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Automatic Transmission System: Initialization

  1. PERFORM ROAD TEST TO ALLOW TCM TO LEARN 
    CAUTION:
    • Perform the following procedures while strictly observing all traffic laws and speed limits.
    • Do not accelerate or decelerate rapidly.
    1. "Road test" procedure is as follows:
      1. Warm up the engine.
      2. According to the replacement parts, perform the road test shown below.
        ROAD TEST REFERENCE

        Replacement Parts Road Test
        • Automatic transmission assembly
        • TCM
        • Valve body assembly
        • Shift solenoid valve SL3 Engine assembly
        • ECM
        		 Perform pattern 1 and 2
        Pattern 1:(1)
        With shift lever on D, after gradually accelerating to 50 km/h (31 mph) or more, gradually decelerate to approx. 30 km/h (19 mph)
        Pattern 2:(2)
        With shift lever on S4, after gradually accelerating to 30 km/h (19 mph) or more, gradually decelerate to approx. 10 km/h (6 mph)
        • Shift solenoid valve SL1
        • Shift solenoid valve SL2
        • Shift solenoid valve SL4
        • Shift solenoid valve SL5
        		 Pattern 1:(1)
        With shift lever on D, after gradually accelerating to 50 km/h (31 mph) or more, gradually decelerate to approx. 30 km/h (19 mph)
        HINT:
        (1) After gradually accelerating a distance of approximately 130 m (426.4 ft.) for a period of approximately 15 seconds, gradually decelerate a distance of approximately 45 m (147.6 ft.) for a period of approximately 5 seconds.
        (2) After gradually accelerating a distance of approximately 40 m (131.2 ft.) for a period of approximately 8 seconds, gradually decelerate a distance of approximately 20 m (65.6 ft.) for a period of approximately 5 seconds.
        • When decelerating, apply the brakes as necessary to adjust the vehicle speed.
        Fig 1: Road Test Pattern
        G04948275Courtesy 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. Repeat until the shift shock and engine speed overrun settles down.
        NOTE: Before repeating tests, stop the vehicle once, and then start moving the vehicle again.
  2. RESET MEMORY 
    NOTE:
    • Perform the RESET MEMORY (AT initialization) when replacing the engine assembly or ECM.
    • The RESET MEMORY can be performed only with the intelligent tester or Techstream.
    • RESET MEMORY cannot be completed by only reconnecting the cable to the negative (-) battery terminal.

    HINT:

    The TCM memorizes the vehicle conditions when the ECT controls the automatic transmission assembly and engine assembly.

    1. "RESET MEMORY" procedure is as follows:
      1. Turn the engine switch off.
      2. Connect the intelligent tester or Techstream to the DLC3.
      3. Turn the engine switch on (IG).
      4. Turn the tester ON.
      5. Enter the following menus:

        Intelligent tester 

        Select: DIAGNOSIS / OBD/ MOBD / ECT / RESET MEMORY.

        Techstream 

        Select: Powertrain / ECT / Utility / Reset Memory.

        NOTE: After performing the RESET MEMORY, be sure to perform the ROAD TEST (see ROAD TEST  ) described previously.
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