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. The "road test" procedure is as follows:


      1. Warm up the engine.

      2. According to the parts replaced, perform the road test shown below.

        Parts Replaced Road Test

        • Automatic w/transfer transmission assembly

        • TCM

        • Valve body assembly

        • Shift solenoid valve SL3

        • Engine assembly

        • ECM

        Perform pattern 1 and 2


          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:*2

        • With S4 range selected, 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 in D, after gradually accelerating to 50 km/h (31 mph) or more, gradually decelerate to approx. 30 km/h (19 mph)

        Tech Tips


        • *1: After gradually accelerating over a distance of approximately 130 m (426.4 ft.) for a period of approximately 15 seconds, gradually decelerate over a distance of approximately 45 m (147.6 ft.) for a period of approximately 5 seconds.

        • *2: After gradually accelerating over a distance of approximately 40 m (131.2 ft.) for a period of approximately 8 seconds, gradually decelerate over 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.

        A01GMAPE01

        Tech Tips


        • *1: The speed, time and distance values are approximate values.

        • *2: After accelerating, deceleration does not need to be performed immediately.

      3. Repeat until the shift shock and engine overrun settles down.

        Note

        Before repeating tests, stop the vehicle once, and then start moving the vehicle again.

  2. RESET MEMORY

    Note


    • Perform Reset Memory (AT initialization) when replacing the engine assembly or ECM.

    • Reset Memory can be performed only with the intelligent tester.

    • Reset Memory cannot be completed by only reconnecting the cable to the negative (-) battery terminal.

    Tech Tips

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


    1. The Reset Memory procedure is as follows:


      1. Turn the engine switch off.

      2. Connect the intelligent tester to the DLC3.

      3. Turn the engine switch on (IG).

      4. Turn the intelligent tester ON.

      5. Enter the following menus: Powertrain / ECT / Utility / Reset Memory.

        Note

        After performing Reset Memory, be sure to perform Road Test described previously.