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 1-3
- Perform a fuel injector control system inspection.
Step 4
- Perform an emission system parts inspection.
Step 5-7
- Perform an intake air system parts inspection.
Step 8-11
- Perform a valve timing inspection.
Step 12
- Perform an exhaust system parts inspection.
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 PUMP CONTROL MODULE FOR MALFUNCTION Inspect the applicable part. (See FUEL PUMP CONTROL MODULE INSPECTION (VIN M) .) 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 FUEL PUMP CONTROL MODULE REMOVAL/INSTALLATION (VIN M) .)
2	PURPOSE: INSPECT FUEL PUMP UNIT FOR MALFUNCTION Inspect the applicable part. (See FUEL PUMP UNIT INSPECTION (VIN M) .) 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 FUEL PUMP UNIT REMOVAL/INSTALLATION (VIN M) .)
3	PURPOSE: INSPECT FUEL INJECTOR FOR MALFUNCTION Inspect the applicable part. (See FUEL INJECTOR INSPECTION (VIN M) .) Is the part normal?	Yes	Go to the next step.
3		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See FUEL INJECTOR REMOVAL/INSTALLATION (VIN M) .)
	PURPOSE: INSPECT PURGE SOLENOID VALVE FOR MALFUNCTION Inspect the applicable part. (See PURGE SOLENOID VALVE INSPECTION (VIN M) .) Is the part normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See PURGE SOLENOID VALVE REMOVAL/INSTALLATION (VIN M) .)
5	PURPOSE: INSPECT MAF SENSOR FOR MALFUNCTION Inspect the applicable part. (See MASS AIR FLOW (MAF) SENSOR INSPECTION (VIN M) .) 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 MASS AIR FLOW (MAF) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO. 1 REMOVAL/INSTALLATION (VIN M) .)
6	PURPOSE: INSPECT AIR CLEANER ELEMENT FOR MALFUNCTION Remove the air cleaner element with the engine is running. (See AIR CLEANER ELEMENT REMOVAL/INSTALLATION (VIN M) .) Does the engine speed increase?	Yes	Inspect the air cleaner element. (See AIR CLEANER ELEMENT INSPECTION (VIN M) .) If there is any malfunction: Clean or replace the air cleaner element and perform the repair completion verification. (See AIR CLEANER ELEMENT REMOVAL/INSTALLATION (VIN M) .) If there is no malfunction: Go to the next step.
6		No	Go to the next step.
7	PURPOSE: INSPECT MAP SENSOR FOR MALFUNCTION Inspect the applicable part. (See MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR INSPECTION (VIN M) .) 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 MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO. 2 REMOVAL/INSTALLATION (VIN M) .)
8	PURPOSE: INSPECT ELECTRIC VARIABLE VALVE TIMING DRIVER FOR MALFUNCTION Inspect the applicable part. (See ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER INSPECTION (VIN M) .) Is the part normal?	Yes	Go to the next step.
8		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER REMOVAL/INSTALLATION (VIN M) .)
9	PURPOSE: INSPECT ELECTRIC VARIABLE VALVE TIMING MOTOR FOR MALFUNCTION Inspect the applicable part. (See ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER INSPECTION (VIN M) .) Is the part normal?	Yes	Go to the next step.
9		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER REMOVAL/INSTALLATION (VIN M) .)
10	PURPOSE: INSPECT ELECTRIC VARIABLE VALVE TIMING ACTUATOR FOR MALFUNCTION Inspect the applicable part. (See ELECTRIC VARIABLE VALVE TIMING ACTUATOR INSPECTION (VIN M) .) Is the part normal?	Yes	Go to the next step.
10		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See ELECTRIC VARIABLE VALVE TIMING ACTUATOR, HYDRAULIC VARIABLE VALVE TIMING ACTUATOR REMOVAL/INSTALLATION (VIN M) .)
11	PURPOSE: INSPECT OCV FOR HYDRAULIC VARIABLE VALVE TIMING SYSTEM FOR MALFUNCTION Inspect the applicable part. (See OCV FOR HYDRAULIC VARIABLE VALVE TIMING SYSTEM INSPECTION (VIN M) .) Is the part normal?	Yes	Go to the next step.
11		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See OCV FOR HYDRAULIC VARIABLE VALVE TIMING SYSTEM REMOVAL/INSTALLATION (VIN M) .)
12	PURPOSE: INSPECT A/F SENSOR FOR MALFUNCTION Inspect the applicable part. (See AIR FUEL RATIO (A/F) SENSOR INSPECTION (VIN M) .) Is the part normal?	Yes	Go to the next step.
12		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION (VIN M) .)
Repair completion verification	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. (See PCM REMOVAL/INSTALLATION (VIN M) .)
Repair completion verification		No	DTC troubleshooting completed.