Monitor GDS Data

Ignition "ON" & Engine "OFF"
Connect GDS and clear the "Diagnostic Trouble Codes (DTC) ".

Fig 1: Screen Display - DTC Description
Courtesy of HYUNDAI MOTOR AMERICA
Is DTC P1679 displayed again?
YES
- Fault is intermittent caused by poor contact in ICU's and/or PCM/ECM connector or was repaired and PCM/ECM memory was not cleared. Therefore, Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- Substitute with a known-good ICU and/or PCM/ECM and check for proper operation and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
- After replacing ICU and/or PCM/ECM, perform Key teaching procedure with GDS.