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Home >> Mazda >> 2021 >> 3 Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> On-Board Diagnostic - Engine Control System (VINS 7, L, M) (2 Of 4) >> DTC P050A-00: Cold Start IAC System Performance Problem >> Troubleshooting Diagnostic Procedure >> Intention of troubleshooting procedure

Intention of troubleshooting procedure

TROUBLESHOOTING DIAGNOSTIC PROCEDURE

Step Inspection Results Action
1 PURPOSE: INSPECT INTAKE AIR SYSTEM FOR AIR SUCTION
  • Inspect the following parts of the intake air system for looseness, damage, and loss.
    • Between air cleaner and throttle body
      • Between throttle body and intake manifold
  • Is there any malfunction?
Yes Repair or replace the malfunctioning location and perform the repair completion verification.
No Go to the next step.
2 PURPOSE: DETERMINE INTEGRITY OF THROTTLE VALVE
Yes Replace the throttle body and perform the repair completion verification.
(See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [(VIN M) (US)] .)
(See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [(VIN 7 & VIN L) (US)] .)
No Clean the throttle valve and perform the repair completion verification.
(See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [(VIN M) (US)] .)
(See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [(VIN 7 & VIN L) (US)] .)
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 CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW (US) .)
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 the malfunctioning location according to the applicable DTC troubleshooting.
No DTC troubleshooting completed.