DTC U3000:97 [BLIND SPOT MONITORING (BSM) SYSTEM]

id09021o066800

Description

Radar sensor sensitivity temporarily decreases depending on various external and environmental factors (Blind spot monitoring (BSM) control module (LH))

Detection condition

•  Radar sensor sensitivity in blind spot monitoring (BSM) control module (LH) 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 (LH)

•  Concavity and convexity on the surface of the repaired rear bumper

•  Blind spot monitoring (BSM) control module (LH) malfunction

System wiring diagram

Not applicable

Description	Radar sensor sensitivity temporarily decreases depending on various external and environmental factors (Blind spot monitoring (BSM) control module (LH))
Detection condition	• Radar sensor sensitivity in blind spot monitoring (BSM) control module (LH) 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 (LH) • Concavity and convexity on the surface of the repaired rear bumper • Blind spot monitoring (BSM) control module (LH) malfunction
System wiring diagram	Not applicable

Diagnostic Procedure

Step	Inspection		Action
1	INSPECT REAR BUMPER SURFACE • Visually inspect the rear bumper surface for the following: ― Dirt ― Adhered foreign material (reflective object) • Is there any dirt or foreign matter (reflective object) on the surface of the rear bumper?	Yes	Remove dirt or foreign material (reflective object), then go to Step 4.
1		No	Go to the next step.
2	INSPECT AREA AROUND BLIND SPOT MONITORING (BSM) CONTROL MODULE (LH) • Visually inspect the area around the blind spot monitoring (BSM) control module (LH) for the following: ― Dirt ― Adhered foreign material (reflective object) • Is there any dirt or foreign matter (reflective object) around the blind spot monitoring (BSM) control module (LH)?	Yes	Remove dirt or foreign material (reflective object), then go to Step 4.
2		No	Go to the next step.
3	VERIFY REAR BUMPER REPAIR HISTORY • Verify if the rear bumper had been repaired or repainted before. • Is the repair or repaint of the rear bumper Mazda genuine?	Yes	Go to the next step.
3		No	Replace the rear bumper, then go to the next step. (See REAR BUMPER REMOVAL.) (See REAR BUMPER INSTALLATION.)
4	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Clear the DTC for the blind spot monitoring (BSM) control module using the M-MDS. (See CLEARING DTC [BLIND SPOT MONITORING (BSM) SYSTEM].) • Drive the vehicle at 30 km/h {19 mph} or more. • Retrieve the blind spot monitoring (BSM) control module DTCs using the M-MDS. (See DTC INSPECTION [BLIND SPOT MONITORING (BSM) SYSTEM].) • Is the same DTC displayed?	Yes	Replace the blind spot monitoring (BSM) control module (LH), then go to the next step. (See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION.)
4		No	Go to the next step.
5	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) SYSTEM].)
5		No	DTC troubleshooting completed.