2021 Mazda CX-3 AWDFACTORY OEM SERVICE PROCEDURE

Electronic Control Throttle Operation Inspection

  1. Connect the M-MDS to the DLC-2.
  2. Perform the KOEO or KOER self test. (See KOEO/KOER SELF TEST .)
  3. Verify that none of the following DTCs are displayed:
    • P0122:00, P0123:00, P0222:00, P0223:00, P0638:00, P2101:00, P2107:00, P2109:00, P2110:00, P2112:00, P2119:00, P2122:00, P2123:00, P2127:00, P2128:00, P2135:00, P2138:00
      • If any one DTC is displayed, perform the DTC inspection. (See DTC TABLE .)
  4. Access the following PCM PIDs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST .)
    • ETC_ACT
    • ETC_DSD
  5. With the accelerator pedal not depressed and with it depressed to the floor, verify that the data monitor item ETC_ACT value changes in conjunction with the ETC_DSD value.
    • If this change cannot be verified, perform the Resistance Inspection for the throttle body. (See THROTTLE BODY INSPECTION .)
Factory Service Tools

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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.

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