Hyundai Sonata LF: Engine Control System / Electric WGT Control Actuator Repair procedures

Hyundai Sonata LF 2014-2019 Service Manual / Engine Control / Fuel System / Engine Control System / Electric WGT Control Actuator Repair procedures

Inspection

[Motor]

1.	Turn ignition switch OFF.

2.	Disconnect the EWGA connector.

3.	Check that the EWGA is stuck by foreign material.

4.	Measure resistance between motor (+) and (-) control terminals of the motor.

Check that the resistance is within the specification.

Specification : Refer to "Specification"

[Position Sensor]

1.	Turn ignition switch OFF.

2.	Connect the GDS to the data link connector(DLC).

Check the output voltage at each position of the EWGA position sensor on current data item within the specification.

Specification : Refer to "Specification"

Removal

1.	Turn the ignition switch OFF and disconnect the battery negative (-) cable.

2.	Lift the vehicle.

3.	Disconnect the EWGA connector (A).

4.	Remove the exhaust manifold heat protector. (Refer to Engine Mechanical System - "Exhaust Manifold")

5.	Remove the shaft link assembly (B) after removing the C-ring (A).

6.	Remove the turbo charger water pipe installation bolt (A).

Remove the EWGA after removing the bolts (B).

When carrying the turbo charger, do not hold the rod of the turbo charge to prevent bending the rod.

Installation

Install in the reverse order of removal.

Electric WGT control actuator installation :

11.8 ~ 13.7 N.m (1.2 ~ 1.4 kgf.m, 8.7 ~ 10.1 lb-ft)

Adjustment

1.	Check that the waste gate turbo charger is cool enough to work.

2.	Turn the ignition switch to OFF position.

3.	Connect the diagnostic tool to DLC connector (16 pin) under the driver side instrument panel.

Turn the ignition switch ON position.

Do not start the engine.

5.	Select VIN or Vehicle on the initial screen.

6.	Enter "Engine Control" menu after slelecting vehicle information (Vehicle model, Model year, Engine type) or entering the VIN number.

Check " Adaption value for the lower mechancal stop of EWGA" after selecting "Current Data" menu.

Specified voltage value : 4.1 ~ 4.3 V

If the voltage value measured is not within the specified voltage value, adjust the EWGA rod length. But, if no, no further procedure is required.

(1)	Loosen the rod end lock nut (A) and remove the C-ring (B).

(2)

Adjust the rod end part (C) by rotating it clockwise (D) or counterclockwise (E) to satisfy the specification.

A.	If output voltage > 4.3 V : Turn it clockwise (D)

B.	If output voltage < 4.1 V : Turn it counterclockwise (E)

Turning angle	Changing level of the adaption value (V)
0.5 turn (180°)	0.15 ~ 0.20
1 turn (360°)	0.30 ~ 0.40

9.	Install the rod end part (C) to the turbo charger lever (D) temporarily. Don't tighten the rod end lock nut (A).

10.

Turn the ignition switch ON/OFF 5 times. But hold 5 seconds at each IG ON or OFF state.

Turn the ignition switch ON/OFF repeatedly until the changing value of " Adaption value for the lower mechancal stop of EWGA" is within 0.05V.

When turning the ignition switch ON or OFF once, maximum changing level of the adaption value : Max. ± 0.05V

11.

If the voltage value measured is not within the specified voltage value, repeat 8~10 procedures untill the voltage value is within the specified voltage value.

Specified voltage value : 4.1 ~ 4.3 V

12.	Check that " Adaption value for the lower mechancal stop of EWGA" is within the specified voltage value.

13.

If it is within the specified voltage value, install the turbo charger lever (D) and the rod end part (C).

Be careful not to remove the washer (E).

14.	Tighten the rod end locking nut (A). The turbo charger lever (D) side and the rod end part (C) side should be parallel at this time.

15.	Install the C-ring (B).

Electric WGT Control Actuator Schematic Diagrams

S..

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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...

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