Kia Optima DL3 Quiz
Engine Control System/Fuel System

Fuel pump module

In this manual: Engine Control System/Fuel System
General Information — 8Advanced Driver Assistance System (ADAS) — 21Maintenance — 27Engine Mechanical System — 45Engine Electrical System — 11Emission Control System — 11Engine Control System/Fuel System — 25Automatic Transmission — 20Drive Shaft and Axle — 7Suspension System — 22Steering — 7Restraints — 11Brake System — 22Body (Interior and Exterior) — 116Body Electrical System — 90Heating, Ventilation, and Air Conditioning — 32
13steps
~83min
4/5difficulty
1special tools
Done 0 of 13

Specifications

Specification

Items Specification
Current (A) Max. 6.0
Supply Voltage (V) 12
Fuel Pressure bar 3,3 - 3,7
kPa 330 - 370
kgf/cm² 3,365 - 3,772
psi 47,86 - 53,66

Fuel Sender

Position Resistance (Ω) Capacity (L)
E 297 - 305 2
1/2 80 - 84 30,7
F 14 - 16 58,3

Components and Component Location

Component

1. Service Cover
2. Plate Cover		 3. Fuel Pump Module

Repair Procedures

Inspection

  1. The fuel system can be diagnosed more quickly for malfunctions using the Kia Diagnostic System (KDS). (Refer to the Trouble Code Manual.)

    KDS provides the following information.

    1. Self-diagnosis: Checks and displays diagnostic trouble codes (DTC).

    2. Data list: Checks the input/output values of the system.

    3. Active test: Checks the operating condition of the system.

    4. Additional functions: System option control, zero point adjustment, and other functions.

Component Inspection

Fuel pump

  1. Disconnect the negative battery cable.

  2. Remove the fuel pump module.

  3. Check fuel pump operation by connecting the fuel pump connector (A) to power (4) and ground (5).

    Pin Description
    1 Fuel sensor signal (+)
    2 -
    3 Fuel sensor ground (-)
    4 Fuel pump (+)
    5 Fuel Pump (-)

Fuel Sender

  1. Disconnect the negative (-) battery terminal.

  2. Remove the fuel pump assembly.

  3. Using an ohmmeter, measure the resistance between terminals 1 and 3 of the sensor connector (A) at each float level.

    Pin Description
    1 Fuel sensor signal (+)
    2 -
    3 Fuel sensor ground (-)
    4 Fuel pump (+)
    5 Fuel Pump (-)

  4. Also check that the resistance changes smoothly as the float moves from "E" to "F".

    Position Resistance (Ω) Capacity (L)
    E 297 - 305 2
    1/2 80 - 84 30,7
    F 14 - 16 58,3

Removal

  1. Release the residual pressure in the fuel line.

    (Refer to Fuel Supply System - "Relieve Fuel Pressure")

  2. Disconnect the negative battery cable.

  3. Remove the rear seat cushion.

    (See Body - "Rear Seat Assembly")

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

  5. Disconnect the connectors (A, B, C).

    A: Fuel Pump Connector

    B: Fuel Tank Pressure Sensor Connector

    C: Fuel Feed Tube Quick Connector

  6. Remove the fuel pump after removing the plate cover (A) using the stainless steel tool (09310-B8100).

Installation

  1. Install in the reverse order of removal.

Test yourself

A quick Kia Optima DL3 quiz: every answer comes with an explanation and a link to the manual page.