On-Vehicle Inspection

ON-VEHICLE INSPECTION




1. VISUALLY CHECK HOSES, CONNECTORS AND GASKETS

a. Check that there are no cracks, leaks or damage.

NOTE:
- Detachment or other problems with the engine oil dipstick, filler cap, PCV hose and other components may cause the engine to run improperly.
- Disconnection, looseness or cracks in the parts of the air induction system between the throttle body and cylinder head will allow air suction and cause an engine failure or engine failure malfunctions.

If the result is not as specified, replace parts as necessary.

2. CHECK FUEL CUT OFF RPM
a. Start and warm up the engine.
b. Open the throttle valve and keep the engine speed at 3,000 rpm.
c. Use a sound scope to check for injector operating noise.
d. Check that when the accelerator pedal is released, injector operation noise stops momentarily and then resumes. If the result is not specified, check the injector, wiring and ECM.

3. CHECK LINE AND CONNECTORS
a. Visually check for loose connections, sharp bends or damage.

4. CHECK FUEL TANK ASSEMBLY
a. Visually check for deformations, cracks or fuel leakage.

5. CHECK FUEL TANK AND VENT LINE




a. Disconnect the vent line tube from the canister.
b. Connect the pressure gauge to the vent line tube.
c. Apply 4 kPa (41 kgf/sq.cm, 30 mmHg) of pressure to the vent line of the fuel tank.

HINT: Perform this inspection with the fuel tank less than 90% full. When the fuel tank is full, the fuel cutoff valve closes and pressure is released through the 1.5 mm orifice. As a result, when the fuel tank cap is removed, pressure does not decrease smoothly.

d. Check that the fuel tank pressure is maintained for some time, and does not decrease immediately.

HINT: If pressure decreases immediately, one of the following may be the cause:
- The fuel tank cap is not completely tightened.
- The fuel tank cap is damaged.
- Air is leaking from the vent line.
- The fuel tank is damaged.

e. When the fuel tank cap is removed, check that pressure is released smoothly.

HINT: If the pressure does not drop, replace the fuel tank assembly.

f. Reconnect the vent line tube to the canister.

6. CHECK AIR INLET LINE
a. Disconnect the air inlet line hose from the canister.
b. Check that air flows freely into the air inlet line.

HINT: If air does not flow freely into the air inlet line, repair or replace it.

c. Reconnect the air inlet line hose to the canister.

7. CHECK PRESSURE SENSOR




a. Turn the ignition switch to the ON position.
b. Measure the voltage between terminals E8-32 (AIP) and E8-28 (E2) of the ECM connector.

Standard voltage: 1.0 to 2.2 V

If the result is not as specified, inspect the ECM and harness.

8. CHECK VACUUM SWITCHING VALVE (for Air Injection System)




a. Disconnect the VSV connector.
b. Disconnect the 2 vacuum hoses from the VSV.







c. Measure the resistance between the terminals.

If the resistance is not as specified, replace the VSV.




d. Apply air to the port shown in the illustration.
e. Check that air does not flow from port A. If the result is not as specified, replace the VSV.




f. Apply positive battery voltage to the terminals, apply air to the port, and check that air flows from the port shown in the illustration. If the result is not as specified, replace the VSV.
g. Connect the 2 vacuum hoses to the VSV.

NOTE: Be sure to connect the vacuum hoses correctly.

h. Connect the VSV connector.
i. Perform all procedures on the other VSV.




9. CHECK NO. 2 AIR SWITCHING VALVE
a. Disconnect the vacuum hose from the VSV (for air injection system).
b. Apply vacuum of 30 kPa (306 kgf/sq.cm, 4.35 psi) to vacuum hose, and check that the vacuum does not decrease. If the operation is not as specified, replace the No. 2 air switching valve.




c. Release the vacuum, and check that the operation sound is emitted from the No. 2 air switching valve. If the operation is not as specified, replace the No. 2 air switching valve.
d. Perform all procedures on the other No. 2 air switching valve.