Classification:

Reference:

HA16-002b

Date:

NTB16-056b

February 1, 2018

2016-2018 TITAN XD; EXHAUST SMELL INSIDE VEHICLE
WHEN HVAC IS ON FRESH AIR
This bulletin has been amended to update Applied Vehicles, remove the installation of a micro
filter and to add a reprogramming procedure. No other changes have been made.
Please discard previous versions of this bulletin.

2016-2018 Titan XD (A61)
APPLIED VEHICLES:
APPLIED VIN AND DATE: 2016 Titan XD All
2017 Titan XD All
2018 Titan XD built before 1N6BA1(*)(*)(*)JN 517668 /
January 8, 2018
Cummins Diesel
APPLIED ENGINE:

IF YOU CONFIRM
A diesel exhaust smell is present inside the vehicle:


While the vehicle is stopped.

And


The HVAC system is ON with mode set to fresh air.

ACTION
Refer to the Procedure Overview on page 2 for the vehicle specific service procedure.

IMPORTANT: The purpose of ACTION (above) is to give you a quick idea of the work you
will be performing. You MUST closely follow the entire SERVICE PROCEDURE as it
contains information that is essential to successfully completing this repair.
Nissan 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 Nissan dealer to determine if this applies to your vehicle.
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Procedure Overview
A diesel exhaust smell is present inside the vehicle:


While the vehicle is stopped.

And


The HVAC system is ON with mode set to fresh air.

2016
model year

2017
model year

2018
model year

Was the vehicle built before

Was the vehicle built before

1N6BA1F2(*)GN 502518 /
January 9, 2016?

1N6BA1(*)(*)(*)JN 517668
January 8, 2018?

Yes

No

Yes

Replace the Cowl
Cover starting on
page 3.

No

This bulletin does not
apply. Refer to ASIST
for further diagnostic
information

Proceed to page 11 and reprogram the ECM:
1. Save Computer Data with CONSULT-III plus (C-III plus).
2. At step 27 of the reprogramming procedure (page 16), confirm that a
reprogram is available for the vehicle you are working on.
3. If a reprogram is available, continue with reprogramming.
4. Write Saved Data with C-III plus.

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NTB16-056b

SERVICE PROCEDURE
Cowl Cover Assembly Removal Instructions

Wiper arm
cap

Wiper arm

1. Remove both wiper arm caps.

Figure 1

Wiper arm
nut

2. Remove both wiper arm nuts.

Figure 2

3. Remove both wiper arms.

Front of vehicle

Wiper arms
Figure 3

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NTB16-056b

4. Remove both left and right cowl cover
assembly side finishers.
NOTE: Passenger side shown. Driver’s
side is similar
Side finisher

Figure 4

Plastic fitting

5. Disconnect the washer tank hose at
plastic fitting.

Washer tank hose
Washer tank
Figure 5

6. Remove the nine (9) push pins that hold the front edge of the cowl cover assembly
(Figure 6).

Cowl cover assembly

Push pins
Figure 6

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NTB16-056b

7. Remove the cowl cover assembly as
follows:
a. Lift the cowl cover assembly at the
end.
NOTE: This can be lifted at either the
passenger side or driver’s side.
b. Starting at lifted end, slide hand
between the windshield and cowl
cover assembly.
Cowl cover assembly
c. Detach the seven (7) clips that attach
the cowl cover assembly to the
vehicle.

Figure 7

NOTE: Cowl cover assembly will be
replaced.

8. Remove the hood seal from cowl cover assembly (Figure 8).


Detach Ten (10) clips.

IMPORTANT: The seal has a leading and trailing (front and back) edge. Note the seal
orientation (Figure 8) before removal.

Hood seal

Cowl assembly shown inverted

Leading
edge

Trailing
edge

Seal clip
Seal clip
Figure 8

5/25

Hood seal

NTB16-056b

Cowl Cover Assembly Installation Instructions

1. Add foam block (size: 20x20x50 mm) to
the vehicle as follows:

a. Clean the area directly below the
passenger side corner of the
windshield with 50% isopropyl alcohol
(Figure 9).

Clean here

Figure 9
b. Find the centerline of the farthest left
“cowl cover assembly grommet”
(grommet) shown in Figure 10.

Grommet
centerline

Foam edge against
windshield

8.5 mm

Grommet

NOTE: The centerline will be parallel
to the edge of the windshield.
c. Measure 8.5 mm from the grommet
centerline to the left (Figure 10).
d. Remove foam block adhesive backing
strip.
e. Align foam block against the lower
edge of the windshield and left hand
edge within the 8.5 mm area
(Figure 10).

Figure 10

f. Press foam block firmly into place.
Front of vehicle

2. Attach the hood seal from old cowl
assembly to the new cowl assembly.
IMPORTANT: The seal has a leading
and trailing (front and back) edge. Note
the seal orientation (Figure 11) before
installing.
Figure 11

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NTB16-056b

3. Assemble the new cowl cover extension to the new cowl cover assembly, from Part
Information, by inserting the molded tabs into the side of the cowl cover assembly
(Figure 12).
NOTE: Tabs can be pulled through to seat them with an appropriate tool.
Cowl cover
assembly

Molded tabs

Baffle/extension
Figure 12

4. Clean the wiper arm mount (Figure 13).


This will reduce the possibility of wiper
looseness.
Wiper arm
mount
Figure 13

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NTB16-056b

5. Install the new cowl cover assembly to the vehicle as follows:
a. Align the center guide of the cowl cover assembly to the center slot of the cowl
(Figure 14).
b. Snap the seven (7) clips that attach the cowl cover assembly to the vehicle at the
base of the windshield, starting from the center guide and working toward the left
and right.

Center slot

Center guide
Figure 14

c. Confirm that the seal fits correctly to the windshield.


No gaps between seal and glass are allowed.

d. Install the nine (9) push pins (Figure 15).
e. Connect washer tank tube to the plastic fitting.

Cowl cover assembly

Push pins
Figure 15

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NTB16-056b

6. Assemble the baffle to the new cowl extension.


Insert clip A and clip B on baffle into the two holes present in the new cowl extension
(Figure 16).
NOTE: Clips A, B, and C are pre-assembled to baffle.

Baffle

Baffle

Clip A
Clip C

Clip A

Clip C
Clip B

Clip B
Cowl
extension

Figure 16

Baffle

7. Insert rearward baffle clip C to the cowl
cover.

Clip C
Figure 17

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Clip B

NTB16-056b

8. Install left and right side finishers for the
cowl cover assembly.
Side finisher

Figure 18
9. Re-install the wiper arms.


Torque nuts to: 23.6 N•m (2.406 kg-m, 17 ft-lb.)

10. Re-install wiper arm caps.

10/25

NTB16-056b

Reprogram ECM

IMPORTANT: Before starting, make sure:


ASIST on the CONSULT PC has been synchronized (updated) to the current date.



All C-III plus software updates (if any) have been installed.



The CONSULT PC is connected to the Internet (Wi-Fi or cable).

NOTE:


For the Titan XD Diesel, the GR8 set to ECM power supply mode can be
attached to either 12 volt battery.

CAUTION:


Connect the GR8 to the 12V battery and set to ECM power supply mode.
If the vehicle battery voltage goes below 12.0V or above 15.5V during
reprogramming, the ECM may be damaged.



Be sure to turn OFF all vehicle electrical loads.
If a vehicle electrical load remains ON, the ECM may be damaged.



Be sure to connect the AC Adapter.
If the CONSULT PC battery voltage drops during reprogramming, the process
will be interrupted and the ECM may be damaged.



Turn OFF all external Bluetooth® devices (e.g., cell phones, printers, etc.)
within range of the CONSULT PC and the plus VI. If Bluetooth® signal waves
are within range of the CONSULT PC during reprogramming, reprogramming
may be interrupted and the ECM may be damaged.

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NTB16-056b

Save Computer Data

11. Connect the CONSULT PC to the vehicle.

12. Open / start C-III plus.

13. Turn the ignition ON, with engine OFF (engine not running).

14. Wait for the plus VI to be recognized.


The Serial No. will display when the plus VI is recognized.

15. Select Diagnosis (One System).

Step
15

Step 14:
plus VI is
recognized

Figure 19

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NTB16-056b

16. Navigate C-III plus to ENGINE, and then to Work support (see Figure 20).

17. Select SAVE COMPUTER DATA.

18. Select Start.

Step
16

Step
17