Hyundai Ioniq: Rear Corner Radar System / Repair procedures

Hyundai Ioniq (AE) 2017-2025 Service Manual / Advanced Driver Assistance System (ADAS) / Rear Corner Radar System / Repair procedures

Diagnosis with GDS

1.	REAR CORENER RADAR system defects can be quickly diagnosed with the GDS. GDS operates actuator quickly to monitor, input/output value and self diagnosis.

2.	Connect the cable of GDS to the data link connector in driver side crash pad lower panel, turn the power on GDS.

3.	Select the vehicle model and then rear corner radar system.

4.	Select "Input/output Monitoring", if you want to check current data of rear corner radar system.

5.	If you want to check each module operation forcefully, select "Actuation Test".

6.	Ignition "OFF", connect GDS.

7.	Ignition "ON” & Engine "OFF", select rear corner radar system and "rear corner radar Radar Calibration" mode.

The GDS will show the rear corner radar Reset function steps.

(1)	Erase rear corner radar diagnostic codes.

(2)	rear corner radar initialization.

9.	The rear corner radar initialization procedure will be performed.

Description and operation

DescriptionRear corner radar is a system that uses two magnetic wave radar sensors attached on the rear panel to measure the distance from the following vehicles and provides the sensing and (visual and auditory) alarm of any vehicle coming into the blind spot...

Rear Corner Radar Unit. Schematic diagrams

Other information:

Hyundai Ioniq (AE) 2017-2025 Owner's Manual: Explanation of Scheduled Maintenance Items

Engine Oil and Filter The engine oil and filter should be changed at the intervals specified in the maintenance schedule. If the vehicle is being driven in severe conditions, more frequent oil and filter changes are required. Fuel Filter A clogged-up fuel filter may limit the vehicle driving speed, damage the emission system, and cause the hard starting...

Hyundai Ioniq (AE) 2017-2025 Service Manual: Troubleshooting

Trouble Symptom ChartsTrouble Symptom 1Trouble Symptom 2 Trouble symptom Probable cause Remedy The set vehicle speed varies greatly upward or downward"Surging" (repeated alternating acceleration and deceleration) occurs after settingMalfunction of the vehicle speed sensor circuitRepair the vehicle speed sensor system, or replace the partMalfunction of ECMCheck input and output signals at ECMTrouble Symptom 3 Trouble symptom Probable cause Remedy The CC system is not canceled when the brake pedal is depressedDamaged or disconnected wiring of the brake pedal switchRepair the harness or replace the brake pedal switchMalfunction of the ECM signalsCheck input and output signals at ECMTrouble Symptom 4 Trouble symptom Probable cause Remedy The CC system is not canceled when the shift lever is moved to the "N" position (It is canceled, however, when the brake pedal is depressed)Damaged or disconnected wiring of inhibitor switch input circuitRepair the harness or repair or replace the inhibitor switchImproper adjustment of inhibitor switchMalfunction of the ECM signalsCheck input and output signals at ECMTrouble Symptom 5 Trouble symptom Probable cause Remedy Cannot decelerate (coast) by using the "SET/–" switchTemporary damaged or disconnected wiring of "SET/–" switch input circuitRepair the harness or replace the "SET/–" switchMalfunction of the ECM signalsCheck input and output signals at ECMTrouble Symptom 6 Trouble symptom Probable cause Remedy Cannot accelerate or resume speed by using the "RES/+" switchDamaged or disconnected wiring, short circuit or "RES/+" switch input circuitRepair the harness or replace the "RES/+" switchMalfunction of the ECM signalsCheck input and output signals at ECMTrouble Symptom 7 Trouble symptom Probable cause Remedy CC system can be set while driving at a vehicle speed of less than 40km/h (25mph), or there is no automatic cancellation at that speedMalfunction of the vehicle-speed sensor circuitRepair the vehicle speed sensor system, or replace the partMalfunction of the ECM signalsCheck input and output signals at ECMTrouble Symptom 8 Trouble symptom Probable cause Remedy The cruise main switch indicator lamp does not illuminate (But CC system is normal)Damaged or disconnected bulb of cruise main switch indicator lampRepair the harness or replace the part...