System Inspection

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 ECM)
- 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
1) Repair as necessary and go to "Verification of Vehicle Repair" procedure
NO
1) Go to "Air Leakage Inspection" procedure
Air Leakage Inspection
1. 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
2. Was a problem found in any of the above areas?
YES
1) Repair as necessary and go to "Verification of Vehicle Repair" procedure
NO
1) Go to "Fuel Pressure Inspection" procedure
Fuel Pressure Inspection
1. Check the fuel for excessive water, alcohol or other contaminants. Replace contaminated fuel as necessary.
2. Install a fuel pressure gauge
3. Inspect fuel pressure with engine idling at normal operating temperature.
A. Specification : 338-348 kPa (3.45-3.55 kg/cm2)
4. Is the fuel pressure within the specified value?
YES
1) Go to "Fuel Injector Inspection" procedure as below
NO
1) Repair as necessary refer to inspection note as below and go to "Verification Vehicle Repair" procedure

CAUTION:
1) Check if fuel line pressure decreases when accelerating quickly
1) If it does, check fuel pump maximum pressure. If pressure is OK, check fuel line and filter for clogging
2) If fuel pressure is lower than Specification : Check for fuel line pressure while pinching fuel return hose.
1) If pressure quickly increases, check pressure regulator
2) If pressure gradually increases, check for clogging between fuel pump and pressure regulator. If hose is not clogged, check fuel pump maximum pressure.
3) If fuel pressure is higher than Specification : Is fuel line clogged?
1) If it is not, replace pressure regulator.
2) If it is, replace it

Fuel Injector Inspection
1. Ignition "OFF"
2. Check the fuel injectors for clogging or any restrictions
A. Specification : No clogging and restriction
3. Is the fuel injector OK?
YES
1) Go to "Component Inspection" procedure
NO
1) Repair as necessary and go to "Verification of Vehicle Repair" procedure