On-Vehicle Inspection

ON-VEHICLE INSPECTION

1. VISUALLY INSPECT 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 malfunctions.

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

2. INSPECT A/F COMPENSATION SYSTEM




a. Connect the intelligent tester to the DLC3.
1. Turn the engine switch on (IG).
2. Push the intelligent tester main switch ON.
3. Select the given menus: DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / O2S B1 S1 (O2S B2 S1, O2S B1 S2 or O2S B2 S2).

b. Warm up the heated oxygen sensor by running the engine at 2,500 rpm for approximately 2 minutes.
c. Check the displays of "O2S B1 S1" and "O2S B2 S1" with the engine speed at 2,500 rpm.

Standard condition: Displays show that each voltage fluctuates between 0 and 1 V.

The voltage changes 8 times or more in 10 seconds.

NOTE:
- Perform the check immediately after warming up the engine.
- If the voltage oscillation could not be verified, warm up the heated oxygen sensor again. If it still cannot be verified to verify, perform a DTC check.

d. Check the displays of "O2S B1 S2" and "O2S B2 S2" with the engine speed at 2,500 rpm.

Standard condition: Displays show that each voltage fluctuates between 0 and 1 V.

NOTE:
- Perform the check immediately after warming up the engine.
- If the voltage oscillation could not be verified, warm up the heated oxygen sensor again. If it still cannot be verified to verify, perform a DTC check.

3. INSPECT FUEL CUT OFF RPM
a. Increase the engine speed to 3,000 rpm.
b. Use a sound scope to check the injector operation noise.

Standard condition: When the throttle lever is released, the injector operation noise stops momentarily but starts again.

4. INSPECT LINE AND CONNECTORS
a. Visually check for loose connections, sharp bends or damage.

5. INSPECT FUEL TANK ASSEMBLY
a. Visually check for deformation, cracks or fuel leakage.

6. INSPECT FUEL CUTOFF VALVE AND FILL CHECK VALVE
a. Disconnect the vent line hose from the fuel tank.
b. Connect the pressure gauge to the fuel tank.
c. Fill the fuel tank with fuel.
d. Apply pressure of 4 kPa (41 kgf/sq.cm, 0.58 psi) to the vent port of the fuel tank.

HINT: It is necessary to check the amount of fuel in the fuel tank. When the fuel tank is full, the float valve of the fill check valve is closed and no air can pass through.

e. Remove the fuel tank cap, and check that the pressure drops.

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

f. Reconnect the vent line hose to the fuel tank.

7. INSPECT AIR INLET LINE
a. Disconnect the air inlet line hose from the charcoal canister.
b. Check that air can flow freely into the air inlet line.

If air cannot flow freely into the air inlet line, repair or replace it.

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