Toyota AVENSIS 2000 Supplement Manual page 197

DI–66
4. PROBLEM SYMPTOM CONFIRMATION
Taking into consideration the results of the customer problem analysis, try to reproduce the symptoms of the
trouble. If the problem is that the transaxle 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 symp-
toms.
5. ROAD TEST
NOTICE:
Conduct the test at normal operating ATF temperature 50 – 80 °C (122 – 176 °F).
(a) D range test
Shift into the D range and fully depress the accelerator pedal and check the following points:
(1) Check up–shift operation.
Check to see that 1 → 2, 2 → 3 and 3 → O/D up–shift takes place, and that the shift points con-
form to the automatic shift schedule (See page SS–23).
HINT:
O/D Gear Up–shift Prohibition Control (1. Water temp. is 60 °C (140 °F) or less. 2. If there is a 10 km/h
S
(6 mph) difference between the set cruise control speed and vehicle speed.)
O/D Gear Lock–up Prohibition Control (1. Brake pedal is depressed. 2. Water temp. is 60 °C (140 °F)
S
or lower)
(2) Check for shift shock and slip.
Check for shock and slip at the 1 → 2, 2 → 3 and 3 → O/D up–shift.
(3) Check for abnormal noises and vibration.
Run in D range lock–up or O/D gear and check for abnormal noises and vibration.
HINT:
The check for the cause of abnormal noises and vibration must be done very thoroughly as it could also be
sure to loss of balance in the differential, torque converter, etc.
(4) Check kick–down operation.
While running in the D range, 2nd, 3rd and O/D gears, check to see that the possible kick–down
vehicle speed limits for 2 → 1, 3 → 2 and O/D → 3 kick–downs conform to those indicated in the
automatic shift schedule (See page SS–23).
(5) Check for abnormal shock and slip at kick–down.
(6) Check the lock–up mechanism.
S
Drive in D range O/D gear, at a steady speed (lock–up ON) of about 60 km/h (37 mph).
S
Lightly depress the accelerator pedal and check that the engine speed does not change
abruptly.
If there is a big jump in engine speed, there is no lock–up.
(b) 2 range test
Shift into the 2 range and fully depress the accelerator pedal and check the following points:
(1) Check up–shift operation.
Check to see that the 1 → 2 up–shift takes place and that the shift point conforms to the automatic
shift schedule (See page SS–23).
HINT:
There is no O/D up–shift and lock–up in the 2 range.
(2) Check engine braking.
While running in the 2 range and 2nd gear, release the accelerator pedal and check the engine
braking effect.
AVENSIS/CORONA SUP (RM781E)
DIAGNOSTICS – AUTOMATIC TRANSAXLE (U240E)
(b) Clear the DTC.
The following actions will erase the DTC and freezed
frame data. Operating an OBD scan tool or hand–held
tester to erase the codes (See the OBD scan tool's
instruction book for operating instructions.).