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Evaporative Emission Control System - 2.0L: Diagnosis Kia Optima III

Testing & Diagnostics 7 illustrations ~380 words

System Inspection

  1. Disconnect the vapor hose from the throttle body and connect a vacuum pump to the nipple on the throttle body.
  2. Check the following points with applied vacuum using a vacuum pump. At Cold Engine (Engine Coolant Temperature < 60°C (140°F)) ENGINE OPERATING CONDITION CHART (COLD ENGINE) Engine Operating Condition Applied Vacuum Result Idle 14.5 in. Hg (0.5 kgf/cm 2 , 49.0 kPa) Vacuum is held 3, 000 RPM At Warmed Engine (Engine Coolant Temperature > 80°C (176°F)) ENGINE OPERATING CONDITION CHART (WARMED ENGINE) Engine Operating Condition Applied Vacuum Result Idle 14.5 in. Hg (0.5 kgf/cm 2 , 49.0 kPa) Vacuum is held Within 3 minutes after engine start at 3, 000 RPM Try to apply vacuum Vacuum is released In 3 minutes after engine start at 3, 000 RPM 14.5 in. Hg (0.5 kgf/cm 2 , 49.0 kPa) Vacuum will be held momentarily, after which, it will be released

Scheme 17

Scheme 17: PCSV Inspection
Scheme 17: PCSV Inspection
  1. Turn ignition switch OFF and disconnect the negative (-) battery cable.
  2. Disconnect the PCSV connector (A).
  3. Disconnect the vapor hose (B) which is connected to the intake manifold from the PCSV.
  4. After connecting a vacuum pump to the nipple, apply vacuum.
  5. With the PCSV control line grounded, check the valve operation with battery voltage applied to the PCSV (Open) and removed (Closed). BATTERY VOLTAGE REFERENCE CHART Battery Voltage Valve Vacuum Connected Open Released Disconnected Close Maintained
  6. Measure the coil resistance of the PCSV. Specifications: 19.0 ~ 22.0ohms (20°C (68°F))

Scheme 18

Scheme 18: EVAP. Leakage Test
Scheme 18: EVAP. Leakage Test

Scheme 19

Scheme 19
Scheme 19
  1. Select "EVAP Leakage Test".
  2. Proceed with the test according to the screen introductions.

Scheme 20

Scheme 20: Removal
Scheme 20: Removal

Scheme 21

Scheme 21
Scheme 21

Scheme 22

Scheme 22
Scheme 22
  1. Turn the ignition switch OFF and disconnect the battery negative (-) cable.
  2. Disconnect the ventilation hose (A) from the fuel tank air filter.
  3. Disconnect the vapor tube quick-connector (B) and the quick-connector (C).
  4. Remove the rear muffler assembly. Refer to «MUFFLER»(ref-429537-S07011392922011101500000) .
  5. Remove the protector cover (A) in the direction of arrow.
  6. Remove installation bolts and then remove the canister assembly (B).
  7. Remove the bracket (A) from the canister after removing a bolts (B).

Scheme 23

Scheme 23: Inspection
Scheme 23: Inspection
  1. Check for the following items visually. Cracks or leakage of the canister Loose connection, distortion, or damage of the vapor hose/tube Canister <--> Atmosphere Canister <--> Fuel Tank Canister <--> Intake Manifold

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