2021 Mazda CX-3 AWDFACTORY OEM SERVICE PROCEDURE

Verify fuse block replacement

  1. Temporarily connect the negative battery cable to verify that the related wiring harness is not heated.
  2. Switch the ignition ON (engine off).
  3. Verify that the fuse is not blown and the related wiring harness is not heated.
  4. Perform the initial settings for the following systems:
  5. Verify DTCs using the M-MDS.
    • If a DTC is displayed, repair the malfunctioning part according to the corresponding DTC inspection.
    • After completion of repairs, clear all DTCs stored in the module.
  6. Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
  7. Start the engine and maintain the idle status.
  8. Operate all the switches of the interior/exterior lights of the vehicle and verify that all the lights illuminate and flash.
  9. Operate the audio, climate control, wiper switch, and selector lever (ATX) and verify that they operate correctly.
  10. Shift the selector lever to the P position, race the engine at approx. 3, 000 RPM from engine idling, and verify that there is no malfunction. (ATX)
  11. Perform a road test and verify that low speed, acceleration, shift-up, and shift-down conditions are normal. (ATX)
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.