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 1-5
- Perform an inspection of the connectors and wiring harnesses between the battery positive terminal and electric variable valve timing relay and the electric variable valve timing motor/driver.
Step 6
- Perform a unit inspection of the electric variable valve timing relay.
Step 7-9
- Perform an inspection of the electric variable valve timing drive parts.
Step 10-11
- Inspect the intake CMP sensor and CKP sensor detection areas for adhesion of foreign matter.
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 ELECTRIC VARIABLE VALVE TIMING RELAY POWER SUPPLY CIRCUIT FOR SHORT TO GROUND AND OPEN CIRCUIT Inspect the power supply circuit for an open circuit and short to ground. (See CIRCUIT INSPECTION .) Is the circuit normal?	Yes	Go to the next step.
1		No	Repair or replace the malfunctioning location and perform the repair completion verification.
2	PURPOSE: INSPECT ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER CONNECTOR FOR MALFUNCTION Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION .) Are the connector and terminal normal?	Yes	Go to the next step.
2		No	Repair or replace the malfunctioning location and perform the repair completion verification.
3	PURPOSE: INSPECT ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER POWER SUPPLY CIRCUIT FOR SHORT TO GROUND Inspect the applicable circuit for a short to ground. (See CIRCUIT INSPECTION .) Is the circuit normal?	Yes	Go to the next step.
3		No	Repair or replace the malfunctioning location and perform the repair completion verification.
4	PURPOSE: INSPECT ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT Inspect the applicable circuit for open circuit. (See CIRCUIT INSPECTION .) Is the circuit normal?	Yes	Go to the next step.
4		No	Repair or replace the malfunctioning location and perform the repair completion verification.
5	PURPOSE: INSPECT PCM CONNECTOR FOR MALFUNCTION Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION .) Are the connector and terminal normal?	Yes	Go to the next step.
5		No	Repair or replace the malfunctioning location and perform the repair completion verification.
6	PURPOSE: INSPECT ELECTRIC VARIABLE VALVE TIMING RELAY FOR MALFUNCTION Inspect the applicable part. (See RELAY INSPECTION .) 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 RELAY LOCATION (US) .)
7	PURPOSE: INSPECT ELECTRIC VARIABLE VALVE TIMING MOTOR FOR MALFUNCTION Inspect the applicable part. (See ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER INSPECTION (VIN M) .) (See ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER 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 ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER REMOVAL/INSTALLATION (VIN M) .) (See ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER REMOVAL/INSTALLATION (VIN L) .)
8	PURPOSE: INSPECT ELECTRIC VARIABLE VALVE TIMING ACTUATOR FOR MALFUNCTION Inspect the applicable part. (See ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER INSPECTION (VIN M) .) (See ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER INSPECTION (VIN L) .) 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 ACTUATOR, HYDRAULIC VARIABLE VALVE TIMING ACTUATOR REMOVAL/INSTALLATION (VIN M) .) (See ELECTRIC VARIABLE VALVE TIMING ACTUATOR, HYDRAULIC VARIABLE VALVE TIMING ACTUATOR REMOVAL/INSTALLATION (VIN L) .)
9	PURPOSE: VERIFY ASSEMBLY CONDITION OF TIMING CHAIN Verify the condition of the timing chain assembly (intake valve timing, looseness, jumping). (See TIMING CHAIN REMOVAL/INSTALLATION (VIN M) .) (See TIMING CHAIN REMOVAL/INSTALLATION (VIN L) .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part. Assemble the timing chain using the correct timing. (See TIMING CHAIN REMOVAL/INSTALLATION (VIN M) .) (See TIMING CHAIN REMOVAL/INSTALLATION (VIN L) .) Go to repair completion verification.
9		No	Go to the next step.
10	PURPOSE: VERIFY IF FOREIGN MATTER ON INTAKE CMP SENSOR DETECTION AREA AFFECTS DIAGNOSTIC RESULTS Visually inspect for intake CMP sensor. (See CAMSHAFT POSITION (CMP) SENSOR INSPECTION (VIN M) .) (See CAMSHAFT POSITION (CMP) SENSOR INSPECTION (VIN L) .) Is there foreign matter such as metallic dust on the intake CMP sensor detection area?	Yes	Remove the foreign matter and perform the repair completion verification.
10		No	Go to the next step.
11	PURPOSE: VERIFY IF FOREIGN MATTER ON CKP SENSOR DETECTION AREA AFFECTS DIAGNOSTIC RESULTS Visually inspect for CKP sensor. (See CRANKSHAFT POSITION (CKP) SENSOR INSPECTION (VIN M) .) (See CRANKSHAFT POSITION (CKP) SENSOR INSPECTION (VIN L) .) Is there foreign matter such as metallic dust on the CKP sensor detection area?	Yes	Remove the foreign matter and perform the repair completion verification.
11		No	Go to the next step.
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.