Hyundai Sonata LF: Evaporative Emission Control System / Canister Repair procedures

Hyundai Sonata LF 2014-2019 Service Manual / Emission Control System / Evaporative Emission Control System / Canister Repair procedures

Removal

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

2.	Remove the fuel tank. (Refer to Engine Control / Fuel System - " Fuel Tank")

3.	Disconnect the vent hose (A).

4.	Disconnect the vapor tube quick-connector (B,C).

5.	Remove installation bolts (A) and then remove the canister assembly.

Inspection

Check for the following items visually.

A.	Cracks or leakage of the canister

B.	Loose connection, distortion, or damage of the vapor hose/tube

A: Canister - Atmosphere

B: Canister - Fuel Tank

C: Canister - Intake Manifold

Installation

1.	Install in the reverse order of removal.

Repair procedures

Inspection [System Inspection] 1. Disconnect the vapor hose from the intake manifold and connect a vacuum pump to the nipple on the intake manifold...

Fuel Filler Cap Description and Operation

Description A ratchet tightening device on the threaded fuel filler cap reduces the chances of incorrect installation, which would seal the fuel filler...

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: Power Seat Motor Repair procedures