Main harness Circuit Inspection

Ignition "OFF".
Disconnect the battery (-) cable and wait at least for one minute.
Disconnect Knee Airbag -Driver connector.
Ignition "ON"
Measure signal waveform between Pin No. 1 (High) terminal of the Knee Airbag -Driver harness connector and chassis ground.
Measure signal waveform between Pin No. 2 (Low) terminal of the Knee Airbag -Driver harness connector and chassis ground.
Specification: Refer the specifications in Figure below

Fig 1: Screen Display - Signal Waveform (Low & High) Of Knee Airbag -Driver (Connector Disconnected)
Courtesy of KIA MOTORS AMERICA, INC.
Is the measured signal waveform within specifications?
YES
- Substitute a known-good SRSCM, and check for proper operation.
  If the problem is corrected, replace SRSCM and then go to "Verification of Vehicle Repair " procedure.
NO
- Substitute the SRSCM main harness and check for proper operation.
  If the problem is corrected, replace SRSCM main harness and then go to "Verification of Vehicle Repair " procedure.