Component Inspection

Check HO2S (B1/S1) Heater resistance.

IG "OFF" and disconnect HO2S (B1/S1) connector.

Measure resistance between terminal 1 and 2 of HO2S (B1/S1)connector (Component Side)

SPECIFICATION:

HEATER SPECIFICATION

Heater
Resistance (Ω)	8.1 ~ 11.1 Ω at 21°C (69.8°F)

Fig 1: Measuring Resistance Between Terminal 1 And 2 Of HO2S

G04884338

Courtesy of HYUNDAI MOTOR CO.

Is the measured resistance within specification?
YES
- Substitute with a known - good PCM and check for proper operation. If the problem is corrected, replace PCM and 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.
Before or after testing PCM on the vehicle, use this function to reuse the PCM on the others.

NO
- Substitute with a known - good HO2S (B1/S1) and check for proper operation. If the problem is corrected, replace HO2S (B1/S1) and go to "VERIFICATION OF VEHICLE REPAIR " procedure.