DTC Diagnosis Procedure

CHECK PCV HOSE CONNECTION
Confirm that PCV hose is connected correctly.

Is the inspection result normal?

YES

GO TO 2.

NO

Repair or replace malfunctioning part.
CHECK INTAKE AIR LEAKAGE
1. Start engine and let it idle.
2. Listen for an intake air leakage after the mass air flow sensor.
Is intake air leakage detected?

YES

Discover air leakage location and repair.

NO

GO TO 3.
REPLACE ECM
1. Stop engine.
2. Replace ECM.
3. Perform additional service when replacing ECM. Refer to Work Procedure .
INSPECTION END