Hyundai Sonata: Fuel Delivery System / Fuel Pump Repair procedures

Hyundai Sonata LF 2014-2019 Service Manual / Engine Control / Fuel System / Fuel Delivery System / Fuel Pump Repair procedures

Inspection

[Fuel sender]

1.	Turn the ignition switch OFF, and then remove battery (-) cable.

2.	Remove the fuel pump assembly.

Using an ohmmeter, measure the resistance between terminals 1 and 6 of sender connector (A) at each float level.

Pin No.	Description
1	Fuel sender ground
2	Fuel pressure sensor (FPS) signal input
3	CAN [High]
4	Fuel pressure sensor (FPS) power supply (+5V)
5	Fuel pressure sensor (FPS) ground (-)
6	Fuel sender signal
7	-
8	CAN [Low]
9	Ground
10	Battery power (B+)

Also check that the resistance changes smoothly when the float is moved from "E" to "F".

[ Analog cluster type]

Posion	Resistance (?)	Capacity (?)
E	298 ~ 305	3
1/2	80 ~ 84	35.7
F	14 ~ 16	68.6

[Digital cluster type]

Posion	Resistance (?)	Capacity (?)
E	298 ~ 305	3
1/2	80 ~ 84	35.7
F	14 ~ 16	68.6

Removal

1.	Release the residual pressure in fuel line. (Refer to the Fuel Delivery System - "Release Residual Pressure in Fuel Line")

2.	Lift the vehicle.

3.	Support the fuel tank with a jack.

4.	Pull fuel tank in direction of a down by loosening the mounting nut (A) appropriately.

5.	Remove the rear seat cushion. (Refer to Body - "Rear Seat Assembly")

6.	Remove the fuel pump service cover (A).

7.	Disconnect the fuel pump control module connector (A).

8.	Disconnect the fuel feed tube quick-connector (B).

9.	Disconnect the fuel pressure sensor connector (C).

10.	Remove the locking ring (A) by using the special service tool (B) [No.: 09310-B9100].

11.	Remove the fuel pump from the fuel tank.

Installation

Install in the reverse order of removal.

Be careful of fuel pump direction (Refer to the groove in the fuel tank).

Fuel pump plate cover installation bolt :

2.0 ~ 2.9 N.m (0.2 ~ 0.3 kgf.m, 1.4 ~ 2.2 lb-ft)

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