Automatic Transmission System: Initialization: Initialization

1. "Road test" procedure is as follows:
   1. Warm up the engine.
   2. According to the replaced parts, perform the road test shown below.

      Replaced Parts	Road Test
      Automatic transmission assembly TCM Valve body assembly Shift solenoid valve SL3 Engine assembly ECM	Perform pattern 1, 2 and 3 Pattern 1:*1  With shift lever in D, after gradually accelerating to 50 km/h (31 mph) or more, gradually decelerate to approx. 30 km/h (19 mph) Pattern 2:  When driving at approximately 50 km/h (31 mph) with the D4 range selected, release the accelerator pedal to allow the vehicle to decelerate gradually to approximately 10 km/h (6 mph). Pattern 3:*2  Accelerate to a speed higher than 50 km/h (31 mph). While gradually decelerating with shift lever in M and 5th gear selected, downshift to 4th gear at approx. 50 km/h (25 mph), to 3rd gear at approx. 40 km/h (25 mph), and to 2nd gear at approx. 30 km/h (19 mph).
      Shift solenoid valve SL1 Shift solenoid valve SL2 Shift solenoid valve SL4 Shift solenoid valve SL5	Perform pattern 1 and 3 Pattern 1:*1  With shift lever in D, after gradually accelerating to 50 km/h (31 mph) or more, gradually decelerate to approx. 30 km/h (19 mph) Pattern 3:*2  Accelerate to a speed higher than 50 km/h (31 mph). While gradually decelerating with shift lever in M and 5th gear selected, downshift to 4th gear at approx. 50 km/h (25 mph), to 3rd gear at approx. 40 km/h (25 mph), and to 2nd gear at approx. 30 km/h (19 mph).

      HINT: 

      • *1: After gradually accelerating for a distance of approximately 130 m (426.4 ft.) for a period of approximately 15 seconds, gradually decelerate for a distance of approximately 45 m (147.6 ft.) for a period of approximately 5 seconds.
      • *2: Accelerate the vehicle to a speed slightly higher than 50 km/h (31 mph).

        Move the shift lever to M and select 5th gear.

        Release the accelerator pedal and allow the vehicle to decelerate gradually.

        When the vehicle decelerates to approximately 50 km/h (31 mph), downshift to 4th gear.

        When the vehicle decelerates to approximately 40 km/h (25 mph), downshift to 3rd gear.

        When the vehicle decelerates to approximately 30 km/h (19 mph), downshift to 2nd gear.

      • When decelerating, apply the brakes as necessary to adjust the vehicle speed.
      Fig 1: Driving Pattern Graph

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT: 

      • *1: The speed, time and distance values are approximate values.
      • *2: After accelerating, the deceleration does not need to be performed immediately.
      • *3: There is no specified time or distance.
   3. Repeat the road tests until the shift shock and engine speed overrun (engine speed flare when shifting) reach an acceptable level.
      NOTE:

      When repeating the acceleration/deceleration cycle of a road test pattern, bring the vehicle to a complete stop before accelerating again.

HINT: 

The TCM (ECT) memorizes the vehicle conditions when controlling the automatic transmission assembly and engine assembly.

1. The "Reset Memory" procedure is as follows:
   1. Turn the engine switch off.
   2. Connect the Techstream to the DLC3.
   3. Turn the engine switch on (IG).
   4. Turn the Techstream on.
   5. Enter the following menus: Powertrain / ECT / Utility / Reset Memory.
      NOTE:

      After performing the Reset Memory, be sure to perform the Road Test described previously. Refer to ROAD TEST .