Hyundai Accent: Fuel Delivery System / Fuel Pressure Test
1.Release the residual pressure in fuel line.(Refer to Fuel Delivery System - "Release Residual Pressure in Fuel Line")
• When removing the fuel pump fuse, a Diagnostic Trouble Code (DTC) may occur. Delete the code with the GDS after completion of "Release Residual Pressure in Fuel Line" work.
2.Install the Special Service Tool (SST).
(1)Disconnect the fuel feed tube from the delivery pipe.
• There may be some residual pressure even after “Release Residual Pressure in Fuel Line” work, so cover the hose connection with a shop towel to prevent residual fuel from spilling out before disconnecting any fuel connection.
(2)Install the special service tool for measuring the fuel pressure in between the fuel feed tube and the fuel delivery pipe (Refer to the figure below).
3. Inspect fuel leakage on connections among the fuel feed tube, the delivery pipe, and the SST components with IG ON.
4. Measure Fuel Pressure.
(1)Start the engine and measure the fuel pressure at idle.
Fuel Pressure : 323 ~ 363 kPa (3.3 ~ 3.7 kgf/cm², 46.8 ~ 52.6 psi)
• If the fuel pressure differs from the standard value, repair or replace the related part (Refer to the table below).
| Fuel Pressure | Cause | Related Part |
| Too Low | Fuel filter clogged | Fuel Filter |
| Fuel leakage | Fuel Pressure Regulator | |
| Too High | Fuel pressure regulator valve stuck | Fuel Pressure Regulator |
(2)Stop the engine, and then check for the change in the fuel pressure gauge reading.
Standard Value : The gauge reading should hold for about 5 minutes after the engine stops
• If the gauge reading should not be held, repair or replace the related part (Refer to the table below).
| Fuel Pressure (After Engine Stops) | Cause | Related Part |
| Fuel Pressure Drops Slowly | Leakage on injector | Injector |
| Fuel Pressure Drops Immediately | Check valve of fuel pump stuck open | Fuel Pump |
(3)Turn the ignition switch OFF.
5.Release the residual pressure in fuel line.(Refer to Fuel Delivery System - "Release Residual Pressure in Fuel Line")
• When removing the fuel pump fuse, a Diagnostic Trouble Code (DTC) may occur. Delete the code with the GDS after completion of "Release Residual Pressure in Fuel Line" work.
6.Test End
(1)Remove the Special Service Tool (SST) from the fuel feed tube and the delivery pipe.
(2)Connect the fuel feed tube and the delivery pipe.
Other information:
Hyundai Accent (HC) (2017 - 2022) Service Manual: SRS Control Module (SRSCM)
- Description • Supplemental Restraint System Control Module (SRSCM) determines whether and when to deploy air bag module, seat belt pretensioner (BPT). • It supplies the air bag module with the power required to deploy the module or the BPT. • It also performs self-diagnosis function of the supplemental restraint system. - Components 1.Hyundai Accent (HC) (2017 - 2022) Service Manual: Repair procedures
- Diagnosis with Diagnostic tool 1.In the body electrical system, failure can be quickly diagnosed by using the vehicle diagnostic system (Diagnostic tool).The diagnostic system (Diagnostic tool) provides the following information.(1)Fault Code Searching : Checking failure and code number (DTC) (2)Data Analysis : Checking the system input/output data state (3)Actuation test : Checking the system operation condition (4)S/W Management : Controlling other features including system option setting and zero point adjustment Data Analysis 1.
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