Hyundai Fuel Pump Module Issue
This bulletin applies to 2015-2016 Hyundai Genesis vehicles equipped with a 3.8L engine. Diagnostic Trouble Code (DTC) U0109/U010900 may be stored (lost communication with fuel pump control module). This relates to a communication error with the fuel pump control module (FPCM).
Connect global distribution system (GDS) to the data link connector (DLC).
If there are any FPCM DTC-related codes, replace the FPMC.
Using a voltmeter, check the fuel pressure sensor (FPS) output voltage. The specified voltage is 5V.
Using a voltmeter, check the FPS output voltage at idle. The specified voltage at idle is 1.4-3.2V.
Test fuel pressure at the fuel delivery line from the fuel tank. Refer to the service manual.
If FPCM is out of specification, replace the FPCM.
SERVICE PROCEDURE
Turn the ignition switch off and disconnect the battery negative terminal.
Remove the trunk rear transverse trim.
Fold the LH luggage side trim to access the FPCM.
To remove the FPCM assembly, disconnect the FPCM connector, remove the mounting nuts and remove the FPCM.
Install the new FPCM and reinstall all removed parts in reverse order of disassembly. Reconnect the battery negative terminal.
With GDS connected to the data link connector, check FPS output voltage. Specified voltage is 5V.
With engine at idle, check FPS output voltage. Specified voltage is 1.4-3.2V.
The FPCM is accessed via the left rear trunk area.
A) FPCM connector; B) mounting nuts; C) FPCM.
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Mike Mavrigian
Motor Age Editor
Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety of specialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.