Component Inspection

■ Upstream O2 Sensor Inspection 

1. Ignition "OFF"
2. Connect VMI to KDS/GDS and set up an oscilloscope as follow (4-channel);

   Channel A (+): Pin No. 2 (V_N) terminal of Upstream O2 Sensor.

   Channel A (-): Pin No. 1 (V_G) terminal of Upstream O2 Sensor.

   Channel B (+): Pin No. 3 (V_IP) terminal of Upstream O2 Sensor.

   Channel B (-): Pin No. 5 (V_RC) terminal of Upstream O2 Sensor.

3. Ignition "ON" & Engine "ON"
   Fig 1: Scantool Display - Engine Idle After Warm Up

   Courtesy of KIA MOTORS AMERICA, INC.
4. Is measured value within specification?

   YES 

   • Carefully re-do this troubleshooting guide steps.
   • If the diagnostics have been performed correctly with no failure found, replace the ECM/PCM and then go to "Verification of Vehicle Repair " procedure.
     CAUTION: When replacing the ECM/PCM, the vehicle equipped with the immobilizer must be performed procedure as below.
     [In the case of installing used ECM/PCM]
     

     1. Perform "ECM/PCM Neutral mode" procedure with KDS/GDS. (Refer to IMMOBILIZER SYSTEM )
     2. After finishing "ECM/PCM Neutral mode", perform "Key teaching" procedure with KDS/GDS. (Refer to IMMOBILIZER SYSTEM )

     
     [In the case of installing new ECM/PCM]
     Perform "Key teaching" procedure with KDS/GDS. (Refer to IMMOBILIZER SYSTEM )
     CAUTION: When replacing the ECM/PCM, the vehicle equipped with the smart key system (Button start) must be performed procedure as below.
     [In the case of installing used ECM/PCM]
     

     1. Perform "ECM/PCM Neutral mode" procedure with KDS/GDS. (Refer to "SMART KEY ")
     2. After finishing "ECM/PCM Neutral mode", insert the key (or press the start button) and turn it to the IGN ON and OFF position. Then the PCM learns the smart key information automatically.

     
     [In the case of installing new ECM/PCM]
     Insert the key (or press the start button) and turn it to the IGN ON and OFF position. Then the ECM/PCM learns the smart key information automatically.

   NO 

   • Carefully re-do this troubleshooting guide steps.
   • If no problems were found with the circuits or connectors, Replace the Upstream O2 Sensor and then go to "Verification of Vehicle Repair " procedure.
     CAUTION:

     • Install the component with the specified torques.
     • Note that internal damage may occur when the component is dropped or mistreated.
     CAUTION:

     • DO NOT use a cleaner, spray, or grease to sensing element and connector of the sensor because oil component in them may cause malfunction or affects on sensor performance.
     • Sensor and its wiring may be damaged in case of contacting with the exhaust system (Exhaust Manifold, Catalytic Converter, and others).