Kia Optima: Fuel Delivery System / Injector

Kia Optima DL3 2019-2021 Service and Repair Manual / Engine Control / Fuel System / Fuel Delivery System / Injector

Specifications
Specification

Item
Specification
Coil Resistance (Ω)
14.5 [20°C(68°F)]

Description and operation
Description

Based on information from various sensors, the ECM can calculate the fuel amount to be injected.

The fuel injector is a solenoid-operated valve and the fuel injection amount is controlled by length of injection time.

The ECM controls each injector by grounding the control circuit. When the ECM energizes the injector by grounding the control circuit, the circuit voltage should be low (theoretically 0V) and the fuel is injected. When the ECM de-energizes the injector by opening control circuit, the fuel injector is closed and circuit voltage should momentarily peak.

Components and components location
Components

1. Clip
2. Delivery Pipe
3. Injector

Schematic diagrams
Circuit Diagram

Harness Connector

Repair procedures
Inspection
1.

In the engine control system, failure can be quickly diagnosed by using the vehicle diagnostic system (KDS).

(1)

Self diagnosis : Checking failure and code number (DTC).

(2)

Current data : Checking the system input/output data state.

(3)

Actuation test : Checking the system operation condition.

(4)

Additional function : Controlling other features including system option setting and zero point adjustment.

Components Inspection
1.

Turn the ignition switch OFF.

2.

Disconnect the injector connector.

3.

Measure resistance between the injector terminals 1 and 2.

4.

Check that the resistance is within the specification.

Specification : Refer to "Specification"

Removal
1.

Remove the injector from the delivery pipe.

(Refer to Fuel Delivery System - "Injector")

Installation
1.

Install in the reverse order of removal.

  

Note the followings when mounting the injector on the delivery pipe.

If reused the injector, replace the O-ring (A) and clip (B).

Apply engine oil to the injector O-ring.

When insert the injector, be careful not to damage the O-ring.

Delivery Pipe
Components and components location Components 1. Clip 2. Delivery Pipe 3. Injector Repair procedures Removal 1. Release ...

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