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Home >> Mazda >> 2016 >> 6 Touring, Automatic Trans >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> On-Board Diagnostic - Instrument Cluster >> DTC U0405-00: Error Signal Received From Radar Unit >> Diagnostic Procedure

Diagnostic Procedure

Step Inspection Action
1 VERIFY RADAR UNIT DTCs 
Yes Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [RADAR UNIT] .)
No Go to the next step.
2 PERFORM DTC INSPECTION AND VERIFY RADAR UNIT MALFUNCTION 
Yes Replace the radar unit, then go to the next step.
(See RADAR UNIT REMOVAL/INSTALLATION .)
No Go to Step 4.
3 VERIFY THAT REPAIRS HAVE BEEN COMPLETED 
Yes Repeat the inspection from Step 1.

Go to the next step.
No Go to the next step.
4 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 [INSTRUMENT CLUSTER] .)
No DTC troubleshooting completed.