Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Certification ECU Vehicle Information Reading/Writing Process Malfunction (B15F7)

DESCRIPTION

This DTC is stored when items controlled by the certification ECU (smart key ECU assembly) cannot be customized via the navigation system vehicle customization screen.

HINT:

The certification ECU (smart key ECU assembly) controls the smart access system with push-button start (for Entry Function) related items that are customizable via the multi-display assembly screen.

CAUTION / NOTICE / HINT

NOTICE:

Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Navigation System.

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PROCEDURE

(a) Use the Techstream to check if the CAN communication system is functioning normally.

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OK:

CAN communication DTCs are not output.

NG

GO TO CAN COMMUNICATION SYSTEM

OK

(a) Check if the smart access system with push-button start (for Entry Function) is malfunctioning.

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HINT:

Customization may not be possible depending on the malfunction in the smart access system with push-button start (for Entry Function).

OK:

No malfunctions are present in the smart access system with push-button start (for Entry Function).

NG

GO TO SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Entry Function)

OK

(a) Clear the DTCs.

NEXT

(a) Recheck for DTCs.

A

END

B

REPLACE RADIO RECEIVER ASSEMBLY