DTC U1A4B:43/U1A4B:44/U1A4B:45/U1A4B:46/U1A4B:47/U1A4B:48/U1A4B:49/U1A4B:96 [BLIND SPOT MONITORING (BSM) CONTROL MODULE (Except Australian specs.)]

id1502b8015000

Description

Blind spot monitoring (BSM) control module (RH) malfunction
Detection condition
•  U1A4B:43
―  Blind spot monitoring (BSM) control module (RH) external RAM malfunction detected with the ignition switched ON (engine off or on).
•  U1A4B:44
―  Blind spot monitoring (BSM) control module (RH) internal RAM malfunction detected with the ignition switched ON (engine off or on).
•  U1A4B:45
―  Blind spot monitoring (BSM) control module (RH) ROM malfunction detected with the ignition switched ON (engine off or on).
•  U1A4B:46
―  Blind spot monitoring (BSM) control module (RH) EEPROM malfunction detected with the ignition switched ON (engine off or on).
•  U1A4B:47
―  Blind spot monitoring (BSM) control module (RH) monitoring system malfunction detected with the ignition switched ON (engine off or on).
•  U1A4B:48
―  Blind spot monitoring (BSM) control module (RH) communication circuit malfunction detected with the ignition switched ON (engine off or on).
•  U1A4B:49
―  Blind spot monitoring (BSM) control module (RH) voltage control circuit malfunction detected for 1 s or more with the ignition switched ON (engine off or on).
•  U1A4B:96
―  Blind spot monitoring (BSM) control module (RH) internal circuit malfunction detected for 1 s or more with the ignition switched ON (engine off or on).
Fail-safe
•  U1A4B:43
―  Blind spot monitoring (BSM) system is stopped.
•  U1A4B:44
―  Blind spot monitoring (BSM) system is stopped.
•  U1A4B:45
―  Blind spot monitoring (BSM) system is stopped.
•  U1A4B:46
―  Blind spot monitoring (BSM) system is stopped.
•  U1A4B:47
―  Blind spot monitoring (BSM) system is stopped.
•  U1A4B:48
―  Blind spot monitoring (BSM) system is stopped.
•  U1A4B:49
―  Blind spot monitoring (BSM) system is stopped.
•  U1A4B:96
―  Blind spot monitoring (BSM) system is stopped.
Possible cause
•  Blind spot monitoring (BSM) control module (RH) malfunction
System wiring diagram
Not applicable

Diagnostic Procedure

Step

Inspection

Action
1
VERIFY IF MALFUNCTIONING LOCATION IS BLIND SPOT MONITORING (BSM) CONTROL MODULE (RH) DEPENDING ON REPEATABILITY
•  Clear the DTC for the blind spot monitoring (BSM) control module using the M-MDS.
•  Switch the ignition ON (engine off or on) and wait for 2.5 s or more.
•  Retrieve the blind spot monitoring (BSM) control module DTCs using the M-MDS.
•  Is the same DTC displayed?
Yes
Replace the blind spot monitoring (BSM) control module (RH), then go to the next step.
(See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION [Except Australian specs.].)
No
Go to the next step.
2
VERIFY IF OTHER DTCs DISPLAYED
•  Are any other DTCs displayed?
Yes
Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [BLIND SPOT MONITORING (BSM) CONTROL MODULE (Except Australian specs.)].)
No
DTC troubleshooting completed.