Hyundai Tucson: Injector - Description
The GDI injector is similar to a standard injector, but sprays fuel at a much higher pressure directly into the combustion chamber and has a swirl disc to get the fuel swirling as it exits the nozzle. This aids in atomization of the fuel.
The ECM controls both the feed circuits (high side) to feed voltage to the injectors and the ground circuits (low side) to energize the injectors. Also, the feed for 2 injectors comes from the same driver set. As the ignition coils are paired with cylinders (1-4 and 2-3), the injectors are also set up in pairs.
Specification
Circuit Diagram
Harness Connector
Inspection
- Turn ignition switch OFF.
- Disconnect injector connector.
- Measure resistance between injector terminals 1 and 2.
- Check that the resistance is within the specification.
Specification : Refer to "Specification"
Removal
- Turn ignition switch OFF and disconnect the battery negative (-) terminal.
- Release the residual pressure in fuel line
(Refer to Fuel Delivery System - "Release Residual Pressure in Fuel Line")
WARNING
When removing the fuel pump relay, a Diagnostic Trouble Code (DTC) may occur. Delete the code with the diagnostic tool after completion of "Release Residual Pressure in Fuel Line" work.
- Remove the delivery pipe & injector assembly.
(Refer to Fuel Delivery System - "Delivery Pipe")
- Remove the connector (A) and fixing clip (B), and then separate the injector from the delivery pipe.
Installation
- Install in the reverse order of removal.
WARNING
- Do not reuse the injector fixing clip.
- Do not reuse the mounting bolt.
- Do not reuse the combustion seal (A).
- Be careful not to apply oil to the combustion seal.
- Do not reuse the O-ring (A), support disc (B), rubber washer
(C).
- When replacing the rubber washer, the steal plate part should be faced the cylinder installation part and the rubber plate part should be faced the injector body part.
- Apply engine oil to the injector O-ring.
- When inserting the injector, be careful not to damage the injector tip
- Do not reuse the high fuel pipe.
READ NEXT:
Injector - Replacement
The injector combustion seal should be replaced new one to prevent leakage
after removing the injector.
1. Remove the combustion seal (A) with a wire cutter.
WARNING
Grip the sealing ring carefully, pull it to form a small loop
and t
DPF Differential Pressure Sensor (DPS)
Description
Differential Pressure Sensor (DPS) is measure the pressure difference of EGR
inlet and outlet.
Circuit Diagram
Harness Connector
Removal
Turn the ignition swtich OFF, and then disconnect the battery negative
(-) t
Ambient Temperature Sensor (ATS)
Description
Ambient Temperature Sensor (ATS) is installed on the front-end module and
senses the ambient
temperature.
This sensor is exposed to the ambient air temperature in front of the radiator.
The ATS is a Negative Temperature Coeffici
SEE MORE:
Lane Keeping Assist Malfunction and Limitations
Lane Keeping Assist malfunction
When Lane Keeping Assist is not working
properly, the 'Check Lane Keeping Assist
(LKA) system' warning message will
appear and the yellow indicator
light will illuminate on the cluster. If this
occurs, have
System Interface
Description
Rear Corner Radar is a system that measures the relative speed and distance
from the following vehicles by using two
electromagnetic wave radar sensors attached to the rear bumper, and detects any
vehicle within the blind spot zone
Information
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- Hyundai Tucson - Fourth generation (NX4) - (2020-2023) - Workshop Manual
