Programming and Relearning
2AR-FXE ENGINE CONTROL: SFI SYSTEM: INITIALIZATION
1. Inspection After Repair
Perform learning value reset and idle learning after replacing or servicing parts related to engine operation. Details on procedures required are indicated by an asterisk and a number, and are explained in detail following the table.
* o: Necessary.
* -: Unnecessary.
NOTICE:
Engine learned values cannot be reset by disconnecting the auxiliary battery negative (-) terminal or removing the EFI NO. 1 and ETCS fuses.
* *1: Learning Value Reset
* Connect the Techstream to the DLC3.
* Turn the power switch on (IG).
* Turn the Techstream on.
* Enter the following menus: Powertrain / Engine and ECT / Utility / Learning Value Reset.
* Confirm the following conditions as instructed on the screen.
- Power switch on (IG)
- Engine stopped
- Auxiliary battery voltage is higher than 9 V
* After confirming, select "Next" and initialize the learned value.
HINT
If a message indicating learned value initialization failure is displayed on the screen, confirm the execution conditions, and perform learned value initialization again.
* After the completion of learned value initialization, confirm the air fuel ratio learned values (A/F Learn Value Idle #1, A/F Learn Value Low #1, A/F Learn Value Mid1 #1, A/F Learn Value Mid2 #1, and A/F Learn Value High #1) in the Data List.
Result:
If 0 is displayed for all the air fuel ratio learned values, initialization has completed correctly.
If a value other than 0 is displayed for one of the air fuel ratio learned values, perform initialization again. After initialization, confirm the air fuel ratio learned values. If a value other than 0 is displayed, replace the ECM.
* *2: Idle Learning
* Turn the power switch off and wait for at least 30 seconds.
* Connect the Techstream to the DLC3.
* Turn the power switch on (IG).
* Turn the Techstream on.
* Put the engine in inspection mode (maintenance mode) Component Tests and General Diagnostics.
* Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Coolant Temp.
* Start the engine and warm it up until the engine coolant temperature is 70°C (158°F) or higher.
* Turn the power switch off, and then on (READY).
* With the shift lever in P, lightly depress the accelerator pedal to start the engine.
* Wait until the engine stops.
HINT
The engine normally stops within 1 minute. However, when the HV battery SOC is low, the engine may remain running for approximately 3 minutes.
* Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / ISC Learning.
* Confirm that the display on Techstream is Incmpl.
* Put the engine in inspection mode (maintenance mode) Component Tests and General Diagnostics.
* Start the engine.
* Confirm that the idle speed is within the standard range.
Standard:
HINT
* Be sure to perform this step with all accessories off.
* Make sure that the shift lever is in P.
* *3: Perform memory reset and idle learning after replacing the throttle with motor body assembly or cleaning deposits from the throttle with motor body assembly.
After that, check the idle speed. If the value is out of the specified range, perform the procedure below.
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
HINT
History information for driving and stopping is necessary to update idle learning.
* Connect the Techstream to the DLC3.
* Turn the power switch on (IG).
* Turn the Techstream on.
* Put the engine in inspection mode (maintenance mode) Component Tests and General Diagnostics.
* Warm up the engine (engine coolant temperature is 80°C (176°F) or higher, air conditioning and all accessories are off) [A].
* Drive the vehicle at 10 km/h (6 mph) or more [B].
* Idle the engine for 20 seconds or more [C].
* Repeat procedure [B] and [C], and check that the idle speed is within the specified range [D].
Standard:
HINT
* Be sure to perform this step with all accessories off.
* Make sure that the shift lever is in P or N.
* If the idle speed is still out of the specified range, repeat procedure [B] and [C] until the idle speed is within the specified range [E].
* *4: Drive the vehicle for a short while after replacing the knock control sensor, and check if knocking occurs. If knocking occurs, drive the vehicle until knocking stops.