Intention of troubleshooting 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.

Step 1
- Visually verify that there are no traces of freezing on the fuel tank pressure sensor.
Step 2-3
- Inspect the charcoal canister for clogging.
Step 4
- Perform a unit inspection of the CV solenoid valve.
Step 5
- Verify that there is no breakage or clogging in the evaporative hose.
Step 6
- Perform a unit inspection of the fuel tank pressure sensor.
Repair completion verification
- Verify that the primary malfunction is resolved and there are no other malfunctions.

TROUBLESHOOTING DIAGNOSTIC PROCEDURE

Step	Inspection	Results	Action
1	PURPOSE: VISUALLY VERIFY THAT THERE ARE NO TRACES OF FREEZING ON THE FUEL TANK PRESSURE SENSOR Visually inspect for fuel tank pressure sensor. Can traces of freezing be verified on the fuel tank pressure sensor?	Yes	Evaporative gas freezes when the ambient temperature is low, and it is highly possible that the fuel tank pressure sensor measurement is affected because the vehicle was not refueled appropriately. Replace the fuel and perform the repair completion verification.
1		No	Go to Step 6.
2	PURPOSE: INSPECTION OF CHARCOAL CANISTER MAIN FOR CLOGGING Inspect for clogging in the charcoal canister main. (See CHARCOAL CANISTER INSPECTION (VIN M) .) (See CHARCOAL CANISTER INSPECTION (VIN L) .) Is there any malfunction?	Yes	Replace the charcoal canister main and perform the repair completion verification. (See CHARCOAL CANISTER REMOVAL/INSTALLATION (VIN M) .) (See CHARCOAL CANISTER REMOVAL/INSTALLATION (VIN L) .)
2		No	Go to the next step.
3	PURPOSE: INSPECTION OF CHARCOAL CANISTER SUB FOR CLOGGING Inspect for clogging in the charcoal canister sub. (See CHARCOAL CANISTER INSPECTION (VIN M) .) (See CHARCOAL CANISTER INSPECTION (VIN L) .) Is there any malfunction?	Yes	Replace the charcoal canister sub and perform the repair completion verification. (See CHARCOAL CANISTER REMOVAL/INSTALLATION (VIN M) .) (See CHARCOAL CANISTER REMOVAL/INSTALLATION (VIN L) .)
3		No	Go to the next step.
4	PURPOSE: INSPECT CV SOLENOID VALVE FOR MALFUNCTION Inspect the applicable part. (See CANISTER VENT (CV) SOLENOID VALVE INSPECTION (VIN M) .) (See CANISTER VENT (CV) SOLENOID VALVE INSPECTION (VIN L) .) Is the part normal?	Yes	Go to the next step.
4		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See CANISTER VENT (CV) SOLENOID VALVE REMOVAL/INSTALLATION (VIN M) .) (See CANISTER VENT (CV) SOLENOID VALVE REMOVAL/INSTALLATION (VIN L) .)
5	PURPOSE: INSPECTION OF EVAPORATIVE HOSE FOR BREAKAGE OR CLOGGING Inspect for breakage or clogging in the evaporative hose (hose between CV solenoid valve and atmosphere). Is there any malfunction?	Yes	Repair or replace the malfunctioning location and perform the repair completion verification.
5		No	Go to the next step.
6	PURPOSE: INSPECT FUEL TANK PRESSURE SENSOR FOR MALFUNCTION Inspect the applicable part. (See FUEL TANK PRESSURE SENSOR INSPECTION (VIN M) .) (See FUEL TANK PRESSURE SENSOR INSPECTION (VIN L) .) Is the part normal?	Yes	Go to the next step.
6		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See PRESSURE CONTROL VALVE REMOVAL/INSTALLATION (VIN M) .) (See PRESSURE CONTROL VALVE REMOVAL/INSTALLATION (VIN L) .)
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. Implement the repeatability verification procedure. (See REPEATABILITY VERIFICATION 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. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW (US) .) 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. (See PCM REMOVAL/INSTALLATION (VIN M) .) (See PCM REMOVAL/INSTALLATION (VIN L) .)
Repair completion verification 1		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.
Repair completion verification 2		No	DTC troubleshooting completed.