Infiniti FX35, FX50 (S51). Manual — part 1837

SYSTEM SYMPTOM

TM-155

< SYMPTOM DIAGNOSIS >

[7AT: RE7R01A (VQ35HR)]

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TM

N

O

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Func-
tion trou-
ble

Poor
power
trans-
mis-
sion

Slip

With selector lever in
“D” position, accelera-
tion is extremely poor.

5

3

3

3

4

1

1

1

2

With selector lever in
“R” position, accelera-
tion is extremely poor.

5

3

3

3

4

1

1

1

2

While starting off by
accelerating in 1GR,
engine races.

3

3

3

4

1

1

1

2

While accelerating in
2GR, engine races.

3

3

3

4

1

1

1

1

2

While accelerating in
3GR, engine races.

3

3

3

4

1

1

1

1

2

While accelerating in
4GR, engine races.

3

3

3

4

1

1

1

1

2

While accelerating in
5GR, engine races.

3

3

3

4

1

1

1

1

1

2

While accelerating in
6GR, engine races.

3

3

3

4

1

1

1

1

1

2

While accelerating in
7GR, engine races.

3

3

3

4

1

1

1

1

1

2

Lock-up

3

3

3

4

1

1

2

No creep at all.

1

1

1

1

1

1

1

1

1

Extremely large
creep.

1

Symptom

Diagnostic item

Con

tro

l l

ink

ag

e

Ou

tp

ut

sp

ee

d s

en

s

o

r

En

gin

e sp

ee

d

s

ig

na

l

Inp

ut

sp

ee

d se

n

s

or

A/

T f

lui

d t

em

pe

rat

u

re se

ns

or

T

ran

sm

is

si

o

n

ran

g

e

swi

tch

Ma

nu

al

mo

de

swi

tch

Li

n

e

pre

ss

u

re

so

le

no

id

va

lv

e

T

o

rqu

e

c

o

n

v

e

rte

r cl

utch

so

le

no

id

va

lv

e

Lo

w bra

ke

so

le

no

id

va

lv

e

F

ron

t

b

rak

e so

len

oi

d v

al

v

e

Hi

gh

an

d lo

w rev

e

rs

e cl

u

tc

h

s

o

le

n

o

id

v

a

lve

In

pu

t clu

tch

sol

eno

id

valve

Dire

ct

cl

utc

h

so

le

no

id

va

lv

e

2

346

b

rak

e s

o

len

oi

d v

al

v

e

An

ti-i

nte

rlo

ck

s

o

le

no

id

va

lv

e

CAN communication

TM

-1

6

7

TM-7

6

TM-7

8

TM-7

4

TM-7

2

TM-7

1

T

M

-111

TM-9

7

TM-9

4

TM-1

1

5

TM

-1

0

2

TM-1

1

4

TM

-1

0

0

TM-1

1

7

TM-1

1

6

TM-9

8

TM-6

8

TM-156

< SYMPTOM DIAGNOSIS >

[7AT: RE7R01A (VQ35HR)]

SYSTEM SYMPTOM

Symptom

Diagnostic item

Con

trol

li

nk

ag

e

Outp

ut sp

ee

d

s

e

n

s

or

Acc

e

le

ra

to

r pe

da

l p

o

s

iti

on

se

ns

or

En

gi

ne

sp

ee

d si

g

n

a

l

Ba

tte

ry vo

lt

a

g

e

T

ran

sm

is

si

on

ran

ge

s

w

itc

h

S

to

p

lam

p

swit

ch

Li

ne

pre

s

s

u

re

s

o

le

no

id

va

lv

e

T

o

rqu

e

c

o

nv

erte

r c

lut

ch

so

le

no

id

va

lv

e

Lo

w bra

k

e

s

o

le

no

id

v

a

lv

e

Fron

t

b

rak

e so

le

noi

d va

lve

High

a

n

d

lo

w rev

e

rs

e

cl

utc

h

so

len

o

id

v

a

lv

e

Inp

ut

cl

utc

h

so

le

no

id

va

lv

e

Di

re

ct cl

utch

so

le

no

id

va

lv

e

23

46

bra

k

e

s

o

leno

id

v

a

lv

e

Ant

i-in

terl

oc

k

so

le

noi

d va

lve

S

tarter relay

TM-16

7

TM

-7

6

TM-10

3

TM

-7

8

TM-1

1

9

TM

-7

1

TM-12

7

TM

-9

7

TM

-9

4

TM-1

1

5

TM-10

2

TM-1

1

4

TM-10

0

TM-1

1

7

TM-1

1

6

TM

-9

8

TM

-6

9

Function
trouble

Power transmis-
sion cannot be
performed

Vehicle cannot run in all position.

3

2

1

1

1

1

1

1

1

1

1

Driving is not possible in “D” posi-
tion.

3

2

1

1

1

1

1

1

1

1

1

Driving is not possible in “R” posi-
tion.

3

2

1

1

1

Engine stall

3

4

4

5

2

1

Engine stalls when selector lever
shifted “N”

→

“D” or “R”.

3

4

4

2

1

Engine does not start in “N” or “P”
position.

3

1

2

1

Engine starts in position other than
“N” or “P”.

3

2

1

Poor operation

Vehicle does not enter parking con-
dition.

1

2

Parking condition is not cancelled.

1

2

Vehicle runs with A/T in “P” position.

1

2

Vehicle moves forward with the “R”
position.

1

2

Vehicle runs with A/T in “P” position.

1

2

Vehicle moves backward with the
“D” position.

1

2

PRECAUTIONS

TM-157

< PRECAUTION >

[7AT: RE7R01A (VQ35HR)]

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PRECAUTION

PRECAUTIONS

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"

INFOID:0000000005250141

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.

WARNING:

• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in

the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.

• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal

injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the “SRS AIR BAG”.

• Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this

Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-
ness connectors.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

WARNING:

• When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the

ignition ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s)
with a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly
causing serious injury.

• When using air or electric power tools or hammers, always switch the ignition OFF, disconnect the

battery, and wait at least 3 minutes before performing any service.

General Precautions

INFOID:0000000005250142

• Turn ignition switch OFF and disconnect the battery cable

from the negative terminal before connecting or disconnect-
ing the A/T assembly harness connector. Because battery
voltage is applied to TCM even if ignition switch is turned
OFF.

• Perform “DTC (Diagnostic Trouble Code) CONFIRMATION

PROCEDURE” after performing each TROUBLE DIAGNOSIS.
If the repair is completed DTC should not be displayed in the
“DTC CONFIRMATION PROCEDURE”.

• Always use the specified brand of ATF. Refer to

MA-12, "Fluids

and Lubricants"

.

• Use lint-free paper not cloth rags during work.
• Dispose of the waste oil using the methods prescribed by law, ordi-

nance, etc. after replacing the ATF.

• Before proceeding with disassembly, thoroughly clean the outside

of the transmission. It is important to prevent the internal parts from
becoming contaminated by dirt or other foreign matter.

SEF289H

SEF217U

TM-158

< PRECAUTION >

[7AT: RE7R01A (VQ35HR)]

PRECAUTIONS

• Disassembly should be done in a clean work area.
• Use lint-free paper or towels for wiping parts clean. Common shop rags can leave fibers that could interfere

with the operation of the transmission.

• Place disassembled parts in order for easier and proper assembly.
• All parts should be carefully cleaned with a general purpose, non-flammable solvent before inspection or

reassembly.

• Gaskets, seals and O-rings should be replaced any time the A/T is disassembled.
• It is very important to perform functional tests whenever they are indicated.
• The valve body contains precision parts and requires extreme care when parts are removed and serviced.

Place disassembled valve body parts in order for easier and proper assembly. Care will also prevent springs
and small parts from becoming scattered or lost.

• Properly installed valves, sleeves, plugs, etc. will slide along bores in valve body under their own weight.
• Before assembly, apply a coat of recommended ATF to all parts. Apply petroleum jelly to protect O-rings and

seals, or hold bearings and washers in place during assembly. Never use grease.

• Extreme care should be taken to avoid damage to O-rings, seals and gaskets when assembling.
• Clean or replace ATF cooler if excessive foreign material is found in oil pan or clogging strainer. Refer to

TM-

158, "Service Notice or Precaution"

.

• When the A/T drain plug is removed, only some of the ATF is drained. Old ATF will remain in torque con-

verter and ATF cooling system.
Always follow the procedures under “Changing” when changing ATF. Refer to

TM-160, "Changing"

.

• Occasionally, the parking gear may be locked with the torque insufficiently released, when stopping the vehi-

cle by shifting the selector lever from “D” or “R” to “P” position with the brake pedal depressed.
In this case, the shock with a thud caused by the abrupt release of torque may occur when shifting the selec-
tor lever from “P” position to other positions.
However, this symptom is not a malfunction which results in the damage of parts.

Service Notice or Precaution

INFOID:0000000005250143

ATF COOLER SERVICE

If ATF contains frictional material (clutches, bands, etc.), or if an A/T is repaired, overhauled, or replaced,
inspect and clean the A/T fluid cooler mounted in the radiator or replace the radiator. Flush cooler lines using
cleaning solvent and compressed air after repair. For A/T fluid cooler cleaning procedure, refer to

TM-163,

"Cleaning"

. For radiator replacement, refer to

CO-14, "Exploded View"

.