Automatic Transmission System: Initialization
- 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.
- "Road test" procedure is as follows:
- Warm up the engine.
- According to the replacement parts, perform the road test shown below.PARTS SPECIFICATION
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.
HINT:
- *1: The speed, time and distance values are approximate values.
- *2: After accelerating, the deceleration does not need to be performed immediately.
- 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.
- 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 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.
- The "Reset Memory" procedure is as follows:
- Turn the engine switch off.
- Connect the Techstream to the DLC3.
- Turn the engine switch on (IG).
- Turn the Techstream on.
- Enter the following menus: Powertrain / ECT / Utility / Reset Memory.NOTE: After performing the Reset Memory, be sure to perform the ROAD TEST described previously.