QUALITY ACTION
CAMPAIGN BULLETIN
Fuel Injector Replacement
Retailer Inventory
Reference: P8315
Date: July 20, 2018
Attention: Retailer Principal, Sales, Parts and Service Managers
Affected Models/Years:

Affected
Population:

Retailer
Inventory:

SERVICE COMM
Activation date:

Stop Sale
In Effect

NA

53

July 20, 2018

NO

MY2019 QX50 (J55)
***** Retailer Announcement *****

INFINITI is conducting a quality action to replace the high pressure fuel injectors on 53 specific MY 2019
INFINITI QX50 (J55) vehicles in new inventory. A misfire condition may occur due to insufficient fuel
volume injection resulting in malfunction indicator light (MIL) illumination.
Affected vehicles are not subject to stop sale and are either currently in retailer inventory or assigned and
in transit to the retailer. INFINITI requests retailers to remedy all affected inventory vehicles prior to sale
to ensure client satisfaction.
***** What Retailers Should Do *****
PLEASE FOLLOW THE ATTACHED REPAIR INSTRUCTIONS:
1. Verify if vehicles are affected by this client satisfaction initiative using Service Comm or DBS National
Service History – Open Campaign I.D. P8315
 New vehicles in retailer inventory can also be identified using DBS (Sales-> Vehicle Inventory,
and filter by Open Campaign).
 Refer to IPSB 15-286 for additional information
Please
continue to check newly arriving inventory for campaign applicability.

2. Use the attached procedure to replace the high pressure fuel injectors.
 INFINITI has developed an automatic parts shipment to provide affected retailers with
enough parts to repair their affected inventory plus any affected INFINITI Courtesy Vehicles
(ICV). Parts will begin arriving at retailers by Tuesday, July 24, 2018.
3. The service department should submit the applicable warranty claim for the action performed so it
can be closed on Service Comm and release the vehicle.
***** Retailer Responsibility *****
It is the retailer’s responsibility to check Service Comm or DBS National Service History – Open
Campaign using the appropriate campaign I.D for the inspection status on each affected vehicle
currently in new vehicle inventory.
Thank you for your prompt attention to this matter and we apologize for any inconvenience this may
have caused.

P8315 | Original Document

P8315 – QX50 (J55)
DIRECT FUEL INJECTORS
SERVICE PROCEDURE:
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, and then open the hood.
2. Release fuel pressure in the fuel lines:
a. Remove the cover, and then unfasten and carefully flip over the IPDM E/R.
b. Remove the # F11 20 amp fuel pump fuse (see arrow in Figure 1).

Figure 1
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 OFF.

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3. Disconnect both battery cables, negative cable first, and then wait at least three (3) minutes before
going to step 4.
 Make sure the battery cable clamps do not come in contact with the battery posts.

Battery cover

Figure 2
4. Remove the coolant reservoir cap.
 Reinstall the coolant reservoir cap once the coolant is done draining.
WARNING: Do not remove the radiator cap when engine is hot.
Reservoir cap

Figure 3
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5. Remove the front under cover.

Front under cover

Figure 4
c. Drain the coolant.
a. Set a drain pan below the radiator drain plug.
b. Remove the radiator drain plug.

Drain plug

Figure 5

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6. Remove the engine cover.
 The engine cover is held on with rubber insulators. Grab one corner, and then carefully pull up.

Engine cover

Figure 6
7. Remove the air cleaner and air duct:
a. Disconnect the mass air flow sensor connector, and then unfasten the electrical harness clip
(see white oval in Figure 7).
NOTE: All electrical harness clips will be reused throughout the repair procedure.
b. Remove the nut and bolts (see arrows in Figure 7).

Air cleaner
and air duct

Figure 7
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c. After removing the air cleaner assembly, cover air duct 1’s opening with a clean shop cloth or other
suitable covering.

Duct 1

Figure 8
8. Move the air inlet resonator out of the way:
a. Remove the bolts (see arrows in Figure 9).

Hose 1

Resonator

Hose 2
Figure 9

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b. Disconnect air inlet hose 1 and air inlet hose 2 (see previous page, Figure 9).
 Using a screwdriver or suitable tool at B , move the spring upward, and then pull off the
related air inlet hose.
1-spring; A-arrow view; B-insert tool; C-spring movement direction; D-tabs

Figure 10
c. Carefully flip over the air inlet resonator out of the way to the passenger side.
 Cover the duct openings with clean shop cloths or other suitable covering.
Resonator,
flipped over

Figure 11
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9. Remove the core support cover:
a. Remove the core support cover clips.
 See arrows for clip locations.

Cover

Figure 12
b. Slide out the core support cover from under the white clip.
NOTE: The white clip is mounted on the radiator core support.
c. Remove the core support cover by sliding it toward the engine, and then lifting out.

Core
support

Cover
Clip

Figure 13
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10. Disconnect the crash zone sensor connector.


Carefully use a pick or similar tool to unlatch the connector, and then pull off the connector.

Connector

Hood lock

Figure 14
11. Remove the upper fascia retainer supports.
 Remove the bolts and clips (see arrows in Figure 15).

Supports

Figure 15
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12. Remove the “low” horn.
a. Disconnect the two (2) electrical connectors.
b. Remove the bolt (see white circle in Figure 16).
13. Remove the hood lock:
a. Disconnect the harness connector.
b. Unfasten the secondary latch cable from the hood lock only.
CAUTION: Be careful not to bend the cable too much, keeping the radius 100 mm (3.94 in) or more.
c. Remove the three (3) bolts (see arrows in Figure 16).

Connectors
Connector

Hood
lock

Horn
Cable

Connector

Figure 16

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d. Flip over the hood lock, and then remove the hood lock release cable.
CAUTION: Be careful not to bend the cable too much, keeping the radius 100 mm (3.94 in) or more.

Cable
Hood lock –
back side

Figure 17

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14. Remove the upper air guide:
a. Unfasten the clips (see arrows in Figure 18).

Air guide

Figure 18
b. Flip over the upper air guide, and then unfasten the harness connector clip.

Air guide

Clip

Figure 19
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15. Unfasten the washer tank inlet clip.
16. Unfasten the white clip, and then remove the hood lock release cable from the white clip.
NOTE: The black hood lock release cable clip will be unfastened from the radiator core support in step 20.
17. Remove the two (2) bracket bolts (see white circle in Figure 20).
18. Remove the six (6) radiator core support bolts (see arrows in Figure 20).
19. Remove the low pressure flexible hose bracket bolt.


The low pressure flexible hose bracket needs to be slightly moved for radiator core support removal.

CAUTION: Do not allow the low pressure flexible hose to move excessively.

Inlet clip

White
clip
Radiator
core
support
Flexible
hose

Bracket
bolt
Figure 20

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20. Remove the radiator core support, flip it over, and then unfasten the black hood lock release cable clip
from the radiator core support.

Radiator
core
support

Clip

Figure 21

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21. Unclamp, and then disconnect the one end of each of the four (4) hoses (see arrows in Figure 22).
22. Disconnect the EVAP canister purge volume control solenoid valve electrical connector, and harness clip (see
white circles in Figure 22).

Figure 22

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23. Disconnect the MAP sensor connector (see circle in Figure 23).
24. Unclamp, and then disconnect the one end of each of the four (4) turbo water inlet and outlet hoses from the
metal coolant tubes (see arrows in Figure 23).
25. Remove the two (2) bolts (see Figure 23).
26. Unfasten the harness clip, and then remove the metal coolant tube assembly.

Clip

Bolt

Coolant
tubes

Bolt
Figure 23

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27. Remove the bracket bolt, and then move the EVAP hose out of the way (this will give easier access
for the next step).
28. Unclamp the clamps, and then disconnect the heater hose and water hose A.
 See white arrows in Figure 24.
 Once disconnected, push the hoses out of the way.
29. Disconnect the intake manifold runner control valve motor connector.

Heater
hose
Bolt

EVAP
hose

Connector

Water
hose A

Figure 24
30. Disconnect the intake manifold runner control valve position sensor connector.
31. Unfasten the harness clip on the intake manifold.

Clip
Connector

Intake
manifold
Figure 25

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32. Remove the air outlet tube bolt.
33. Disconnect the electronic throttle control actuator connector.

Spring
Actuator

Outlet
tube

Connector

Bolt

Radiator
fan shroud –
driver side

Figure 26

34. Disconnect the air outlet tube from the electronic throttle control actuator.


Using a screwdriver or suitable tool at C , move the spring upward until it is in the unlocked
position, and then pull off the air outlet tube.
1-spring; A-locked position; B-unlocked position; C-spring movement direction; D-tabs
1
1

Figure 27

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35. Remove the oil level gauge.

Gauge

Figure 28

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36. Remove the intake manifold:
a. Loosen the intake manifold bolts in the sequence shown in Figure 29, and then remove them.

4

3

2

1

5

Figure 29
b. Carefully remove the intake manifold.

Intake
manifold

Figure 30

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c. Cover all openings – cylinder head intake ports and air outlet tube – with clean shop cloths or other
suitable covering (see arrows in Figure 31).

Figure 31

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37. Remove the water inlet pipe and oil level gauge guide:
a. Remove the oil level gauge guide bolt.
b. Unfasten the harness clip.
c. Remove the three (3) water inlet pipe bolts (see arrows in Figure 32).

Guide
bolt
Inlet
pipe

Clip

Figure 32
d.
e.
f.
g.
h.

Wiggle out the water inlet pipe from the engine block.
Remove the oil level gauge guide.
Cover the oil level gauge guide’s hole in the block with suitable covering.
Unfasten the harness clip.
Remove the water inlet pipe, and then cover the water inlet pipe’s hole in the block with suitable covering.

Clip
Inlet
pipe

Figure 33
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38. Remove the high pressure fuel rail protector:
a. Disconnect the high pressure fuel rail pressure sensor connector.

Sensor

Connector

Protector

Figure 34

b. Remove the four (4) bolts (see arrows and callout in Figure 35).

Protector

Hidden
bolt

Figure 35

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c. Pull back on the high pressure fuel rail protector, and then carefully remove the high pressure