Component Inspection

Check PCV.
1. IG "OFF"
2. Disconnect PCV.
3. Check that PCV is properly operating.
4. Is the PCV O.K?
  YES
  - Go to step 2.
  NO
  - Substitute with a known-good PCV and check for proper operation.
  - If the problem is corrected, replace PCV and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Check the PCSV.
1. Ignition "OFF".
2. Disconnect PCSV and Vacuum Hose.
3. Apply vacuum on PCSV with Hand Vacuum Gauge.
4. Is the PCSV keeping the Vacuum?
  YES
  - Go to step 3.
  NO
  - Substitute with a known-good PCSV and check for proper operation. If the problem is corrected, replace PCSV and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

Check Injector.

Ignition "OFF"
Remove Injector.
Check Leakage and clog on Injector.

Measure resistance terminal 1 and 2 of Injector connector (Component side).

RESISTANCE SPECIFICATION

Temperature	Resistance [Ω]
20°C (68°F)	13.8-15.2 Ω

Fig 1: Measuring Resistance Terminal 1 And 2 Of Injector Connector

Courtesy of KIA MOTORS AMERICA, INC.

Is the measured resistance within specifications?
YES
- Go to step 4.
NO
- Substitute with a known-good Injector and check for proper operation. If the problem is corrected, replace Injector and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

Check Sensors related to Fuel Trim.
1. Check the Input Voltage of Sensors related to Fuel Trim (MAPS, TPS, ECTS, PCSV, Injector, and etc) - Refer to Trouble Shooting Guide -
2. Are the sensors related to Fuel Trim O.K?
  YES
  - Go to step 5.
  NO
  - Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Check ECM/PCM.
1. IG "OFF" and disconnect B1S2 connector.
2. Connect scan tool and Key "ON".
3. Select simulation function on scan tool.
4. Simulate voltage at terminal 2 of HO2S (B1S2) sensor signal connector.
  
  Fig 2: Scan Tool Display - Simulate Voltage Of HO2S (B1S2)
  Courtesy of KIA MOTORS AMERICA, INC.
5. Is the HO2S (B1/S2) signal value changed according to simulation voltage?
  YES
  - Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  NO
  - Substitute with a known-good ECM/PCM and check for proper operation.
  - If the problem is corrected, replace ECM/PCM and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

NOTE: There is a memory reset function on scan tool that can erase optional parts automatically detected and memorized by ECM/PCM.
Before or after testing ECM/PCM on the vehicle, use this function to reuse the ECM/PCM