Classification:

Reference:

EM20-004

Date:

NTB20-053

July 20, 2020

2020 TITAN 4WD;
VIBRATION WHILE DRIVING ABOVE 3,500 RPM

APPLIED VEHICLES:
APPLIED DRIVETRAIN:

2020 Titan (A61)
4WD

NOTE:
This bulletin does not apply to Titan XD.

IF YOU CONFIRM
A vibration is present while driving with the engine speed above 3,500 RPM.

ACTION

1.

Diagnose the fan coupler.

2.

Install the fan coupler kit listed in PARTS INFORMATION, if applicable. The fan
coupler kit includes a new fan coupler, fan pulley and fan bracket.

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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SERVICE PROCEDURE
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:
Before starting this procedure, ensure the engine coolant temperature is 178-203 °F
(81-95 °C).
1.

Connect the C-III plus VI to the vehicle.

2.

Open C-III plus on the CONSULT PC.

3.

Turn the ignition ON, but do not start the engine.

4.

Select Diagnosis One System.

5.

Select ENGINE.

6.

Select Data Monitor.

7.

Clear all Data Monitor items.

8.

Select the following parameters in Data Monitor:


ENG SPEED



COOLANT TEMP/S



COOLING FAN SPD



FAN DUTY

9.

Start the engine.

10.

Using the accelerator pedal, increase the engine speed by approximately 1,000 RPM
per second until 5,500 RPM is achieved, then allow the engine speed to return to idle.

11.

Perform step 10 a total of five (5) times while observing the COOLING FAN SPEED.


If the COOLING FAN SPEED does not reach 900 RPM or higher, this bulletin does
not apply. Return to the ESM for further diagnostic and repair information.



If the COOLING FAN SPEED reaches 900 RPM or higher, continue to step 12 on
page 3.

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NTB20-053

12.

Obtain a screen shot, photo or video of Data Monitor (Figure 1) showing the
following:


ENG SPEED 3,500 RPM or above



COOLANT TEMP/S 178-203 °F (81-95 °C)



COOLING FAN SPEED 900 RPM or above



FAN DUTY 0 %



VIN

VER xxxx

CONSULT-III plus

VIN:xxxx

Country: United States

Vehicle:

14.4
Data Monitor

Sort by selection

Engine
Engine

Ascending order

Line Graph

ENG SPEED
COOLANT TEMP/S

Single List

3500
91

rpm
°C

COOLANT TEMP/S

Engine

COOLING FAN SPD

Engine

FAN DUTY

900
0

rpm
%

Figure 1

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NTB20-053

13.

Complete the PCC Assistance Request Form in ASIST (Figure 2).
a. Enter Dealer Code.
b. Enter 17 Digit VIN.
c. Select New Engine Form.
d. Select Next.

Next
Figure 2

e. Attach the screen shot, photo or video of Data Monitor collected from C-III as
described in step 12 on page 3.
f. After submitting the Assistance Request Form with the attached image, call the
PCC at 800-973-9992 (opt 1) for repair pre-approval.

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NTB20-053

14.

Remove the fan bracket (1), fan pulley (2) and the fan coupler (3) (see Figure 3).


Refer to the ESM for removal of the fan bracket, fan pulley, and the fan coupler:
ENGINE > ENGINE COOLING SYSTEM > VK56VD > REMOVAL AND
INSTALLATION > COOLING FAN.

Figure 3

15.

Install the new fan bracket (see PARTS INFORMATION on the last page of this
bulletin).
a. Upon installation of the fan bracket, hand tighten but DO NOT torque the fan
bracket bolts.
b. Torque the shared A/C compressor/fan bracket bolt first (Figure 4), then torque
the remaining fan bracket bolts.
HINT: Figure 2 is shown with the idler pulley and the fan pulley installed, but these
pulleys will remain removed during fan bracket installation.

Idler pulley

Fan pulley
Torque this
bolt first

Figure 4
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NTB20-053

16.

Install the remaining components in the reverse order of removal.


Refer to the ESM: ENGINE > ENGINE COOLING SYSTEM > VK56VD >
REMOVAL AND INSTALLATION > COOLING FAN.



During installation of the new fan pulley and fan coupler, ensure the paint
reference marks are aligned (see Figure 5).

Align these yellow
reference marks

Figure 5

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NTB20-053

PARTS INFORMATION
DESCRIPTION

PART NUMBER

QUANTITY

Fan Coupler Kit

21084-1LA8A

1

CLAIMS INFORMATION
Submit a Primary Part (PP) type line claim using the following claims coding:
DESCRIPTION
PFP
OP CODE
SYM
DIA
FRT
Check Cooling Fan Speed
CX35AA
0.2
(1)
ZN
32
Check Cooling Fan Speed &
CX36AA
1.4
Install Fan Coupler Kit
(1) Reference the electronic parts catalog and use the Fan Coupling (21082-*****) as the
Primary Failed Part (PFP).

AMENDMENT HISTORY
PUBLISHED DATE REFERENCE
July 20, 2020

NTB20-053

DESCRIPTION
Original bulletin published

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NTB20-053