Lexus NX: Certification ECU Vehicle Information Reading/Writing Process Malfunction (B15F7)
DESCRIPTION
This DTC is stored when items controlled by the certification ECU cannot be customized via the navigation system vehicle customization screen.
HINT:
The certification ECU 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 vehicle setting processing error. |
|
CAUTION / NOTICE / HINT
NOTICE:
-
When replacing the radio receiver assembly, always replace it with a new one.
If a radio receiver assembly which was installed to another vehicle is used, the following may occur:
- A communication malfunction DTC may be stored.
- The radio receiver assembly may not operate normally.
-
Before replacing the certification ECU (smart key ECU assembly), refer to smart access system with push-button start (for Entry Function) Precaution.
Click here
Click here
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HINT:
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.
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 communication DTCs are not output.
| NG | .gif) | GO TO CAN COMMUNICATION SYSTEM |
|
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| 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) |
|
| 3. | CHECK CUSTOMIZE ITEMS |
(a) Display the "Vehicle Customization" screen.
(b) Make a note of the customizable items for each certification ECU related system.
HINT:
These items shown as customizable via the navigation system vehicle customization screen can also be changed manually. In a following step, a manual procedure will be used.
(1) Check the customize parameters list for the smart access system with push-button start (for Entry Function) related items that can be customized via the multi-display assembly screen.
Click here
(c) Manually change and confirm that it was possible to successfully change the settings of the customize parameters for each system that are available for customization via the multi-display assembly screen.
OK:
The items available for customization via the multi-display assembly screen can be customized successfully using the manual procedure.
| OK | | REPLACE RADIO RECEIVER ASSEMBLY |
| NG | | REPLACE CERTIFICATION ECU |
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SEE MORE:
Removal
REMOVAL PROCEDURE 1. PRECAUTION NOTICE: After the power switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal. Click here 2. REMOVE NO. 3 DECK BOARD SUB-ASSEMBLY Click here 3. REMOVE REAR DECK FLOOR BOX Click here 4. REMOVE DECK FLOO
Replacement
REPLACEMENT PROCEDURE 1. REPLACE INTAKE VALVE GUIDE BUSH (a) Heat the cylinder head sub-assembly to approximately 80 to 100°C (176 to 212°F). (b) Place the cylinder head sub-assembly on wooden blocks. (c) Using SST and a hammer, tap out the intake valve guide bush. SST: 09201-01055 SST: 09950-7
