ITB18-024

Reference:
Date:
ITB18-024
July 10, 2018
VOLUNTARY SERVICE CAMPAIGN
Q50 AND Q60 WITH 2.0L ENGINE; LOW PRESSURE FUEL LINE
CAMPAIGN ID #:
P8314
APPLIED VEHICLES: 2016-2018 Q50 (V37)
2017-2018 Q60 (V37)
APPLIED ENGINE: 2.0L Turbo Gasoline Engine
Check Service COMM or Dealer Business Systems (DBS)
National Service History to confirm campaign eligibility.
INTRODUCTION
Infiniti is conducting this voluntary service campaign on certain specific model year 2016-2018 Q50 and 2017-2018
Q60 vehicles equipped with the 2.0L turbo gasoline engine to replace the low pressure fuel line. This service will be
performed at no charge to the customer for parts or labor.
IDENTIFICATION NUMBER
Infiniti has assigned identification number P8314 to this campaign. This number must appear on all communication
and documentation of any nature dealing with this campaign.
DEALER RESPONSIBILITY
Dealers are to repair vehicles falling within range of this campaign that enter the service department. This includes
vehicles purchased from private parties, vehicles presented by transient (tourists) owners, and vehicles in a dealer’s
inventory.
Infiniti Bulletins are intended for use by qualified technicians, not 'do-it-yourselfers'. Qualified technicians are properly trained individuals
who have the equipment, tools, safety instruction, and know-how to do a job properly and safely. NOTE: If you believe that a described
condition may apply to a particular vehicle, DO NOT assume that it does. See your Infiniti retailer to determine if this applies to your
vehicle.
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SERVICE PROCEDURE
Removal: Low Pressure Fuel Line
IMPORTANT: Follow all warnings, cautions, and notes in the Electronic Service Manual (ESM) when
working on the high pressure fuel system, such as a high pressure fuel pump.
1. Set the vehicle on a lift.
2. Release fuel pressure in the fuel lines:
a. Remove the battery cover.
Battery cover
Figure 1
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b. Remove the fuse and fusible link cover, and then remove the 15 amp fuse (for fuel pump) where
shown in Figure 2.
Figure 2
c. Start the engine, and then let it idle until it stops.
NOTE: Revving the engine a few times will make the engine stop sooner.
d. After the engine stops, crank the engine a few times to release all fuel pressure.
e. Turn the engine/ignition OFF.
3. Remove the engine cover.
 The engine cover is held on with rubber insulators. Grab one corner, and then carefully pull off.
Engine cover
Figure 3
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4. Move the ECM to the side:
a. Unfasten the two (2) electrical harness clips (see circles in Figure 4).
NOTE: The electrical harness clips will be reused.
b. Unfasten the ECM from its four (4) clips (see arrows in Figure 4).
c. Carefully lift and move the ECM, still connected, to the passenger side of the engine.
ECM
Figure 4
5. Remove the ECM bracket.
 The ECM bracket is held on with rubber insulators. Grab one corner, and then carefully pull off.
ECM bracket
Figure 5
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6. Remove the six (6) ECM bracket 2 T30 bolts, and then carefully move the ECM bracket 2 partially
toward the passenger side of the engine.
ECM bracket 2
Figure 6
7. Remove the two (2) electrical harness protector T30 bolts.
Figure 7
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8. Disconnect the high pressure fuel pump electrical connector.

Carefully use a pick or similar tool to unlatch the lock, and then pull off the connector.
Connector
Figure 8
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9. Remove the four (4) shield T45 bolts, and 10 mm bolt (see Figures 9 and 10).


Arrows = T45 bolts, circle = 10 mm bolt.
Remove the shield by holding the electrical harness protector toward the passenger side.
Shield
Harness
protector
Figure 9

Two of the T45 bolts are located behind the shield (between the engine and engine wall).
 Figure 10 shows the engine out of the vehicle. This is for viewing purposes only.
Figure 10
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10. Remove the high pressure fuel pump insulator.
Insulator
Figure 11
11. At this time, closely observe the routing of the low pressure fuel line from the top side of the vehicle.
CAUTION: It is important to know the correct routing of the low pressure fuel line. A misrouted
fuel line may cause it to contact other component parts.
Fuel line
routing
Figure 12
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12. Unfasten the low pressure fuel line upper clamp.


This is a new style clamp. Go to page 18 for further detail.
Do not disconnect the low pressure fuel line from the high pressure fuel pump at this time.

Place a shop rag under the end of the low pressure fuel line (this is to help catch any residual
fuel when disconnecting it).
Clamp
Tool
Figure 13
13. Raise the vehicle on a lift, and then remove the floor under cover and the floor under side cover.
Cover
Side
Cover
Figure 14
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
At this time, closely observe the routing of the low pressure fuel line from underneath the vehicle.
NOTE: A bracket and some other parts were removed for better viewing only. These parts do not
need to be moved for this procedure. Also refer to Figure 16 on the next page.
CAUTION: It is important to know the correct routing of the low pressure fuel line. A misrouted
fuel line may cause it to contact other component parts.
Fuel line
Transmission
Fuel line
Service
valve
Figure 15
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Figure 16 shows the engine out of the vehicle. This is for viewing purposes only.
High pressure
fuel pump
Coolant
piping
Fuel line
Fuel line
routed
alongside
of engine
Service valve
Figure 16
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14. Place a suitable drip pan under the area of the low pressure fuel line.
15. Properly clamp the fuel line with suitable clamping pliers.

This will prevent residual fuel leakage from the lower fuel line.
16. Unclamp (loosen) the clamp at the service valve and move it further down the lower fuel line.
NOTE: This clamp will be reused.
Service
valve
Fuel line
Fuel line clamp
moved to here
Clamping
pliers
Transmission
Figure 17
17. Disconnect the fuel line at the service valve.
WARNING: Some residual fuel may drain from the fuel line. Keep any fuel from contacting eyes and skin.
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18. Lower the vehicle, and then disconnect the low pressure fuel line from the high pressure fuel pump.
Figure 18
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19. Raise the vehicle, and then remove the service valve bracket’s E10 bolt.
NOTE: Figure 19 shows the lower fuel line still connected. It was disconnected previously during step 17.
Service
valve
NOTE: This fuel line
was disconnected
during step 17.
Figure 19
20. Remove the low pressure fuel line with service valve from the vehicle.

Carefully pull out the low pressure fuel line with service valve from under the vehicle, making sure it does
not “catch” on other components.
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21. Unfasten the clamp, and then remove the low pressure fuel line from the service valve.
22. Install the new low pressure fuel line to the service valve:
a. Slide a new clamp on the end of the new low pressure fuel line that connects to the service valve.

The blue arrows on the low pressure fuel line will be pointing away from the service valve.
b. Line up the low pressure fuel line’s blue mark with the service valve’s black mark.
WARNING: Failure to properly install the low pressure fuel line and its clamps may cause fuel leakage.
Fuel line installed
up to the rib
Arrow points away
from service valve
Service valve
Align these
marks
Clamp fits over
this blue area
(see Figure 21)
Figure 20
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c. Position the clamp on the blue mark, and then fasten the clamp with suitable pliers.
Clamps fit over
each blue area
at both ends of
fuel line
Figure 21

Squeeze the clamp until it snaps together.
Figure 22
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Installation: Low Pressure Fuel Line
1. Install the new low pressure fuel line with service valve in reverse order of removal.

Refer to Figures 12, 15, and 16 to aid in low pressure fuel line routing.
CAUTION: It is important to install the low pressure fuel line correctly. A misrouted fuel line
may cause it to contact other component parts.
2. At this time, check for fuel leaks:
a.
b.
c.
d.
e.
Connect the electrical connector to the high pressure fuel pump.
Install the 15 amp “fuel pump” fuse.
Turn the ignition ON, but do not start the engine.
Check for fuel leaks.
After checking for leaks, turn the ignition OFF.
3. Finish reassembling the vehicle in reverse order of disassembly.

Service valve E10 bolt torque: 8.5 N•m (0.87 kg-m, 75 in lbs)

Floor under cover and floor under side cover bolts torque: 5.5 N•m (0.56 kg-m, 49 in lbs)

Shield T45 bolts torque: 20.0 N•m (2.0 kg-m,
15 ft lbs)
Shield
3
 Torque the T45 bolts in the sequence
shown in Figure 23.

10 mm bolt torque: 10.0 N•m (1.0 kg-m,
89 in lbs)
10 mm bolt located
behind here
4
2
1
Figure 23

Electrical harness protector T30 bolts torque: 8.5 N•m (0.87 kg-m, 75 in lbs)

ECM bracket 2 T30 bolts torque: 8.5 N•m (0.87 kg-m, 75 in lbs)
4. Use CONSULT-III plus (C-III plus) to erase DTCs caused by the engine being started with the fuel pump fuse
removed.

Verify no related DTCs “trip” after erasing.
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Clamps: Unfasten
1. Insert a suitable pick in the location shown in Figure 24.
2. To unfasten, lift the edge by prying up over the lip.
Insert tool
here
Figure 24
Lip
Edge
Figure 25
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PARTS INFORMATION
DESCRIPTION
PART NUMBER
QUANTITY
HOSE-FUEL (low pressure fuel line)
16446-91C1N
1
CLAMP
01555-HG00C
2
CLAIMS INFORMATION
Submit a “CM” line claim using the following claims coding:
CAMPAIGN (“CM”) ID
DESCRIPTION
P8314
Replace Low Pressure Fuel Line
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OP CODE
P83140
FRT
1.4 hrs
ITB18-024