DESCRIPTION
This DTC is set when the DCM (telematics transceiver) detects one of the following:
DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
---|---|---|---|
B15CC49 | Backup Battery Internal Electronic Failure | Mobilephone battery 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 Safety Connect System.
Click here
PROCEDURE
1. | CHECK DTC |
(a) Turn the engine switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG) and wait for 10 seconds or more.
(d) Turn the Techstream on.
(e) Clear the DTCs.
Body Electrical > Telematics > Clear DTCs(f) Check for DTCs and check that no DTCs are output.
Body Electrical > Telematics > Trouble CodesOK | ![]() | USE SIMULATION METHOD TO CHECK |
|
2. | CHECK MOBILEPHONE BATTERY |
(a) Replace the mobilephone battery with a normal one and check if the same problem occurs again.
Click here
NOTICE:
The mobilephone battery must not be replaced while an ACN call is in progress.
Click here
(b) Clear the DTCs.
Body Electrical > Telematics > Clear DTCs(c) Recheck for DTCs and check that no DTCs are output.
Body Electrical > Telematics > Trouble CodesOK:
No DTCs are output.
OK | ![]() | PERFORM INITIALIZATION |
|
3. | REPLACE DCM (TELEMATICS TRANSCEIVER) |
(a) Replace the DCM (telematics transceiver) with a new one.
Click here
NOTICE:
NEXT | ![]() | PERFORM DCM ACTIVATION |
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Lighting System (w/ Automatic Headlight Beam Level Control System): Automatic High Beam System does not Operate or Operation Indicator does not Illuminate
DESCRIPTION The main body ECU (multiplex network body ECU) controls the automatic high beam system based on signals received from the forward recognition camera. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE:
Before replacing the main body ECU (multiplex network body ECU), refer to Registration. ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Audio And Visual System (for 12.3 Inch Display): Panel Switches do not Function
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 PANEL SWITCH (a) Check fo ...