Component Inspection

Check improper installation of G-sensor. If NG, repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Check damage of rotor teeth or wheel bearing. If NG, repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Ignition "ON" & Engine "OFF".
Measure waveform between terminal "2" of the G sensor harness connector and chassis ground by using an oscilloscope.
Specification:

Approx. 2.5 V (standstill)

0.3 V ~ 4.7 V (acceleration or deceleration)

Fig 1: Measuring Waveform Between Terminal "2" Of G Sensor Harness Connector And Chassis Ground
Courtesy of KIA MOTORS AMERICA, INC.
Is the measured waveform fixed (standstill) and changing (acceleration or deceleration)?
YES
- Fault is intermittent caused by improper installation of G-Sensor, abnormal Rotor and wheel bearing, and/or faulty G-sensor or was repaired and HECU memory was not cleared. Go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- Substitute with a known good G-sensor and check for proper operation. If problem is corrected, replace G-sensor and go to "VERIFICATION OF VEHICLE REPAIR " procedure.