DTC U3000:97 [REAR VEHICLE MONITORING SYSTEM]

id0902z2885200

System malfunction location

Radar sensor sensitivity temporarily decreases depending on various external and environmental factors (rear vehicle monitoring control module (RH))

Detection condition

•  Radar sensor sensitivity in rear vehicle monitoring control module (RH) temporarily decreases

Fail-safe

•  Inhibits the rear vehicle monitoring system.

Possible cause

•  Rear bumper soiling or foreign material (reflective object) is adhered.

•  Dirt or foreign material (reflective object) on rear vehicle monitoring control module (RH)

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

•  Rear vehicle monitoring control module (RH) malfunction

System wiring diagram

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System malfunction location	Radar sensor sensitivity temporarily decreases depending on various external and environmental factors (rear vehicle monitoring control module (RH))
Detection condition	• Radar sensor sensitivity in rear vehicle monitoring control module (RH) temporarily decreases
Fail-safe	• Inhibits the rear vehicle monitoring system.
Possible cause	• Rear bumper soiling or foreign material (reflective object) is adhered. • Dirt or foreign material (reflective object) on rear vehicle monitoring control module (RH) • Concavity and convexity on the surface of the repaired rear bumper • Rear vehicle monitoring control module (RH) malfunction
System wiring diagram	—

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 the rear bumper normal?	Yes	Go to the next step.
1		No	Remove dirt or foreign material (reflective object), then go to Step 4.
2	INSPECT AREA AROUND REAR VEHICLE MONITORING CONTROL MODULE (RH) • Visually inspect the area around the rear vehicle monitoring control module (RH) for the following. ― Dirt ― Adhered foreign material (reflective object) • Is the area around the rear vehicle monitoring control module (RH) normal?	Yes	Go to the next step.
2		No	Remove dirt or foreign material (reflective object), then go to Step 4.
3	VERIFY REAR BUMPER REPAIR HISTORY • Verify if the rear bumper had been repaired or repainted before. • Is there a problem with the repair? (Is the paint Mazda genuine?)	Yes	Go to the next step.
3		No	Replace the rear bumper, then go to the next step. (See REAR BUMPER REMOVAL/INSTALLATION.)
4	PERFORM DTC INSPECTION AND VERIFY IF MALFUNCTIONING PART IS REAR VEHICLE MONITORING CONTROL MODULE (RH) • Clear the DTC for the rear vehicle monitoring control module using the M-MDS. (See CLEARING DTC [REAR VEHICLE MONITORING SYSTEM].) • Drive the vehicle at 40 km/h {25 mph} or more. • Perform the DTC inspection for the rear vehicle monitoring control module using the M-MDS. (See DTC INSPECTION [REAR VEHICLE MONITORING SYSTEM].) • Is DTC U3000:97 displayed?	Yes	Replace the rear vehicle monitoring control module (RH), then go to the next step. (See REAR VEHICLE MONITORING CONTROL MODULE REMOVAL/INSTALLATION.)
4		No	Go to the next step.
5	VERIFY IF OTHER DTCs DISPLAYED • Are any other DTCs displayed?	Yes	Repair the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [REAR VEHICLE MONITORING SYSTEM].)
5		No	DTC troubleshooting completed.