Kia Optima DL3 Quiz
Engine Control System/Fuel System

Injector

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
4steps
~24min
2/5difficulty
Done 0 of 4

Specifications

Specification

Item Specification
Coil Resistance (Ω) 14,5 [20 °C]

Description and Operation

Description

  • Based on information from various sensors, the ECM calculates the amount of fuel that must be injected.

  • The fuel injector is a solenoid valve, and the fuel injection quantity is controlled by the injection duration.

  • The ECM controls each injector by grounding its control circuit. When the ECM supplies power to the injector by grounding the control circuit, the circuit voltage should be low (theoretically 0 V) and fuel is injected. When the ECM de-energizes the injector by opening the control circuit, the fuel injector closes and the circuit voltage should instantly peak.

Components and Component Location

Components

1. Clip
2. Delivery Pipe		 3. Injector

Circuit Diagrams

Wiring Diagram

Harness Connector

Repair Procedures

Inspection

  1. In the engine control system, malfunctions can be quickly diagnosed using the Diagnostic System (KDS).

    1. Self-diagnosis: check for malfunction and diagnostic trouble code (DTC).

    2. Current Data: Check the system input/output status.

    3. Operation check: Check the operating status of the system.

    4. Special Function: Control of other functions, including parameter setting and zero point adjustment.

Component Inspection

  1. Turn the ignition off.

  2. Disconnect the injector connector.

  3. Measure the resistance between terminals 1 and 2 of the injector.

  4. Make sure the resistance is within specification.

    Specification: Refer to "Specifications"

Removal

  1. Remove the injector from the delivery pipe.

    (Refer to Fuel System - "Injector")

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.