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
- Perform a PCM input signal part-related inspection.
Step 2-5
- Verify if there is restriction in atmosphere release passage.
Step 6
- Perform the inspection for a purge solenoid valve stuck open.
Step 7
- Perform a unit inspection of the pressure control valve.
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: 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.
1		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) .)
2	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.
2		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) .)
3	PURPOSE: VERIFY IF THERE IS RESTRICTION BETWEEN CHARCOAL CANISTER AND ATMOSPHERE RELEASE PASSAGE Verify the following passage hoses, pipe connection condition, and that there is no restriction. Between charcoal canister main and charcoal canister sub Between charcoal canister sub and CV solenoid valve Between CV solenoid valve and atmosphere release Is there any poor connection or restriction?	Yes	Repair or replace the malfunctioning location and perform the repair completion verification.
3		No	Go to the next step.
4	PURPOSE: INSPECT CHARCOAL CANISTER MAIN FOR MALFUNCTION Inspect the applicable part. (See CHARCOAL CANISTER INSPECTION (VIN M) .) (See CHARCOAL CANISTER 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 CHARCOAL CANISTER REMOVAL/INSTALLATION (VIN M) .) (See CHARCOAL CANISTER REMOVAL/INSTALLATION (VIN L) .)
5	PURPOSE: INSPECT CHARCOAL CANISTER SUB FOR MALFUNCTION Inspect the applicable part. (See CHARCOAL CANISTER INSPECTION (VIN M) .) (See CHARCOAL CANISTER INSPECTION (VIN L) .) Is the part normal?	Yes	Go to the next step.
5		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See CHARCOAL CANISTER REMOVAL/INSTALLATION (VIN M) .) (See CHARCOAL CANISTER REMOVAL/INSTALLATION (VIN L) .)
6	PURPOSE: INSPECT PURGE SOLENOID VALVE FOR MALFUNCTION Inspect the applicable part. (See PURGE SOLENOID VALVE INSPECTION (VIN M) .) (See PURGE SOLENOID VALVE 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 PURGE SOLENOID VALVE REMOVAL/INSTALLATION (VIN M) .) (See PURGE SOLENOID VALVE REMOVAL/INSTALLATION (VIN L) .)
7	PURPOSE: INSPECT PRESSURE CONTROL VALVE FOR MALFUNCTION Inspect the applicable part. (See PRESSURE CONTROL VALVE INSPECTION (VIN M) .) (See PRESSURE CONTROL VALVE INSPECTION (VIN L) .) Is the part normal?	Yes	Go to the next step.
7		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.