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 inspection of engine oil leakage.
Step 2
- Perform inspection of engine oil level.
Step 3
- Inspect for clogging of the oil passage to the engine oil level sensor detection area.
Step 4-5
- Perform an inspection of LIN communication line.
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 ENGINE OIL LEAKAGE Start the engine. Verify that there is no engine oil leakage in the hydraulic circuit. Is there any leakage?	Yes	Repair or replace the malfunctioning location, then add genuine motor oil. (See ENGINE OIL REPLACEMENT (VIN M) .) (See ENGINE OIL REPLACEMENT (VIN L) .) Perform the "ENGINE OIL DATA RESET" and perform the repair completion verification. (See ENGINE OIL DATA RESET (VIN M) .) (See ENGINE OIL DATA RESET (VIN L) .)
1		No	Replace the engine oil level sensor, then go to the next step. (See ENGINE OIL LEVEL SENSOR REMOVAL/INSTALLATION (VIN M) .) (See ENGINE OIL LEVEL SENSOR REMOVAL/INSTALLATION (VIN L) .)
2	PURPOSE: INSPECT ENGINE OIL LEVEL Inspect the engine oil level. (See ENGINE OIL LEVEL INSPECTION (VIN M) .) (See ENGINE OIL LEVEL INSPECTION (VIN L) .) Is the engine oil level sufficient?	Yes	Go to the next step.
2		No	Add genuine motor oil. (See ENGINE OIL REPLACEMENT (VIN M) .) (See ENGINE OIL REPLACEMENT (VIN L) .) Perform the "ENGINE OIL DATA RESET" and perform the repair completion verification. (See ENGINE OIL DATA RESET (VIN M) .) (See ENGINE OIL DATA RESET (VIN L) .)
3	PURPOSE: INSPECT FOR CLOGGING OF THE OIL PASSAGE TO THE ENGINE OIL LEVEL SENSOR DETECTION AREA Remove the engine oil level sensor. (See ENGINE OIL LEVEL SENSOR REMOVAL/INSTALLATION (VIN M) .) (See ENGINE OIL LEVEL SENSOR REMOVAL/INSTALLATION (VIN L) .) Visually inspect the oil passage to the engine oil level sensor. Is there any restriction detected?	Yes	Clean the oil passage and perform the repair completion verification.
3		No	Go to the next step.
4	PURPOSE: INSPECT ENGINE OIL LEVEL SENSOR CONNECTOR FOR MALFUNCTION Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION .) Are the connector and terminal normal?	Yes	Go to the next step.
4		No	Repair or replace the malfunctioning location and perform the repair completion verification.
5	PURPOSE: INSPECT LIN COMMUNICATION LINE FOR OPEN CIRCUIT Inspect the applicable circuit for open circuit. (See CIRCUIT INSPECTION .) Is the circuit normal?	Yes	Replace the engine oil level sensor and perform the repair completion verification. (See ENGINE OIL LEVEL SENSOR REMOVAL/INSTALLATION (VIN M) .) (See ENGINE OIL LEVEL SENSOR REMOVAL/INSTALLATION (VIN L) .)
5		No	Repair or replace the malfunctioning location and perform the repair completion verification.
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.