LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Kia >> 2002 >> Rio Base, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0446: EVAP Emission Control System Vent Circuit Malfunction, DTC P0447: EVAP Emission Control System Vent Circuit Open & DTC P0448: EVAP Emission Control System Vent Circuit Shorted >> Test Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Test Procedure

  1. Turn ignition off. Thoroughly check CCV harness connector for loose, bent, corroded, contaminated, deteriorated or damaged connector terminals. If connector and terminals are okay, go to next step. If connector terminals are faulty, repair or replace as necessary. Go to step  7 .
  2. Disconnect CCV 2-pin harness connector. Measure resistance between CCV connector terminal No. 1 and 2 (component side). Resistance should be 23-26 ohms at 68°F (20°C). If resistance is as specified, go to next step. If resistance is not as specified, temporarily install a known-good CCV and check for proper operation. If problem is corrected, replace valve. Go to step  7 .
  3. With CCV 2-pin harness connector disconnected. See Fig 1 . Turn ignition on. Measure voltage between ground and CCV connector terminal No. 2 (Red/Yellow wire). Voltage should be battery voltage. If voltage is as specified, go to step  7 . If voltage is not as specified, go to next step.
  4. Turn ignition off. Locate fuses and Main relay in engine compartment fuse/relay box. See Figure . Check Main relay operation and fuses condition. For Main relay operation test. See FUEL PUMP & MAIN RELAYS (RIO) under RELAYS & SOLENOIDS in SYSTEM & COMPONENT TESTING article. If necessary, also check Main relay circuits. See RIO in WIRING DIAGRAMS article. If fuses, relay and circuits are okay, go to next step. If fuses, relay or circuits are faulty, repair or replace as necessary. Go to step  7 .
  5. Disconnect ECM harness connector "B02". See Figure . Thoroughly check for loose, bent or corroded terminals. Measure resistance between CCV connector terminal No. 1 (Red wire) ECM connector terminals B02-20. Resistance should be below one ohm. If resistance is as specified, go to next step. If resistance is not as specified, repair open or short circuit as necessary. Go to step  7 .
  6. With CCV and ECM harness connectors disconnected, measure resistance between ground and CCV connector terminals No. 1 (Red wire). Also measure resistance in between CCV connector terminals No. 1 (Red wire) and No. 2 (Red/Yellow wire). Both resistances should be infinite. If resistances are as specified, temporarily install a Known-good CCV and check for proper operation. If problem is corrected, replace CCV. Go to next step. If any resistance is not as specified, repair open or short circuit as necessary. Go to next step.
  7. After repair, return vehicle to original condition. Clear codes using Hi-Scan Pro/Kia Data Pro Scan tool or equivalent. Verify repairs by driving vehicle and monitoring for pending codes. If DTC is set during test drive, follow appropriate DTC test procedure.
Fig 1: Identifying Canister Close Valve Connector Terminals
G00038193Courtesy of KIA MOTORS AMERICA, INC.
scientia non olet · About LEMON Manuals