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Home >> Mazda >> 2024 >> CX-30 Preferred >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (On-Board Diagnostic - Engine Control (VIN Y) (1 Of 6)) >> DTC P0015-00: Hydraulic Variable Valve Timing Control System: Over-Retarded >> Troubleshooting Diagnostic Procedure >> Intention of troubleshooting procedure

Intention of troubleshooting procedure

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P0015:00 (PCM - VIN Y) TROUBLESHOOTING DIAGNOSTIC PROCEDURE

Step Inspection Results Action
1 PURPOSE: VERIFY IF SPOOL VALVE IN OCV IS STUCK 
Yes Go to the next step.
No Replace the OCV and perform the repair completion verification 1.
(Refer to OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION (VIN Y) in the service information.)
2 PURPOSE: INSPECT ENGINE OIL LEVEL 
Yes Go to the next step.
No Add genuine engine oil and perform the repair completion verification 1.
(Refer to ENGINE OIL REPLACEMENT (VIN Y) in the service information.)
3 PURPOSE: DETERMINE INTEGRITY OF HYDRAULIC VARIABLE VALVE TIMING ACTUATOR 
Yes Replace the hydraulic variable valve timing actuator and perform the repair completion verification 1.
(Refer to ELECTRIC VARIABLE VALVE TIMING ACTUATOR, HYDRAULIC VARIABLE VALVE TIMING ACTUATOR REMOVAL/INSTALLATION (VIN Y) in the service information.)
No Go to the next step.
4 PURPOSE: VERIFY ASSEMBLY CONDITION OF TIMING CHAIN 
Yes Repair or replace the malfunctioning part.
Assemble the timing chain using the correct timing.
(Refer to TIMING CHAIN REMOVAL/INSTALLATION (VIN Y) in the service information.)
Perform the repair completion verification 1.
No Go to the next step.
5 PURPOSE: VERIFY IF FOREIGN MATTER ON EXHAUST CMP SENSOR DETECTION AREA AFFECTS DIAGNOSTIC RESULTS 
Yes Remove the foreign matter and perform the repair completion verification 1.
No Go to the next step.
6 PURPOSE: INSPECT IF INSUFFICIENT HYDRAULIC PRESSURE CAUSED BY USE OF 
UNSPECIFIED ENGINE OIL 
  • Is the specified engine oil being used?
Yes Go to the next step.
No Replace the engine oil with genuine engine oil.
(Refer to ENGINE OIL REPLACEMENT (VIN Y) in the service information.)
Perform the [ENGINE OIL DATA RESET] and perform the repair completion verification 1.
(Refer to ENGINE OIL DATA RESET (VIN Y) in the service information.)
7 PURPOSE: INSPECT ENGINE OIL PRESSURE 
Yes Go to the next step.
No Perform the repair completion verification 1.
8 PURPOSE: VERIFY IF MALFUNCTION RELATED TO ENGINE OIL LEAK OR RESTRICTION AFFECTS DIAGNOSTIC RESULTS 
  • Start the engine.
  • Verify if there is engine oil leakage in the oil passage or restriction.
  • Is there engine oil leakage in the oil passage or restriction?
Yes Repair or replace the malfunctioning part.
Add genuine engine oil and perform the repair completion verification 1.
(Refer to ENGINE OIL REPLACEMENT (VIN Y) in the service information.)
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.
  • 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 MALFUNCTION DIAGNOSIS FLOW [CONTROLLER AREA NETWORK (CAN)] .)
If the CAN communication is normal, perform the diagnosis from Step 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 or replace the malfunctioning location according to the applicable DTC troubleshooting.
No DTC troubleshooting completed.