DTC U1A4B-97: Radar Sensor: Notes

WARNING: This page is about a different car, the 2016 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION:

When replacing a blind spot monitoring (BSM) control module (RH) having any of the following part numbers, it is necessary to replace the blind spot monitoring (BSM) control module (LH) at the same time to perform the configuration normally.
- N243-67Y80 A
- N243-67Y80 B
- N243-67Y80 C

Description	Radar sensor sensitivity temporarily decreases depending on various external and environmental factors (blind spot monitoring (BSM) control module (RH))
Detection condition	Radar sensor sensitivity in blind spot monitoring (BSM) control module (RH) decreases for 5 s or more with the ignition switched ON (engine off or on).
Fail-safe	Blind spot monitoring (BSM) system is stopped.
Possible cause	Rear bumper dirt or foreign material (reflective object) is adhered. Dirt or foreign material (reflective object) on blind spot monitoring (BSM) control module (RH) Concavity and convexity on the surface of the repaired rear bumper Blind spot monitoring (BSM) control module (RH) malfunction
System wiring diagram	Not applicable