INITIALIZATION
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.
Part Replaced | Engine Operation | Learning Value Reset*1 | Idle Learning*2 |
---|---|---|---|
| - | ○ | ○ |
Engine assembly | - | ○ | ○ |
| Confirm the following and perform Learning Value Reset and Idle Learning when one or more of the following conditions is met:
| ○ | ○ |
The none of the conditions in the list above are met. | - | - | |
Knock control sensor*4 | - | - | - |
NOTICE:
Engine learned values cannot be reset by disconnecting the cable from the negative (-) battery terminal or removing the EFI-MAIN and ETCS fuses.
HINT:
If a message indicating learned value initialization failure is displayed on the screen, confirm the execution conditions, and perform learned value initialization again.
If 0 is displayed for all of 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.
HINT:
Learning starts when the engine coolant temperature is 80°C (176°F) or higher.
Standard:
Engine Idle Speed |
---|
650 to 750 rpm |
HINT:
After that, check the idle speed. If the idle speed is out of the specified range, perform the following procedure.
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.
Standard:
Engine Idle Speed |
---|
650 to 750 rpm |
HINT:
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Intelligent Clearance Sonar System: Vehicle Information Unmatched (C168D)
DESCRIPTION If the vehicle information stored in the main body ECU (multiplex network body ECU) which is sent via CAN communication during the clearance warning ECU assembly self-diagnosis does not match that of clearance warning ECU assembly, DTC C168D is stored. DTC No. Detection Item DTC D ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Cylinder Head: Replacement
REPLACEMENT CAUTION / NOTICE / HINT HINT:
Use the same procedure for bank 1 and bank 2.
The following procedure is for bank 2.
PROCEDURE 1. REPLACE INTAKE VALVE GUIDE BUSH (a) Heat the cylinder head LH to between 80 and 100°C (176 and 212°F). (b) Place the cylinder head LH on wooden blocks ...