speed listed in *3 in the speed variation chart.
Release the accelerator pedal and check the engine speed when the vehicle decelerates to the vehicle speed listed in *4 in the speed variation chart.
Depress the accelerator pedal to a constant intermediate position again and check the engine speed when the vehicle reaches the vehicle speed listed in *5 in the speed variation chart.
Fully depress the accelerator pedal and check the engine speed as the vehicle accelerates from the vehicle speed listed in *6 in the speed variation chart.
Check for abnormal noises and vibration.
Tech Tips
The check for the cause of abnormal noise and vibration must be done thoroughly as it could also be due to loss of balance in the differential, torque converter clutch, etc.
Check for abnormal shock and slippage at kick-down.
Check the lock-up mechanism.
M position test
Move the shift lever to M and check the following:
Check the shift operation.
When driving with M7 selected (vehicle speed approximately 90 to 100 km/h (56 to 62 mph)), check the engine braking effect in M6 when the shift lever is moved to "-".
When driving with M6 selected (vehicle speed approximately 70 to 80 km/h (43 to 50 mph)), check the engine braking effect in M5 when the shift lever is moved to "-".
When driving with M5 selected (vehicle speed approximately 50 to 60 km/h (31 to 37 mph)), check the engine braking effect in M4 when the shift lever is moved to "-".
When driving with M4 selected (vehicle speed approximately 40 to 50 km/h (25 to 31 mph)), check the engine braking effect in M3 when the shift lever is moved to "-".
When driving with M3 selected (vehicle speed approximately 30 to 40 km/h (19 to 25 mph)), check the engine braking effect in M2 when the shift lever is moved to "-".
When driving with M2 selected (vehicle speed approximately 20 to 30 km/h (12 to 19 mph)), check the engine braking effect in M1 when the shift lever is moved to "-".
R position test
Move the shift lever to R and lightly depress the accelerator pedal. Check that the vehicle moves backward without any abnormal noise or vibration.
P position test
Stop the vehicle on an incline (more than 5°). Then move the shift lever to P and release the parking brake. Check that the parking lock pawl holds the vehicle in place.