DTC U3000:97 [REAR VEHICLE MONITORING SYSTEM]


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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.
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.
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.
No
Replace the rear bumper, then go to the next step.
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.
•  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.
•  Is DTC U3000:97 displayed?
Yes
Replace the rear vehicle monitoring control module (RH), then go to the next step.
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.
No
DTC troubleshooting completed.