W/Harness Inspection

Check intake/exhaust system for restriction

1. Visually/physically inspect the restriction in intake/exhaust system for the following areas:
- Air cleaner filter element for excessive dirt or for any foreign objects
- Throttle body inlet for damage or for any foreign objects
- Throttle bore and throttle plate for chocking and for any foreign objects
- Restricted exhaust system
2. Inspect the leakage in EVAP. system for the following conditions:
- Check the EVAP canister for fuel saturation. If the EVAP canister is full of fuel, visually and physically inspect the EVAP and fuel system.
3. Was a problem found in any of the above areas?






Sensor Inspection

NOTE:
Refer to "Signal Waveform & Data" in the "General Information" procedure

1. Visually/physically inspect the front HO2S for the following conditions:
- Ensure that the HO2S is securely installed.
- Silicon contamination. This contamination will be indicated by a white powdery coating on the portion of the sensor exposed to the exhaust stream and this will result in a but false (high) voltage signal
- Fuel, engine coolant or oil contamination
- Use of improper sealant
- If contamination is evident on the HO2S, Fix the source of the sensor contamination before replacing the sensor to prevent future contamination. Go to "Verification of Vehicle Repair" procedure.
2. Visually/physically inspect the MAFS for the following conditions:
- Contamination or deterioration
- Poor connection or damaged harness
3. Check for an intermittent TPS1 false signal. TPS1 signal displayed on a scantool should increase steadily when depressing accelerator pedal after starting.
4. Verify that the PCM ground connections are clean and properly tightened.
5. If test result is NG, repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.
If OK, go to next step as below.

NOTE:
If the contamination is evident on the HO2S or MAFS. Fix the source of the sensor contamination before replacing the sensor to prevent future contamination.

Positive Crankcase Ventilation System Inspection

1. Check the engine oil level. The oil level should be between the min. and max. marking. Fill to the correct oil level.
2. Check crankcase ventilation valve for improper installation, damaged o-rings and malfunctioning.
3. Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure. If OK, go to next step.

Fuel System Inspection

1. Fuel Line Pressure Inspection
(1) Check the fuel for excessive water, alcohol or other contaminants. Replace contaminated fuel as necessary.
(2) Install a fuel pressure gage
(3) Inspect fuel pressure with normal idle status

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


(4) Is fuel pressure within the specified value?










2. Fuel Pressure Hold Inspection
(1) Stop the engine and check for a change in the fuel pressure gauge reading.

Specification : After engine stops, the gauge reading should hold for minimum 5 minutes


(2) Is fuel pressure within the specified value?