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Home >> Mazda >> 2021 >> CX-30 Turbo Premium >> Repair and Diagnosis >> External Pages >> Different car >> Section 70 (On-Board Diagnostic - Engine Control System (2 Of 4)) >> DTC P0455-00 Or P0456-00: Evaporative Emission System Tester >> Troubleshooting Diagnostic Procedure >> Intention of troubleshooting procedure

Intention of troubleshooting procedure

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TROUBLESHOOTING DIAGNOSTIC PROCEDURE

Step Inspection Results Action
1 PURPOSE: INSPECTION OF EVAPORATIVE GAS LEAKAGE FROM FUEL-FILLER CAP
  • Verify that the fuel-filler cap is completely closed.
  • Is the fuel-filler cap completely closed?
 Yes Go to the next step.
No Close the fuel-filler cap completely and perform the repair completion verification.
2 PURPOSE: DETERMINE INTEGRITY OF FUEL FILLER CAP
  • Inspect the fuel filler cap.
  • Is there any malfunction?
 Yes Replace the fuel filler cap and perform the repair completion verification.
No Go to the next step.
3 PURPOSE: INSPECTION OF EVAPORATIVE GAS LEAKAGE FROM EVAPORATIVE GAS PASSAGE
  • Verify the hoses between the following parts, pipe connection condition, and that there is no cracking or damage.
  • Between fuel tank and fuel tank pressure sensor
    • Between fuel tank pressure sensor and pressure control valve
  • Is there any malfunction?
 Yes Repair or replace the malfunctioning location and perform the repair completion verification.
No Go to the next step.
4 PURPOSE: INSPECTION OF EVAPORATIVE GAS LEAKAGE CAUSED BY POOR INSTALLATION OF FUEL PUMP
  • Verify the fuel pump unit installation condition (clearance between affixing surfaces, installation angle).
  • Is the fuel pump unit installed securely?
 Yes Go to the next step.
No Retighten the fuel pump unit and perform the repair completion verification.
5 PURPOSE: INSPECT FUEL TANK FOR MALFUNCTION
  • Inspect the applicable part.
  • Is the part normal?
 Yes Go to the next step.
No Repair or replace the malfunctioning location and perform the repair completion verification.
6 PURPOSE: INSPECTION OF EVAPORATIVE GAS LEAKAGE FROM EVAPORATIVE GAS PASSAGE
  • Verify the hoses between the following parts, pipe connection condition, and that there is no cracking or damage.
    • Between pressure control valve and charcoal canister main
    • Between pressure control valve and charcoal canister sub
    • Between charcoal canister main and charcoal canister sub
    • Between charcoal canister sub and CV solenoid valve
    • Between charcoal canister main and catch tank
    • Between catch tank and purge solenoid valve
      • Between purge solenoid valve and intake manifold
  • Is there any malfunction?
 Yes Repair or replace the malfunctioning location and perform the repair completion verification.
No Go to the next step.
7 PURPOSE: INSPECT PRESSURE CONTROL VALVE FOR MALFUNCTION
  • Inspect the applicable part.
  • Is the part normal?
 Yes Go to the next step.
No Repair or replace the malfunctioning location and perform the repair completion verification.
8 PURPOSE: INSPECT CHARCOAL CANISTER MAIN FOR MALFUNCTION
  • Inspect the applicable part.
  • Is the part normal?
 Yes Go to the next step.
No Repair or replace the malfunctioning location and perform the repair completion verification.
9 PURPOSE: INSPECT CHARCOAL CANISTER SUB FOR MALFUNCTION
  • Inspect the applicable part.
  • Is the part normal?
 Yes Go to the next step.
No Repair or replace the malfunctioning location and perform the repair completion verification.
10 PURPOSE: INSPECT CATCH TANK FOR MALFUNCTION
  • Inspect the applicable part.
  • Is the part normal?
 Yes Go to the next step.
No Repair or replace the malfunctioning location and perform the repair completion verification.
11 PURPOSE: INSPECT PURGE SOLENOID VALVE FOR MALFUNCTION
  • Inspect the applicable part.
  • Is the part normal?
 Yes Go to the next step.
No Repair or replace the malfunctioning location and perform the repair completion verification.
12 PURPOSE: INSPECT CV SOLENOID VALVE FOR MALFUNCTION
  • Inspect the applicable part.
  • Is the part normal?
 Yes Go to the next step.
No Repair or replace the malfunctioning location and perform the repair completion verification.
13 PURPOSE: INSPECT FUEL TANK PRESSURE SENSOR FOR MALFUNCTION
  • Inspect the applicable part.
  • Is the part normal?
 Yes Go to the next step.
No Repair or replace the malfunctioning location and perform the repair completion verification.
Repair completion verification 1 PURPOSE: VERIFY THAT VEHICLE IS REPAIRED
  • Install/connect the part removed/disconnected during the troubleshooting procedure.
  • Clear the DTC recorded in the memory. (See CLEARING DTC .)
  • Replicate the vehicle conditions at the time the DTC was detected using the following procedure.
  • Perform the DTC inspection for the PCM. (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. If the CAN communication is normal, perform the diagnosis from Step 1.
  • If the malfunction recurs, replace the PCM, then go to the next step.
No Go to the next step.
Repair completion verification 2 PURPOSE: VERIFY IF OTHER DTCs DISPLAYED
  • Perform the DTC inspection. (See DTC INSPECTION .)
  • Are any other DTCs displayed?
 Yes Repair the malfunctioning location according to the applicable DTC troubleshooting.
No DTC troubleshooting completed.
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