NTB17-122

Classification:
EL17-037
Reference:
Date:
NTB17-122
December 1, 2017
2016 – 2017 TITAN XD DIESEL; BLOCK HEATER INOPERATIVE
APPLIED VEHICLES:
APPLIED ENGINE:
2016 – 2017 Titan XD (A61)
Cummins (5.0L V8) Diesel
IF YOU CONFIRM
The coolant heater (block heater) needs to be replaced based on the Electronic Service
Manual (ESM) inspection,
and
The vehicle is currently equipped with a coolant heater (with attached cord) located in the
front engine cover.
NOTE:

This bulletin does not apply if the vehicle is equipped with a coolant heater
located in the water inlet at the lower radiator hose.

Refer to the ESM, section CO – Engine Cooling System, for coolant heater
operation and inspection information.
ACTION
1. Use the Service Procedure in this bulletin to install a new coolant heater, locating it in
the water inlet at the lower radiator hose.
2. Cut the cord to the original coolant heater.
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
Coolant Heater Installation
1. Record (write down) any customer settings that will be lost when the battery is
disconnected.

Refer to the ESM section PG – Power Supply, Ground, & Circuit Elements, for a
listing of systems that may lose settings or memory when disconnecting the 12V
battery.
 Look in the PG section index for ADDITIONAL SERVICE WHEN REMOVING
BATTERY NEGATIVE TERMINAL.
 This list often includes items such as audio, HVAC, power windows, clock, etc.
2. Disconnect the negative battery cable from both batteries.
3. Drain the engine coolant.

Refer to the ESM, section CO – Engine Cooling System, for information on
draining coolant.

Drain the coolant into a clean drain pan. The drained coolant will be
reused/reinstalled back into the cooling system.
CAUTION: Do not spill coolant on the drive belt.
IMPORTANT: Leave the coolant heater in its present location as a non-functional plug.
4. Remove the existing water inlet (Figure 1) as follows:
a. Remove the lower radiator hose from the water inlet.
b. Remove the heater hose from the water inlet.
c. Remove the two bolts that attach the water inlet to the engine front cover.
Lower radiator hose
Water inlet
Figure 1
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Heater hose
Bolts
NTB17-122
5. Install new water inlet in the reverse order that the original was removed (Figure 2).

Torque the two bolts to 18 N•m (1.8 kg-m, 13 ft-lb).
IMPORTANT:
 Use the new bolts from the Parts Information when installing the new water inlet.
They are longer.
 The bolt with the thread-locker (SCREW,HEX FLANGE HEAD CAP) must be used in
the location shown in Figure 2.
6. Install a new coolant heater into the bottom of the water inlet (see Figure 2).

Torque the coolant heater to 55 N•m (5.6 kg-m, 40 ft-lb).
SCREW,HEX FLANGE HEAD CAP
(with thread-locker)
Lower radiator hose
Water inlet
Coolant heater
Heater hose
Figure 2
7. Re-fill the engine coolant.

Refer to the ESM, section CO – Cooling System, for coolant refill information.

Reuse the coolant that was removed from the engine, and then verify that the
coolant is at a 50/50 mix in the system using a refractometer.
IMPORTANT:
 Use Nissan long life coolant and distilled water, or equivalent.
 Coolant should be changed every 45,000 miles.
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NTB17-122
Coolant Heater Cord Installation
1. Prepare the “coolant heater cord” (cord) as follows:
a. Remove the cord from the package.
b. Remove the white tape that retains the coiled cord.
c. Remove the five (5) clips circled in green that are shown in Figure 3 from the cord.

Do not remove the three (3) clips that are circled in red in Figure 3.
IMPORTANT: The three original clips circled in red will be retained for cord
installation.
Do not remove these
two (2) clips
Do not remove this clip.
Remove this
clip
Remove
tape
Remove
these clips
Before
Figure 3
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NTB17-122
d. Slide the three (3) remaining harness clips to the locations shown in
Figures 4, 5, and 6.
1st clip
2nd clip
3rd clip
After
Figure 4
Coolant heater cord
Connection to
coolent heater
1st clip; approximately 14
inches from end
1st clip
2nd clip
2nd clip; approximately 21 inches
from end (7 inches from 1st clip)
Figure 5
110VAC plug
3rd clip
3rd clip; approximately
9 inches from end
Figure 6
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NTB17-122
e. Recoil the cord so that:

The block heater connector to coiled cord is 22 inches.

The 110VAC plug end to coiled cord is 17 inches.
and then

Retain recoiled cord with a zip tie as shown in Figure 7.
22 inches
Zip tie
Figure 7
17 inches
2. Connect the cord to the coolant heater as shown in Figure 8.
3. Clip the cord to the power steering line as shown in Figure 8.

Leave slack in the cord between the coolant heater connector and the first clip, to
the power steering line, as shown in Figure 8.
Power
steering line
Coolant heater
connector
Clips
Coolant
heater cord
Figure 8
Coolant heater
cord slack
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4. Attach the coiled section of cord to the power steering lines with two zip ties; one at
each end.

Insert the zip ties through at least three coils to provide support.
Bottom of radiator core support
Zip ties
Transmission
cooler
Coolant
heater cord
Figure 9
5. Route the 110VAC plug end of the cord over the top of the frame in front of the
transmission cooler (see Figure 10).
6. Clip the cord to the frame.

Insert from the top into the pre-existing hole as show in Figure 10.
Transmission
cooler
110VAC plug end of
coolant heater cord
Frame
3rd clip inserted
into frame from top
Figure 10
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NTB17-122
7. Route the coolant heater cord 110VAC
plug through the front bumper as shown
in Figure 11.
Front bumper
Coolant heater
cord 110VAC plug
Figure 11
8. Cut through the old/original coolant heater cord (plug end) near its first harness clip,
where shown in Figure 12, and discard the removed coolant heater cord/plug.

Cut the end of the coolant heater cord that plugs into the wall.
NOTE: Battery does not need to be removed for this step.
Coolant
heater
cord
Black clip to
panel behind
battery
Cut old / original
coolant heater
cord here.
Battery tray
Figure 12
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NTB17-122
9. Re-install any remaining parts that were removed in reverse order.

Refer to the ESM as needed for re-assembly.
10. Re-set any customer settings that were lost when the battery was disconnected.

Refer to the ESM section PG-Power Supply, Ground, & Circuit Elements, for a
listing of systems that may lose settings or memory when disconnecting the 12V
battery.
 Look in the PG section index for ADDITIONAL SERVICE WHEN REMOVING
BATTERY NEGATIVE TERMINAL.
 This list often includes items such as audio, HVAC, power windows, clock, etc.
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NTB17-122
PARTS INFORMATION
DESCRIPTION
PART #
QUANTITY
HEATER – CYLINDER BLOCK (Coolant Heater)
COOLANT HEATER CORD
CONNECTION,WATER INLET (Water Inlet)
SCREW, HEX FLANGE HEAD CAP
(Water inlet mounting bolt with thread-locker)
SCREW,STUDDED FLANGE CAP
(Water inlet mounting bolt)
CLIP (TIE STRAP)
11001-EZ40A
24076-EZ01A
13048-EZ40B
1
1
1
11035-EZ44D
1
29799-EZ40A
1
24224-3VX0B
1
CLAIMS INFORMATION
Submit a Primary Part (PP) type line claim using the following claims coding:
DESCRIPTION
PFP
OP CODE
SYM
DIA
FRT
Replace coolant heater
(1)
AX45AA
ZE
32
1.1
(1) Reference the electronic parts catalog (FAST), and use the Cylinder Block Heater
(11001-*****) as the Primary Failed Part (PFP).
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