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Evaporative Emission Control System - 2.4L: Diagnosis Kia Optima III

Testing & Diagnostics 8 illustrations ~390 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)) THROTTLE BODY CHECKING POINTS CHART - AT 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)) THROTTLE BODY CHECKING POINTS CHART - AT 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 177

Scheme 177: PCSV Inspection
Scheme 177: 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). PCSV VALVE OPERATION 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 178

Scheme 178: EVAP. Leakage Test
Scheme 178: EVAP. Leakage Test

Scheme 179

Scheme 179
Scheme 179
  1. Select "EVAP Leakage Test".
  2. Proceed with the test according to the screen introductions.

Scheme 180

Scheme 180: Removal
Scheme 180: Removal

Scheme 181

Scheme 181
Scheme 181

Scheme 182

Scheme 182
Scheme 182

Scheme 183

Scheme 183
Scheme 183
  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 (A) and the quick-connector (B).
  4. Remove the rear muffler assembly. Refer to «MUFFLER»(ref-429620-S33293827882011101500000) .
  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 auxiliary canister (A) from the canister after removing a nuts (B).

Scheme 184

Scheme 184: Inspection
Scheme 184: 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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