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Home >> Mazda >> 2022 >> MX-5 Miata RF Club >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> On-Board Diagnostics - Electric Vacuum Pump (EVP) >> DTC U0415-00/U0415-29/U0415-86: Can Communication - Signal Error [EVP Control Unit] >> Diagnostic Procedure

Diagnostic Procedure

DTC U0415:00/U0415:29/U0415:86 (EVP CONTROL UNIT) DIAGNOSTIC PROCEDURE

Step INSPECTION Action
1 VERIFY DSC HU/CM DTC 
Yes Go to the applicable DTC inspection. (See DTC TABLE [DSC HU/CM] .) DTC troubleshooting completed, then go to the next Step.
No Go to the next Step.
2 VERIFY DTC TROUBLESHOOTING COMPLETED
Yes Repeat the inspection from Step 1. If the malfunction recurs, replace the DSC HU/CM, then go to the next Step. (See DSC HU/CM REMOVAL/INSTALLATION .)
No Go to the next Step.
3 VERIFY NO DTC IS PRESENT
  • Are any DTCs present?
Yes Go to the applicable DTC inspection. (See DTC TABLE [EVP CONTROL UNIT] .)
No DTC troubleshooting completed.