PROBLEM SYMPTOM CONFIRMATION
Based on the result of the customer problem analysis, try to reproduce the symptoms. If the problem is that the transaxle does not shift up or down, or that the shift point is too high or too low, conduct the following road test referring to the automatic shift schedule and attempt to duplicate the problem symptoms.
ROAD TEST
Note
Perform the test while the ATF temperature is 50 to 80°C (122 to 176°F).
D position test (normal and sport shift patterns):
Move the shift lever to D and fully depress the accelerator pedal. Check the following:
Check up-shift operation.
Check that the 1 to 2, 2 to 3, 3 to 4, 4 to 5 and 5 to 6 up-shifts take place, and that the shift points conform to the automatic shift schedule.
Tech Tips
6th and 5th Gear Up-shift Prohibition Control
ATF temperature is 0°C (32°F) or less.
Lock-up Prohibition Control
Brake pedal is depressed.
Accelerator pedal is released.
Engine coolant temperature is 20°C (68°F) or less.
Check for shift shock and slippage.
Check for shock and slippage at the 1 to 2, 2 to 3, 3 to 4, 4 to 5 and 5 to 6 up-shifts.
Check for abnormal noise and vibration.
Check for abnormal noise and vibration when up-shifting from 1 to 2, 2 to 3, 3 to 4, 4 to 5 and 5 to 6 while driving with the shift lever in D, and also while driving in lock-up.
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 kick-down operation.
Check vehicle speeds when the 2 to 1, 3 to 2, 4 to 3, 5 to 4, and 6 to 5 kick-downs take place while driving with the shift lever in D. Confirm that each speed is within the applicable vehicle speed range indicated in the automatic shift schedule.
Check for abnormal shock and slippage at kick-down.
Check the lock-up mechanism.
Drive the vehicle with the shift lever in D (2nd, 3rd, 4th, 5th or 6th gear) at a steady speed (lock-up ON).
Lightly depress the accelerator pedal and check that the engine speed does not change abruptly.
Tech Tips
There is no lock-up function in 1st gear.
If there is a jump in engine speed, this indicates that lock-up is not operating.
D position (fixed range mode) test:
Check shift paddle switch operation.
While driving in 5th gear with the D5 range selected (at a vehicle speed of approximately 55 to 65 km/h (34 to 40 mph)), operate the "-" shift paddle switch and check if the down-shift to 4th gear and proper engine braking occur.
While driving in 4th gear with the D4 range selected (at a vehicle speed of approximately 30 to 40 km/h (19 to 25 mph)), operate the "-" shift paddle switch and check if the down-shift to 3rd gear and proper engine braking occur.
While driving in 3rd gear with the D3 range selected (at a vehicle speed of approximately 20 to 30 km/h (12 to 19 mph)), operate the "-" shift paddle switch and check if the down-shift to 2nd gear and proper engine braking occur.
While driving in 2nd gear with the D2 range selected (at a vehicle speed of approximately 10 to 20 km/h (6 to 12 mph)), operate the "-" shift paddle switch and check if the down-shift to 1st gear and proper engine braking occur.
Tech Tips
When the vehicle is being driven with the shift lever in D (fixed range mode), if the vehicle is stopped or the accelerator pedal is kept steady for a certain period of time with the transaxle in the same gear, the vehicle will change back automatically to normal D position operation.
Initial shift range when the "-" shift paddle switch is operated with the shift lever in D:
The initial shift range selected is based on vehicle speed and the gear that was in use prior to operating the "-" shift paddle switch.
| Gear in use when "-" shift paddle switch operated | 1st | 2nd | 3rd | 4th | 5th | 6th |
| Initial shift range | D1 | D1 | D2 | D3 | D4 | D5 |
Engine over-revving prevention with shift lever in D (fixed range mode):
If down-shifting may cause excessive engine speed, changing the shift range is prohibited.
The shift range and gear when the "-" paddle switch is operated will be selected based on the shift range and gear that were in use before operating the "-" paddle switch.
| - | Range before operating the "-" shift paddle switch | ||||||
| D6 | D5 | D4 | D3 | D2 | D1 | ||
| Gear before operating the "-" shift paddle switch | 6th | D5 range 5th gear |
- | - | - | - | - |
| 5th | D5 range 5th gear |
D4 range 4th gear |
- | - | - | - | |
| 4th | D5 range 4th gear |
D4 range 4th gear |
D3 range 3rd gear |
- | - | - | |
| 3rd | D5 range 3rd gear |
D4 range 3rd gear |
D3 range 3rd gear |
D2 range 2nd gear |
- | - | |
| 2nd | D5 range 2nd gear |
D4 range 2nd gear |
D3 range 2nd gear |
D2 range 2nd gear |
D1 range 1st gear |
- | |
| 1st | D5 range 1st gear |
D4 range 1st gear |
D3 range 1st gear |
D2 range 1st gear |
D1 range 1st gear |
D1 range 1st gear |
|
When the "-" shift paddle switch is operated with the D4 range selected and the transaxle in 4th gear, the D3 range and 3rd gear will be selected.
When the "-" shift paddle switch is operated with the D4 range selected and the transaxle in 3rd gear, the D3 range and 3rd gear will be selected.
M position test:
Note
If the shift lever is moved from D to M during the system check that occurs after the ignition switch is turned ON, both D position control and the D indication on the shift range indicator will continue until the system is confirmed to be normal.
If the shift lever is moved from D to M after the system check completes, M position control will be performed.
Check shift operation.
Check that no gear shift occurs when the shift position is changed from D to M while driving.
With the shift lever in M, drive the vehicle, move the shift lever to "+" and "-" and check that the gears change appropriately.
Tech Tips
Engine over-revving prevention when the shift lever is in M:
If down-shifting may cause excessive engine speed, changing gears is prohibited.
While driving with the shift lever in M, selection of lower gears will automatically be performed when the vehicle speed drops.
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.
CAUTION:
Before conducting this test, make sure that the test area is free from people and obstructions.
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.