K14235517

Solution K14235517
Wednesday, August 29, 2018 6:10:20 PM CEST
Mack Models
Mack Model
TE-TerraPro , LR , GR-Granite , PI-Pinnacle , AN-Anthem , CHU , CXU , GU
Volvo Models
Volvo Model
VNR , VNX , VNL , VHD , VAH
Engine family
Engine family
11L Engine , 13L Engine , MP7 , MP8
Emission Standard
Emission Standard
2018 , OBD2017 , US17 GHG
** SOLUTION **
Title
Common Rail Fuel System - Engine Wiring Harness Will Not Reach / Is Not Long
Enough To Connect To Electronic Pressure Relief Valve (EPRV) Connector, Wiring
Harness Pulled Tight At EPRV; Correct Clocking, Symptoms, Repair - US17+OBD16
And Newer Emissions, Common Model Years 2018 And Newer
When installing an Electronic Pressure Relief Valve on the fuel rail of a US17 or newer
Cause
chassis, it may be observed that the engine wiring harness is very tight after the
connector is put in place, or that the pigtail with the EPRV connector will not reach the
connector on the EPRV itself. Excessive tension on the harness or pins pulled out of
connectors may also be seen when the valve cover is removed to inspect fuel system
components.
This issue can be caused by an incorrectly oriented—or clocked—EPRV. The housing of
the EPRV is able to rotate independently of the fitting that is threaded and torqued to the
rail.
S
When installing a new Electronic Pressure Relief Valve on the Fuel Rail, or if excessive tension is observed in the
ol
wiring harness:
ut
io
A. Check the EPRV orientation
n
The EPRV should be oriented with the connector directed downward toward the cylinder head and angled slightly
toward the right side of the engine.
B. Correct the EPRV clocking if it is improperly oriented
WARNING
Tools should not be used to rotate the housing, as they may damage
the housing or connector.
Exercise caution when rotating the EPRV housing. Do not put
excessive force on the electrical connector as damage to the EPRV
may result.
1. Ensure the EPRV is tightened to correct torque specifications on the fuel rail.
2. Turn the EPRV housing by hand to rotate the connector into the correct orientation as shown in the video
below:
3. Refer to the pictures below for the correct orientation according to Engine Size:
11 Liter
Internal comments (BO)
13 Liter

Solution visibility
Dealer distribution
Function(s)/component(s) affected
Function affected
fuel supply , fuel system , wiring harness
Function Group
Function Group
237 injector and delivery pipe
Customer effect
Main customer effect
efficiency/abnormal behavior , visual appearance
Fluid implicated
fuel
Conditions
Vehicle operating mode
Frequency of occurrence of
problem
Other conditions
when stationary
random
after a workshop procedure on the vehicle
Administration
Author
RU4469V
Dealer ID
RU4469V
Last modified by
RU4469V
Creation date
25-06-2018 16:06
Date of last update
21-08-2018 20:08
Status
Published