Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: D-Seat ECU Vehicle Information Reading/Writing Process Malfunction (B15F8)
DESCRIPTION
This DTC is stored when items controlled by the main body ECU (multiplex network body ECU) cannot be customized via the navigation system vehicle customization screen.
HINT:
The main body ECU (multiplex network body ECU) controls the front power seat control system (w/ Memory) related items that are customizable via the multi-display assembly screen.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B15F8 | D-Seat ECU Vehicle Information Reading/Writing Process Malfunction | Main body ECU (multiplex network body ECU) vehicle setting processing malfunction |
|
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
| 1. | CHECK CAN COMMUNICATION SYSTEM |
(a) Use the Techstream to check if the CAN communication system is functioning normally.
Click here
OK:
CAN communication DTCs are not output.
| NG |  | GO TO CAN COMMUNICATION SYSTEM |
|
| 2. | CHECK FRONT POWER SEAT CONTROL SYSTEM (w/ Memory) |
(a) Check if the front power seat control system (w/ Memory) is malfunctioning.
Click here
HINT:
Customization may not be possible depending on the malfunction in the front power seat control system (w/ Memory).
OK:
No malfunctions are present in the front power seat control system (w/ Memory).
| NG | | GO TO FRONT POWER SEAT CONTROL SYSTEM (w/ Memory) |
|
| 3. | CLEAR DTC |
(a) Clear the DTCs.
Body Electrical > Navigation System > Clear DTCs
|
| 4. | CHECK FOR DTC |
(a) Recheck for DTCs.
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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Other materials:
Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Intelligent Clearance Sonar System: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT:
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspect ...
Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Navigation System: Main Body ECU Vehicle Information Reading/Writing Process Malfunction (B15F6)
DESCRIPTION This DTC is stored when items controlled by the main body ECU (multiplex network body ECU) cannot be customized via the navigation system vehicle customization screen. HINT: The main body ECU (multiplex network body ECU) controls the items for the following systems that are customizable ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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