Component Inspection

Ignition "ON" & Engine "OFF".
Put and release the brake pedal several times.
Measure voltage, waveform between terminal "1" of the pressure sensor harness connector and chassis ground.
Specification : 0.2 ± 0.1V ~ 4.8 ± 0.1V

Fig 1: Measuring Voltage, Waveform Between Terminal "1" Of Pressure Sensor Connector Ground
Courtesy of KIA MOTORS AMERICA, INC.
Is the measured voltage, waveform within specifications?
YES
- Fault is intermittent caused by poor connection in pressure sensor harness and/or HECU'S connector or was repaired and HECU memory was not cleared. Go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- Substitute with a known-good pressure sensor and check for proper operation. If problem is corrected, replace pressure sensor and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.