CVT FLUID PRESSURE CONTROL LEARNING PROCEDURE


AIM


When the CVT-ECU is replaced or when the learned value is initialised, the CVT-ECU does not have any learned value. This may degrade the shift quality. The CVT-ECU learns by repeating normal driving. In order to make the CVT-ECU learn faster, follow the procedure below.

LEARNING PROCEDURE


Steps
 Item
 Contents
1
 Engine idling learning
 Refer to GROUP 00 - Precautions Before Service - Learning Procedure For Idling In MPI Engine .
2
 CVT fluid temperature measurement
 Use the M.U.T.-III to measure the CVT fluid temperature (data list item No. 21).
3
 CVT fluid temperature adjustment
 Start the engine and warm it up until the CVT fluid temperature reaches approximately 80°C.
If the CVT fluid temperature does not rise to 80°C in cold climates, raise the fluid temperature as much as possible.
4
 Secondary pressure sensor learning
  1. Start the engine when the selector lever is in the "P" range and the vehicle is stopped.
  2. Turn the ignition switch to the "LOCK" (OFF) position to stop the engine.
  3. Wait for 30 seconds in the state described in Step 2.
  4. Repeat above steps 1 to 3 three times to complete learning.
5
 Select control learning
caution When moving the selector lever from the "N" range to the "D" range, and from the "N" range to the "R" range, hold for 5 seconds or more in each range.

  1. Start the engine, and move the selector lever from the "N" range to the "D" range and from the "N" range to the "R" range (two or three times each). If there is no shift shock, the learning is complete.
  2. If the shift shock is large, move the selector lever from the "N" range to the "D" range and from the "N" range to the "R" range (up to 10 times each) and the learning is complete.
6
 Shift control learning 1 <Vehicles for Thailand and GCC>
  1. Check that the idle neutral active status (data list item No. 40) can be monitored by using the M.U.T.-III.
  2. Start the engine and wait for at least one minute.
  3. Turn off the air conditioner.
  4. While the selector lever is at the "D" range, drive the vehicle at 10 km/h or more. Then, stop the vehicle with the selector lever at the "D" range.
  5. Depress the brake pedal to activate the idle neutral control, and wait for 30 seconds or more.
  6. Carry out Step 5 and Step 6 again to complete learning.
7
 Shift control learning 2
  1. Start the engine.
  2. Turn off the air conditioner.
  3. Accelerate the vehicle to 60km/h at "D" range, meanwhile to keep accelerator pedal opening angle is 10% to 15%*. Depress the brake pedal to decelerate and stop the vehicle. Turn the ignition switch to the "LOCK" (OFF) position to stop the engine and wait for 5 seconds.
  4. If there is no shift shock, the learning at Step 3 is complete. If the shift shock is large, repeat Step 2 and Step 3 (up to 5 times).
  5. Accelerate the vehicle to 60km/h at "D" range, meanwhile to keep accelerator pedal opening angle is 25% to 50%*. Drive at a constant speed for 5 seconds, and depress the brake pedal to decelerate and stop the vehicle. Turn the ignition switch to the "LOCK" (OFF) position to stop the engine and wait for 5 seconds.
  6. If there is no shift shock, the learning at Step 5 is complete. If the shift shock is large, repeat Step 2 and Step 5 (up to 10 times) and the learning is complete.
note *: Reference: Data list item No.15 "Accelerator pedal depressing angle" on M.U.T.-III.