Component Inspection

Visual Inspection
1. Visually check HO2S as follow.
  - Contamination, deformation or age of HO2S (B1/S2)
2. Is the HO2S (B1/S2) normal?
  YES
  - Go to 2 "Check performance of HO2S" as follows.
  NO
  - Substitute with a known-good HO2S (B1S2) and check for proper operation. If the problem is corrected, replace HO2S (B1S2) and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Check performance of HO2S
1. Connect scantool to DLC (Data Link Connector)
2. Warm up the engine to normal operating temperature.
3. Monitor signal waveform of HO2S with scantool.
  Specification: 0.1 ~ 0.9V.
  
  Fig 1: Signal Waveform Graph
  Courtesy of KIA MOTORS AMERICA, INC.
4. Is the HO2S (B1S2) working properly?
  YES
  - Substitute with a known-good PCM and check for proper operation. If the problem is corrected, replace PCM and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  NOTE: There is a memory reset function on scantool that can erase optional parts automatically detected and memorized by PCM.
  
  NO
  - Substitute with a known-good HO2S (B1 S2) and check for proper operation. If the problem is corrected, replace HO2S (B1S2) and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.