Road Test
ROAD TEST1. PROBLEM SYMPTOM CONFIRMATION
(a) 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.
2. ROAD TEST
NOTICE: Perform the test at the normal operating ATF temperature of 50 to 80°C (122 to 176°F).
(a) D position test Shift into the D position, fully depress the accelerator pedal and check the following points.
(1) Check up-shift operation. Check that the 1 -> 2, 2 -> 3, 3 -> 4 and 4 -> 5 up-shifts take place at the shift point shown in the automatic shift schedule.
HINT:
5th Gear Up-shift Prohibition Control
^ Engine coolant temperature is less than 55°C (131°F) and vehicle speed is at less than 51 km/h (32 mph).
4th Gear Up-shift Prohibition Control
^ Engine coolant temperature is less than 40°C (104°F) and vehicle speed is at less than 45 km/h (28 mph).
Lock-up Prohibition Control
^ Brake pedal is depressed.
^ Accelerator pedal is released.
^ Engine coolant temperature is less than 60°C (140°F).
^ Lock up in 5th gear is not engaged when shift position is S4.
^ Lock up in 3rd gear is engaged when ATF temperature is more than 120°C (248°F).
^ Lock up control during accelerating is not engaged when shift position is S1, or in 1st gear.
(2) Check for shift shock and slippage. Check for shock and slippage at the 1 -> 2, 2 -> 3, 3 -> 4 and 4 -> 5 up-shifts.
(3) Check for abnormal noise and vibration. Check for abnormal noise and vibration when up-shifting from 1 -> 2, 2 -> 3, 3 -> 4 and 4 -> 5 while driving with the shift lever in the D position, and also check while driving in the lock-up condition.
HINT: 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.
(4) Check kick-down operation. Check vehicle speeds when the 2nd to 1st, 3rd to 2nd, 4th to 3rd, and 5th to 4th kick-downs take place while driving with the shift lever in the D position. Confirm that each speed is within the applicable vehicle speed range indicated in the automatic shift schedule.
(5) Check for abnormal shock and slippage at kickdown.
(6) Check the lock-up mechanism.
^ Drive in the D position (5th gear) at a steady speed (lock-up ON).
^ Lightly depress the accelerator pedal and check that the engine speed does not change abruptly.
HINT: If there is a sudden increase in engine speed, there is no lock-up.
(b) S position test
(1) Check shift operation.
^ While driving the vehicle in 5th gear with the shift lever on D, move the shift lever to S and return to D. Check that the gear change 5 -> 4 down-shift and 4 -> 5 up-shift can be performed.
^ With the shift lever on S (while the vehicle is stopped), shift into the "+" position to check that the shift position on the combination meter changes as follows: 1 -> 2, 2 -> 3, 3 -> 4 and 4 -> 5.
^ While driving the vehicle in 5th gear with the shift lever on S5 (at a vehicle speed of approximately 55 to 65 km/h (34 to 40 mph)), shift into the "-" position and check if the 4th gear down-shift occurs and the engine brake operates properly.
^ While driving the vehicle in 4th gear with the shift lever on S4 (at a vehicle speed of approximately 30 to 40 km/h (19 to 25 mph)), shift into the "-" position and check if the 3rd gear down-shift occurs and the engine brake operates properly.
^ While driving the vehicle in 3rd gear with the shift lever on S3 (at a vehicle speed of approximately 20 to 30 km/h (12 to 19 mph)), shift into the "-"position and check if the 2nd gear down-shift occurs and the engine brake operates properly.
^ While driving the vehicle in 2nd gear with the shift lever on S2 (at a vehicle speed of approximately 10 to 20 km/h (6 to 12 mph)), shift into the "-" position and check if the 1st gear down-shift occurs and the engine brake operates properly.
HINT: Manual shift (S position) is prohibited under either of the following conditions:
^ Down-shifting that causes engine overrun.
^ The driver continuously down-shifts (Downshifting to 1st gear may not be performed).
(c) R position test
Shift into the R position, lightly depress the accelerator pedal, and check that the vehicle moves backward without any abnormal noise or vibration.
CAUTION: Before conducting this test, ensure that the test area is free from people and obstruction.
(d) P position test
Stop the vehicle on an incline (more than 5°) and after shifting into the P position, release the parking brake. Then, check that the parking lock pawl holds the vehicle in place.