Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: Certification ECU Vehicle Information Reading/Writing Process Malfunction (B15F7)

Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual / Audio & Visual & Telematics / Audio / Video / Audio And Visual System (for 12.3 Inch Display) / 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 audio and visual 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.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B15F7

Certification ECU Vehicle Information Reading/Writing Process Malfunction

Certification ECU (smart key ECU assembly) vehicle setting processing malfunction

  • CAN communication system
  • Smart access system with push-button start (for Entry Function)
  • Certification ECU (smart key ECU assembly)
  • Radio receiver assembly

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 Audio and Visual System.

Click here

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

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

Click here

OK:

CAN DTCs are not output.

NG

GO TO CAN COMMUNICATION SYSTEM

OK

2.

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

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

Click here

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

3.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Navigation System > Clear DTCs
NEXT

4.

CHECK FOR DTC

(a) Recheck for DTCs and check that no DTCs are output.

Body Electrical > Navigation System > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTCs are output

B

A

END

B

REPLACE RADIO RECEIVER ASSEMBLY

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