Troubleshooting Diagnostic Procedure

WARNING: This page is about a different car, the 2016 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.

Intention of troubleshooting procedure

Step 1-2
- Inspect for evaporative gas leakage from the fuel-filler opening.
Step 3-6
- Inspect for evaporative gas leakage from the fuel tank side.
Step 7-9
- Inspect for evaporative gas leakage from the charcoal canister side.
Step 10-12
- Inspect control parts for normal operation.
Step 13-14
- Verify that the primary malfunction is resolved and there are no other malfunctions.

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.
1		No	Close the fuel-filler cap completely, then go to Step 13.
2	PURPOSE: DETERMINE INTEGRITY OF FUEL FILLER CAP Inspect the fuel filler cap. Is there any malfunction?	Yes	Replace the fuel filler cap, then go to Step 13. (See FUEL-FILLER PIPE REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
2		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 pressure control valve Between pressure control valve and charcoal canister Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 13.
3		No	Go to the next step.
4	PURPOSE: DETERMINE INTEGRITY OF PRESSURE CONTROL VALVE Inspect the pressure control valve. (See PRESSURE CONTROL VALVE INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Is there any malfunction?	Yes	Replace the pressure control valve, then go to Step 13. (See FUEL TANK REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
4		No	Go to the next step.
5	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). (See FUEL PUMP UNIT REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Is the fuel pump unit installed securely?	Yes	Go to the next step.
5		No	Retighten the fuel pump unit, then go to Step 13. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
6	PURPOSE: DETERMINE INTEGRITY OF FUEL TANK Inspect the fuel tank. (See FUEL TANK INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Is there any malfunction?	Yes	Replace the fuel tank, then go to Step 13. (See FUEL TANK REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
6		No	Go to the next step.
7	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 charcoal canister and catch tank Between charcoal canister and CV solenoid valve Between catch tank and purge solenoid valve Between purge solenoid valve and intake manifold Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 13.
7		No	Go to the next step.
8	PURPOSE: DETERMINE INTEGRITY OF CHARCOAL CANISTER Inspect the charcoal canister. (See CHARCOAL CANISTER INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Is there any malfunction?	Yes	Replace the charcoal canister, then go to Step 13. (See CHARCOAL CANISTER REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
8		No	Go to the next step.
9	PURPOSE: DETERMINE INTEGRITY OF CATCH TANK Inspect the catch tank. (See CATCH TANK INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Is there any malfunction?	Yes	Replace the catch tank, then go to Step 13. (See PURGE SOLENOID VALVE REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
9		No	Go to the next step.
10	PURPOSE: DETERMINE INTEGRITY OF PURGE SOLENOID VALVE Inspect the purge solenoid valve. (See PURGE SOLENOID VALVE INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Is there any malfunction?	Yes	Replace the purge solenoid valve, then go to Step 13. (See PURGE SOLENOID VALVE REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
10		No	Go to the next step.
11	PURPOSE: DETERMINE INTEGRITY OF CV SOLENOID VALVE Inspect the CV solenoid valve. (See CANISTER VENT (CV) SOLENOID VALVE INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Is there any malfunction?	Yes	Replace the CV solenoid valve, then go to Step 13. (See QUICK RELEASE CONNECTOR (EMISSION SYSTEM) REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
11		No	Go to the next step.
12	PURPOSE: DETERMINE INTEGRITY OF FUEL TANK PRESSURE SENSOR Inspect the fuel tank pressure sensor. (See FUEL TANK PRESSURE SENSOR INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Is there any malfunction?	Yes	Replace the charcoal canister, then go to the next step. (See CHARCOAL CANISTER REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
12		No	Go to the next step.
13	PURPOSE: VERIFICATION OF VEHICLE REPAIR COMPLETION Reconnect all the removed parts. Clear the DTC from the PCM memory using the M-MDS. (See CLEARING DTC [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Implement the repeatability verification procedure. (See REPEATABILITY VERIFICATION PROCEDURE .) Perform the DTC Reading Procedure. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Is the same DTC present?	Yes	Repeat the inspection from Step 1 of the troubleshooting diagnostic procedure. If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Go to the next step.
13		No	Go to the next step.
14	PURPOSE: VERIFY IF THERE IS ANY OTHER MALFUNCTION Is any other DTC or pending code stored?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
14		No	DTC troubleshooting completed.