Hyundai Santa Fe: Fuel Delivery System / Fuel pressure test
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1. |
Release the residual pressure in fuel line.
(Refer to Delivery System - "Release Residual Pressure in Fuel Line")
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• |
When removing the fuel pump fuse, a Diagnostic Trouble
Code (DTC) may occur. Delete the code with the diagnostic
tool after completion of "Release Residual Pressure
in Fuel Line" work.
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2. |
Install the Special Service Tool (SST).
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(1) |
Disconnect the fuel feed tube from the delivery pipe.
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• |
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.
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(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)
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3. |
Inspect fuel leakage on connections among the fuel feed tube, the delivery
pipe, and the SST components with IG ON.
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4. |
Measure Fuel Pressure.
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(1) |
Start the engine and measure the fuel pressure at idle.
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Fuel Pressure :
330 - 370 kPa (3.4 - 3.8 kg/cm², 47.9 - 53.7 psi)
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• |
If the fuel pressure differs from the standard
value, repair or replace the related part (Refer
to the table below).
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Fuel Pressure
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Cause
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Related Part
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Too Low
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Fuel filter clogged
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Fuel Filter
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Fuel leakage
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Fuel Pressure Regulator
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Too High
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Fuel pressure regulator valve stuck
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Fuel Pressure Regulator
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(2) |
Stop the engine, and then check for the change in the fuel pressure
gauge reading.
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Standard Value : The gauge reading should hold for about
5 minutes after the engine stops
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• |
If the gauge reading should not be held, repair
or replace the related part (Refer to the table
below).
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Fuel Pressure
(After Engine Stops)
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Cause
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Related Part
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Fuel Pressure Drops Slowly
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Leakage on injector
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Injector
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Fuel Pressure Drops Immediately
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Check valve of fuel pump stuck open
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Fuel Pump
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(3) |
Turn the ignition switch OFF.
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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 diagnostic
tool after completion of "Release Residual Pressure
in Fuel Line" work.
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|
|
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6. |
Test End
|
(1) |
Remove the Special Service Tool (SST) from the fuel feed tube
and the delivery pipe.
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(2) |
Connect the fuel feed tube and the delivery pipe.
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Components Location
1. Fuel tank
2. Fuel pump
3. Fuel filter
4. Fuel pump motor
5. Fuel level sender (FLS)
6...
Release Residual Pressure
in Fuel Line
•
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...
Other information:
Replacement
[Steering column shroud upper panel]
•
Put on gloves to prevent hand injuries.
•
When removing with a flat-tip screwdriver or remover, wrap protective
tape around the tools to prevent damage to components...
Troubleshooting
Category
Error symptoms
inspection item
Detailed inspection item
Related parts
Lighting
•
HUD not working
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Lighting brightness not automatically controlled (no difference
between day and night)
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Check the lighting control
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Check the ambient light sensor operation
•
Check the CAN communication
•
Check the lighting control in the cluster USM
→ If working, HUD has no problem...
Categories
1. Inside door handle
2. Power window switches
3. Power window lock button/Electronic child safety lock button
4. Side view mirror folding button
5. Side view mirror control switch
6. Central door lock switch
7. Instrument panel illumination control switch
read more
Components and components location
Release residual pressure in fuel line