Lexus ES: Initialization
INITIALIZATION
RESET TRANSAXLE COMPENSATION CODE
NOTICE:
-
If the following parts have been replaced, initialize the ECM, perform Reset Memory and Perform Road Test to Allow ECM to Learn.
- ECM (When transaxle compensation code cannot be transferred.)
- Transmission valve body assembly
- Solenoid (SL1) valve
- Solenoid (SL2) valve
- Solenoid (SL3) valve
- Solenoid (SL4) valve
- Solenoid (SL5) valve
- Solenoid (SL6) valve
- The transaxle compensation code can only be initialized with the Techstream.
HINT:
The ECM (ECT) memorizes the vehicle conditions when controlling the automatic transaxle assembly and engine assembly.
Therefore, if the automatic transaxle assembly or ECM has been replaced, it is necessary to reset the memory so that the ECM can memorize the new information. The reset procedure is as follows:
(a) Make sure the shift lever is in P or N.
(b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG).
(d) Turn the Techstream on.
(e) Enter the following menus: Powertrain / Transmission / Utility / A/T Code Reset.
Powertrain > Transmission > Utility| Tester Display |
|---|
| A/T Code Reset |
(f) Press "Next" again to proceed.
NOTICE:
After the transaxle compensation code is initialized, perform Reset Memory and Perform Road Test to Allow ECM to Learn.
(g) Press "Exit".
RESET MEMORY
NOTICE:
- Perform Reset Memory (AT initialization) after replacing the automatic transaxle assembly, transmission valve body assembly or any of the solenoid (SL1, SL2, SL3, SL4, SL5 and/or SL6) valves.
- Reset Memory can only be performed with the Techstream.
- Reset Memory cannot be completed by only disconnecting and reconnecting the cable to the negative (-) battery terminal.
HINT:
The ECM (ECT) memorizes the vehicle conditions when controlling the automatic transaxle assembly and engine assembly.
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Transmission / Utility / Reset Memory.
Powertrain > Transmission > Utility| Tester Display |
|---|
| Reset Memory |
(e) Press "Next".
NOTICE:
After performing Reset Memory, be sure to perform Perform Road Test to Allow ECM to Learn.
PERFORM ROAD TEST TO ALLOW ECM TO LEARN
CAUTION:
- Perform the following procedures while strictly observing all traffic laws and speed limits.
- Do not accelerate or decelerate rapidly.
(a) The "road test" procedure is as follows:
(1) Warm up the engine.
(2) According to the replaced parts, perform the appropriate road test shown below.
| Replaced Parts | Road Test |
|---|---|
| Perform pattern
|
HINT:
- After gradually accelerating over a distance of approximately 220 m (721.9 ft.) for a period of approximately 20 seconds, gradually decelerate over a distance of approximately 200 m (656.2 ft.) for a period of approximately 20 seconds.
- When decelerating, apply the brakes as necessary to adjust the vehicle speed.
.png)
NOTICE:
- *1: The speed, time and distance values are approximate values.
- *2: After accelerating, deceleration does not need to be performed immediately.
(3) Repeat the road test until the shift shock and engine speed overrun (engine speed flare when shifting) reach an acceptable level.
NOTICE:
When repeating the acceleration/deceleration cycle of a road test pattern, bring the vehicle to a complete stop before accelerating again.
PERFORM ATF THERMAL DEGRADATION ESTIMATE RESET
NOTICE:
If either of the following conditions is met, perform ATF Thermal Degradation Estimate Reset:
-
The ATF has been replaced.
HINT:
If 50000 or more is displayed for the Data List item "ATF Thermal Degradation Estimate", thermal degradation of the ATF is suspected. Perform ATF Thermal Degradation Estimate Reset after replacing the ATF.
- Approximately 50% or more of the ATF has been replaced during a repair of the transaxle or a similar operation.
(a) Turn the engine switch off.
(b) Connect the Techstream to the DLC3.
(c) With the shift lever in P, turn the engine switch on (IG).
NOTICE:
Do not start the engine.
(d) Turn the Techstream on.
(e) Enter the following menu: Powertrain / Transmission / Utility / ATF Thermal Degradation Estimate Reset.
Powertrain > Transmission > Utility| Tester Display |
|---|
| ATF Thermal Degradation Estimate Reset |
(f) According to the display on the Techstream, initialize the estimated thermal degradation value.
READ NEXT:
Manual Shifting Test
MANUAL SHIFTING TEST MANUAL SHIFTING TEST HINT:
Using this test, it can be determined whether a problem is in an electrical circuit or if it is a mechanical problem in the transaxle.
If any abnor
Mechanical System Tests
MECHANICAL SYSTEM TESTS STALL SPEED TEST CAUTION:
Do not perform a stall test if there are any people or objects near the vehicle.
The vehicle could begin moving suddenly, resulting in a serious
Monitor Drive Pattern
MONITOR DRIVE PATTERN MONITOR DRIVE PATTERN FOR ECT CAUTION: Perform the following procedure on a level surface while strictly observing all traffic laws and speed limits. HINT: Performing this drive
SEE MORE:
Tire Pressure Monitor ECU Communication Stop Mode
DESCRIPTION Detection Item Symptom Trouble Area Tire Pressure Monitor ECU Communication Stop Mode Any of the following conditions are met:
Communication stop for "Tire Pressure" is indicated on the "Communication Bus Check" screen of the Techstream.
Click here
Communication stop
Open in One Side of Bus 5 Branch Line
DESCRIPTION When the CAN bus main lines are normal (no open, short to ground, short to +B or short between lines) and there is an ECU or sensor on the "Communication Bus Check" screen that is indicated as not communicating or whose connection status on the "Communication Bus Check" screen changes in
