DTC U0415:00 [ELECTRIC POWER STEERING (EPS) (E)]


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DTC U0415:00
Signal error from DSC HU/CM (without Mazda M Hybrid)/electronically controlled brake unit (with Mazda M Hybrid)
Detection condition
•  Error detected in signal from DSC HU/CM (without Mazda M Hybrid)/electronically controlled brake unit (with Mazda M Hybrid) via CAN communication
Fail-safe function
•  Refer to “Fail-safe Function Table”. (See DTC TABLE [ELECTRIC POWER STEERING (EPS) (E)].)
Possible cause
•  DSC HU/CM (without Mazda M Hybrid)/electronically controlled brake unit (with Mazda M Hybrid) malfunction
System wiring diagram
Not applicable


Diagnostic Procedure

Step

Inspection

Results

Action

1
VERIFY DSC HU/CM (WITHOUT Mazda M Hybrid)/ELECTRONICALLY CONTROLLED BRAKE UNIT (WITH Mazda M Hybrid) DTC
•  Using the M-MDS, perform the DSC HU/CM (without Mazda M Hybrid)/electronically controlled brake unit (with Mazda M Hybrid) DTC inspection.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
DTC troubleshooting completed, then perform the repair completion verification.
No
Go to the next step.
Repair completion verification
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Using the M-MDS, clear the DTC from the EPS control module.
•  Using the M-MDS, perform the EPS control module DTC inspection.
•  Is the same Pending DTC present?
Yes
Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.
If the CAN communication is normal, perform the diagnosis from Step 1.
•  If the malfunction recurs, replace the DSC HU/CM (without Mazda M Hybrid)/electronically controlled brake unit (with Mazda M Hybrid).
No
DTC troubleshooting completed.