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Home >> Mazda >> 2021 >> CX-5 Signature >> Repair and Diagnosis >> Brakes >> Traction Control >> On-Board Diagnostic - Dynamic Stability Control System >> DTC U0405-00: ABNORMAL MESSAGE FROM PCM [DSC HU/Control Module] >> Diagnostic procedure

Diagnostic procedure

STEP INSPECTION RESULTS ACTION
1 INSPECT FOR PCM MALFUNCTION
 
Yes
Go to applicable DTC inspection.
(See DTC TABLE [PCM (VIN M)] .)
(See DTC TABLE [PCM (VIN Y)] .)
No Go to the next step.
2 VERIFY THAT THE SAME DTC IS NOT PRESENT
 
Yes
Repeat the inspection from Step 1.
If the malfunction recurs, replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [VIN M] .)
(See PCM REMOVAL/INSTALLATION [VIN Y] .)
No Go to the next step.
3 VERIFY THAT NO OTHER DTCS ARE PRESENT
  • Are any other DTCs output?
 
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [DSC HU/Control Module] .)
No DTC troubleshooting completed.