PROBLEM SYMPTOM CONFIRMATION
Based on the result of the customer problem analysis, try to reproduce the symptoms. If the problem is that the transmission does not shift up, shift down, or the shift point is too high or too low, conduct the following road test referring to the automatic shift schedule and simulate the problem symptoms.
ROAD TEST
CAUTION:
Strictly observe posted speed limits, traffic laws and road conditions when performing the road test.
Note
Be sure to inspect and adjust the engine before performing these tests.
Perform the road test with the engine coolant temperature between 60 and 100°C (140 and 212°F) and the ATF temperature between 40 and 110°C (104 and 230°F).
Perform these tests with the air conditioning and cruise control off.
| Inspection | Procedure |
|---|---|
| Transmission Control Switch Test | With the vehicle stationary and the shift lever in D, move the shift lever to M and return it to D. Check that the meter display changes from D to the appropriate M gear and then back again. |
| M Position Test | While driving with the shift lever in M, operate the shift paddle to "+" and "-". Check that the meter display changes accordingly. |
| D Position Shift Test | While driving the vehicle normally, check that the transmission shifts up and down through each gear properly. |
| Lock-up Function | While driving on a level surface at a constant speed in the lock-up range with the shift lever in D, lightly depress the accelerator pedal and check that the engine speed does not change abruptly. |
| P Position Test | Stop the vehicle on an incline (approximately 5° or more). Then move the shift lever to P and release the parking brake. Check that the parking lock pawl holds the vehicle in place. |
| Abnormal Noise and Vibration | Check for abnormal noise and vibration while driving the vehicle forward and backward, and during shift operations. |
| Fluid Leakage | After performing all other road test inspections, check for fluid leakage. |
Tech Tips
When checking for DTCs after a repair, drive the vehicle according to the monitor drive pattern.
Shift schedule confirmation
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Enter the following menus: Powertrain / Engine / Data List.
| Tester Display |
|---|
| Vehicle Speed |
| Accelerator Position |
| Shift Status |
Check that the "Shift Status" changes in accordance with the "Vehicle Speed" as shown in the following table.
Note
All vehicle speeds indicated in the above table are actual values. Therefore, if checking a shift point with a chassis dynamometer, keep in mind that there is a margin of error in the chassis dynamometer indication.
If checking a shift point against the vehicle speed indicated on the speedometer, remember to consider the speedometer correction rate and margin of error in the tester indication.
Lock-up confirmation
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Enter the following menus: Powertrain / Engine / Data List.
| Tester Display |
|---|
| Vehicle Speed |
| Engine Speed |
| Coolant Temperature |
| Accelerator Position |
| NT Sensor Speed |
| A/T Oil Temperature No.1 |
| Lock Up Status |
| Shift Status |
When the following conditions are met, check that the difference between "Engine Speed" and "NT Sensor Speed" is 50 rpm or less.
| Accelerator Position | 13% |
| Vehicle Speed | 80 km/h (50 mph) or more |
| Shift Status | 8th gear |
| Lock Up Status | ON |
Tech Tips
Lock-up prohibition conditions:
A/T oil temperature is less than 5°C (41°F)
Engine coolant temperature is less than 25°C (77°F)
Shifting operation
Accelerator pedal opening angle is fully closed
Stop light switch is on
Manual down-shift permission speed
Manual down-shift is permitted for each shift status when the vehicle speed is below the corresponding range shown in the following table.
Shift schedule when accelerator position is fully open