Hyundai Sonata LF: SRSCM / Front Impact Sensor (FIS) Repair procedures

Hyundai Sonata LF 2014-2019 Service Manual / Restraint / SRSCM / Front Impact Sensor (FIS) Repair procedures

Removal

•	Removal of the airbag must be performed according to the precautions/ procedures described previously.

•	Before disconnecting the front impact sensor connector, disconnect the front airbag connector(s).

•	Do not turn the ignition switch ON and do not connect the battery cable while replacing the front impact sensor.

1.	Disconnect the battery negative cable, and wait for at least three minutes before beginning work.

2.	Remove the front bumper. (Refer to Body - "Front Bumper Cover")

3.	Remove the radiator upper frame (A).

4.	Disconnect the front impact sensor connector (A).

5.	Remove the front impact sensor mounting nut.

6.	Remove the front impact sensor (B).

Installation

•	Do not turn the ignition switch ON and do not contact the battery cable while replacing the front impact sensor.

1.	Install the new front impact sensor.

Tighten the front impact sensor mounting nut.

Tightening torque :

7.8 ~ 9.8 N.m (0.8 ~ 1.0 kgf.m, 5.8 ~ 7.2 lb-ft)

3.	Connect the front impact sensor connector.

4.	Install the radiator upper frame.

5.	Reconnect the battery negative cable.

After installing the Front Impact Sensor, confirm proper system operation:

A.	Turn the ignition switch ON; the SRS indicator light should be turned on for about six seconds and then go off.

Front Impact Sensor (FIS) Components and Components Location

C..

Side Impact Sensor (SIS) Description and Operation

Description Side Impact Sensor (SIS) system consists of two P-SIS which are installed at each center of the front door module (LH and RH) and two SIS which are installed at each center pillar nearby (LH and RH)...

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: Troubleshooting

Trouble Symptom Charts Trouble Symptom 1 Trouble Symptom 2 Trouble symptomProbable causeRemedyThe 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 ECM Trouble Symptom 3 Trouble symptomProbable causeRemedyThe 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 ECM Trouble Symptom 4 Trouble symptomProbable causeRemedyThe 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 ECM Trouble Symptom 5 Trouble symptomProbable causeRemedyCannot 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 ECM Trouble Symptom 6 Trouble symptomProbable causeRemedyCannot accelerate or resume speed by using the "RES/+" switchDamaged or disconnected wiring, or short circuit, or "RES/+" switch input circuitRepair the harness or replace the "RES/+" switchMalfunction of the ECM signalsCheck input and output signals at ECM Trouble Symptom 7 Trouble symptomProbable causeRemedyCC 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 ECM Trouble Symptom 8 Trouble symptomProbable causeRemedyThe 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...

Hyundai Sonata LF 2014-2019 Service Manual: Steering Column Shroud Panel Repair procedures