Hyundai Elantra (CN7): Fuel Delivery System / Fuel Pump

Hyundai Elantra (CN7) 2021-2025 Service Manual / Engine Control / Fuel System / Fuel Delivery System / Fuel Pump

Repair procedures

Inspection
[Fuel Pump]
1.
Turn ignition switch OFF and disconnect the negative (-) battery cable.
2.
Remove the fuel pump assembly.
3.
Check motor operation by fuel pump connector (A) connecting power (No.4) and ground (No.5).

Pin No
Discription
1
Fuel sender ground
2
-
3
Fuel sender signal
4
Fuel pump (+)
5
Fuel pump (-)

[Fuel Sender]
1.
Turn ignition switch OFF and disconnect the negative (-) battery cable.
2.
Remove the fuel pump assembly.
3.
Using an ohmmeter, measure the resistance between terminals 1 and 3 of sender connector (A) at each float level.

Pin No
Discription
1
Fuel sender ground
2
-
3
Fuel sender signal
4
Fuel pump (+)
5
Fuel pump (-)

4.
Also check that the resistance changes smoothly when the float is moved from "E" to "F".
Position
Resistance (Ω)
Capacity (ℓ)
E
297 - 305
2
1/2
77.4 - 81.4
25
F
14 - 16
46.1

Removal
1.
Turn the ignition switch OFF and disconnect the battery (-) terminal.
2.
Release the residual pressure in fuel line.
(Refer to Fuel Delivery System - "Release Residual Pressure in Fuel Line")
3.
Remove the rear seat.
(Refer to Body (Interior and Exterior) - "Rear Seat Assembly")
4.
Remove the fuel pump service cover (A).

5.
Disconnect the fuel pump connector (A).
6.
Disconnect the fuel feed tube quick-connector (B).

7.
Remove the locking ring (A) by using the special service tool [No. : 09310-B8100].

   
•
When removing the locking ring, be careful not to damage the fuel tank and fuel pump.
•
When removing the locking ring, press the upper area with hand and rotate the wrench counter clockwise.
8.
Remove the fuel pump from the fuel tank.

Installation
1.
Install in the reverse order of removal.
   
•
Be careful of fuel pump direction when installing. (Refer to the groove in the fuel tank)

    Repair procedures Removal1.Release the residual pressure in fuel line.(Refer to Fuel Delivery System - "Release Residual Pressure in Fuel Line")2.Turn ignition switch OFF and disconnect the negative (-) battery cable.

    Repair procedures Removal1.Remove the fuel pump. (Refer to Fuel Delivery System - "Fuel Pump")2.Disconnect the fuel pump motor connector (A) and fuel sender connector (B).

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