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Home >> Mazda >> 2021 >> CX-30 Turbo Premium >> Repair and Diagnosis >> External Pages >> Different car >> Section 84 (On-Board Diagnostic - Electric Power Steering (EPS) System) >> DTC U0415-00: Signal Error From DSC HU/Cm (Electric Power Steering (EPS) (Us)) >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.
DTC U0415:00 (ELECTRIC POWER STEERING (EPS) (US)) DIAGNOSTIC PROCEDURE

Step Inspection Results Action
1 VERIFY DSC HU/CM DTC
  • Using the M-MDS, perform the DSC HU/CM DTC inspection. (See DTC INSPECTION .)
  • Are any DTCs present?
 Yes Go to the applicable DTC inspection.
(See DTC TABLE [DSC HU/CM (US)] .)
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. (See CLEARING DTC .)
  • Using the M-MDS, perform the EPS control module DTC inspection. (See 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. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW (US) .)
If the CAN communication is normal, perform the diagnosis from Step 1.
No DTC troubleshooting completed.
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