Classification:

ST14-009

Reference:

Date:

NTB14-053

June 6, 2014

2014 ALTIMA; HYDRAULIC ELECTRIC POWER STEERING
SERVICE INFORMATION
APPLIED VEHICLE: 2014 Altima (L33)

SERVICE INFORMATION
As with other Nissan vehicles, the Altima is equipped with Hydraulic Electric Power
Steering (H-EPS). This system uses an electric motor to drive a pump rather than relying
on a conventional belt-driven pump. Some normal operational sound may be heard from
the front of the vehicle generated by the H-EPS when the steering wheel is operated.
Comparing the incident vehicle to a “known good vehicle” will help determine if there is
louder than normal H-EPS related sound.
If diagnosed as having louder than normal H-EPS sound, use this bulletin to assist in
locating and repairing the cause.

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
If the applied vehicle being worked on is diagnosed as having louder than normal H-EPS
related sound, review the following pages for possible causes and related repair.
Power Steering Fluid
Check the fluid level of the Hydraulic
Electric Power Steering (H-EPS) system.






Check fluid level with the ignition
OFF and fluid temperature
between 0 – 30°C (32 – 86°F).
Power steering fluid level should
be within the hatching area of the
indicator on the power steering
reservoir tank cap.
If fluid is needed, use only
genuine NISSAN E-PSF or
equivalent.

Hatching
area

Figure 1

Right Front Hood Ledge Seal

Make sure the right front hood ledge seal
(passenger side) is installed correctly.


Install the seal correctly

or


Hood ledge
seal

If damaged, replace the seal

or


If missing, install a seal.

Figure 2

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Pump Mounting Isolator

Make sure there is no binding on the
H-EPS pump mounting isolator as follows:
a. Loosen the four (4) H-EPS pump
mounting bolts.

Bolt

b. Move the H-EPS pump a small
amount from side to side.
Bolt

c. Tighten the mounting bolts.

Bolt

Mounting bolts torque:
13.5 N•m (1.4 kg-m, 10 ft-lb)

Bolt
Figure 3

Pump Felt Cover

Make sure the H-EPS pump felt cover is
installed correctly.


Install the felt cover correctly

H-EPS pump
felt cover

or


If damaged, replace the felt cover

or


If missing, install a felt cover.

Figure 4

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NTB14-053

H-EPS High Pressure Line
Check the H-EPS high pressure line and the A/C low pressure line. Make sure
they are not touching each other (see Figure 5).
a. Check the two locations circled in Figure 5.
b. If the lines are touching, reposition the lines so they are not touching.

Check the H-EPS high pressure line and coolant reservoir. Make sure they are not
touching each other (see Figure 5).
If touching:
a. Make sure the coolant reservoir is mounted correctly; its locator boss must be
seated in the mounting hole.
b. If needed, reposition the H-EPS line so it is not touching the reservoir.

A/C low pressure line:
4 cyl shown,
6 cyl is similar

Coolant
reservoir

H-EPS high
pressure line

Figure 5

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NTB14-053

4 cyl is shown, 6 cyl is similar
Make sure the H-EPS high pressure line is
not touching the strut tower brace or the
torque rod mounting bracket.

H-EPS high
pressure line

a. Check the two locations circled in
Figure 6.
b. If needed, reposition the H-EPS high
pressure line so it is not touching.

Figure 6
4 Cylinder Models: H-EPS High Pressure Line
H-EPS high
pressure line

Check the H-EPS high pressure line
retaining clamp shown in Figure 7.
a. Make sure the clamp is secured
correctly.


Figure 7 shows a clamp that
is not secured correctly.

b. If the clamp is loose like the one
shown in Figure 7, replace the
H-EPS high pressure line.


NG: Retaining
clamp loose

Refer to the Electronic Service
Manual (ESM), section STSteering System, for
replacement information.

Figure 7
Passenger side
strut tower

Make sure the H-EPS high pressure line is
not touching the A/C line or vehicle body.
a. Check the area circled in Figure 10.
b. If needed, reposition the lines so they
are not touching.

A/C
line

c. If needed, reposition the H-EPS line
so it is not touching the vehicle body.
Front of vehicle

Figure 8
NOTE: The view in Figure 8 is downward from the inboard side of the passenger
side strut tower.
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NTB14-053

H-EPS Low Pressure Line
4 cyl is shown, 6 cyl is similar
Make sure the H-EPS low pressure line is
not touching the sub-frame near the front of
the engine.

H-EPS low
pressure line

a. If needed, reposition the H-EPS low
pressure line so it does not touch the
sub-frame.

Sub-frame
Figure 9

4 Cylinder Models: H-EPS High and Low Pressure Lines
H-EPS high and
low pressure lines
Make sure the H-EPS high and low pressure
lines under the vehicle are not touching
surrounding parts.

Engine Wall

a. Lift the vehicle.
b. Visually check the routing of the
under-vehicle H-EPS high and low
pressure lines.
c. If needed, reposition the H-EPS high
and low pressure lines so they are
not touching any surrounding parts.
Figure 10

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NTB14-053

H-EPS Pump
4 cyl shown, 6 cyl is similar
Make sure the A/C low pressure line is not
touching the H-EPS pump.

H-EPS
pump

A/C low
pressure
line

a. Check the location circled in
Figure 8.
b. If needed, reposition the A/C low
pressure line so it is not touching the
H-EPS pump.

Figure 11
Make sure the A/C high pressure line is not
touching the H-EPS pump.
H-EPS
pump

a. Check the location circled in Figure 9.
b. Wiggle the H-EPS pump and observe
the A/C high pressure line. If it
moves, it is touching.
c. If needed, reposition the A/C high
pressure line so it is not touching the
H-EPS pump.

A/C high
pressure line
Figure 12

Noise Insulator
Make sure the noise insulator is installed
inside the RH (passenger side) front fender
protector:

Front strut
Front

a. Remove the passenger side front
wheel.
b. Partially remove the fender protector.


Refer to the ESM, section EXTExterior, as needed.
c. Confirm the insulator is in place.

or


Make sure the insulator is
installed correctly
Figure 13

If damaged or missing, replace
the fender protector with
insulator.
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Noise isolator on
back side of fender
protector

NTB14-053

Baffle
Baffle

Make sure the baffle is positioned properly
inside the RH (passenger side) front fender.

Front

a. Make sure the baffle is flush against
the fender.
b. There should be no gap between
the fender protector and baffle when
the fender protector is installed.
c. If needed, reposition the baffle or
install a new one.
Figure 14

OK
Figure 15 – baffle is installed correctly.

Figure 15

NG
Figure 16 – example of a baffle installed
incorrectly.

Figure 16
NOTE: Lug nuts torque (when reinstalling the right front wheel): 113 N•m (12 kg-m,
83 ft-lb).
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4 Cylinder Models: H-EPS Bracket
NOTE: All 2014 Altima vehicles have a H-EPS bracket. There is no need for replacement.
Check torque of all three (3) H-EPS bracket nuts:
Nut 1 torque: 8 N•m (0.81 kg-m, 5.9 ft-lb, 71 in-lb)
Nuts 2 & 3 torque: 4.9 N•m (0.49 kg-m, 3.6 ft-lb, 43 in-lb)

Make sure the H-EPS bracket and the H-EPS tube bracket are not touching
(see Figure 19).
a. Make sure there is a gap between the brackets all the way around.
b. Make sure the rubber insulators are seated properly.
c. If needed, reposition the brackets so they are not touching.

Make sure the anti-rotation leg of the H-EPS bracket is flush to the bottom of the torque rod
mounting bracket (see Figure 19).
a. Check the position the H-EPS bracket, make sure its anti-rotation leg is flush to the
bottom of the torque rod mounting bracket.
Torque rod
mounting bracket

Nut 1
Rubber insulators
(under washers)

Nut 2

Rubber insulators
(under washers)

H-EPS
bracket
Nut 3

Anti-rotation leg with
rubber insulator:

H-EPS tube
bracket

Should be flush to
bottom of the torque
rod mounting bracket

Figure 19

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6 Cylinder Models: H-EPS Bracket
NOTE: All 2014 Altima vehicles have a H-EPS bracket. There is no need for replacement.
Check torque of all three (3) H-EPS bracket nuts:
Nut 1 torque: 8 N•m (0.81 kg-m, 5.9 ft-lb, 71 in-lb)
Nuts 2 & 3 torque: 4.9 N•m (0.49 kg-m, 3.6 ft-lb, 43 in-lb)
Make sure the H-EPS bracket and the H-EPS tube bracket are not touching
(see Figure 20).
a. Make sure there is a gap between the brackets, all the way around.
b. Make sure the rubber insulators are seated properly.
c. If needed, reposition the brackets so they are not touching.
Make sure the H-EPS bracket’s anti-rotation leg is flush to the bottom of the torque rod
mounting bracket (see Figure 20).
a. Check the position the H-EPS bracket, make sure its anti-rotation leg is flush to
bottom of the torque rod mounting bracket.
Rubber insulators
(under washers)

Nut 1
Torque rod
mounting bracket

H-EPS
bracket

H-EPS tube
bracket

Nut 2
Nut 3

Anti-rotation leg with
rubber insulator:
Should be flush to
bottom of the torque
rod mounting bracket

Figure 20

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