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Home >> Mazda >> 2021 >> 6 Touring >> Repair and Diagnosis >> Accessories & Equipment >> Collision/Avoidance >> On-Board Diagnostic - 360DEGREES View Monitor Control Module >> DTC U0401-00: Error Signal Received From Pcm [360°View Monitor Control Module] >> Diagnostic Procedure
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Diagnostic Procedure

DTC U0401:00 [360°VIEW MONITOR CONTROL MODULE] DIAGNOSTIC PROCEDURE

Step Inspection Action
1 VERIFY OTHER 360°VIEW MONITOR CONTROL MODULE DTCs
Yes Replace the 360°view monitor control module, then go to Step 4.
(See 360°VIEW MONITOR CONTROL MODULE REMOVAL/INSTALLATION .)
No Go to the next step.
2 VERIFY PCM DTCs
Yes Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [PCM (SKYACTIV-G (VIN M))] .)
(See DTC TABLE [PCM (SKYACTIV-G (VIN Y))] .)
No Go to the next step.
3 VERIFY IF MALFUNCTIONING LOCATION IS PCM DEPENDING ON REPEATABILITY
Yes Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [SKYACTIV-G (VIN M)] .)
(See PCM REMOVAL/INSTALLATION [SKYACTIV-G (VIN Y)] .)
No Go to Step 5.
4 VERIFY THAT REPAIRS HAVE BEEN COMPLETED
Yes Repeat the inspection from Step 1.

Go to the next step.
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 [360°VIEW MONITOR CONTROL MODULE] .)
No DTC troubleshooting completed.