System Inspection
Visual / Physical Inspection
1.

Visually/physically inspect the following items:

-Ensure that the HO2S is securely installed.

-Check for corrosion on terminals

-Check for terminal tension ( at the HO2S and at the PCM)

-Check for damaged wiring

-Check the HO2S ground circuit for a good connection

2.

Check front and rear HO2S for connections being reversed. If HO2S connections reversed, switch connections properly.

3.

Was a problem found in any of the above areas?

YES

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

NO

▶ Go to "Exhaust System Inspection" procedure.

Exhaust System Inspection
4.

Check the exhaust system for an exhaust leak near the engine.

5.

Was an exhaust leak found?

YES

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

NO

▶ Go to "Air Leakage Inspection " procedure.

Air Leakage Inspection
6.

Visually/physically inspect the following items:

-Vacuum hoses for splits, kinks and improper connections.

-Exhaust system between HO2S and Three way catalyst for air leakage

-EVAP system for leakage

-PCV hose for proper installation

7.

Was a problem found in any of the above areas?

YES

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure

NO

▶ Go to "Fuel Pressure Inspection" procedure.

Fuel Pressure Inspection
8.

Check the fuel for excessive water, alcohol, or other contaminants. Replace contaminated fuel as necessary

9.

Install a fuel pressure gage

10.

Inspect fuel pressure with engine idling at normal operating temperature.

a.

Specification : 338~348kPa(3.45~3.55kg/㎠)

11.

Is the fuel pressure within the specified value?

YES

▶ Go to "Fuel Injector Inspection" procedure as below

NO

▶ Repair as necessary refer to inspection note as below and go to "Verification of Vehicle Repair" procedure

caution

A) Check if fuel line pressure decreases when accelerating quickly.

-If it does, check fuel pump maximum pressure. If pressure is OK, check fuel line and filter for clogging.

B) If fuel pressure is lower than specification : Check for fuel line pressure while pinching fuel return hose.

-If pressure quickly increases, check pressure regulator.

-If pressure gradually increases, check for clogging between fuel pump and pressure regulator. If hose is not clogged, check fuel pump maximum pressure.

C) If fuel pressure is higher than specification : Is fuel line clogged?

-If it is not, replace pressure regulator.

-If it is, replace it.

Fuel Injector Inspection
12.

Ignition "OFF"

13.

Check the fuel injectors for clogging or any restrictions.

a.

Specification : No clogging and restriction.

14.

Is the fuel injector OK?

YES

▶ Go to "Component Inspection" procedure.

NO

▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.

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