Monitor GDS Data

Connect GDS to Data Link Connector (DLC).
Engine start and drive the vehicle on the road.
Substitute with a known - good AFLS ECU and check for proper operation. If the problem is corrected, replace AFLS ECU and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Specification: Be changed according to driving condition.

Fig 1: Display - Vehicle Speed Current Data
Courtesy of HYUNDAI MOTOR AMERICA

Engine ON, 10MPH status after starting - AFLS Current Data(Vehicle Speed), refer to Fig 1.
Is parameter displayed within specifications?
YES
- Fault is intermittent caused by poor contact in the sensor's and/or AFLS ECU's connector or was repaired and AFLS ECU memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- Faulty in vehicle speed sensor.
  → Check the Wheel speed sensor and ABS (ESC) system and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
- Faulty in only AFLS ECU signal.
  → Go to "VERIFICATION OF VEHICLE REPAIR " procedure.