Infiniti Q45. Manual - part 576

EX-1

EXHAUST SYSTEM

B  ENGINE

CONTENTS

C

D

E

F

G

H

I

J

K

L

M

SECTION 

EX

A

EX

EXHAUST SYSTEM

PREPARATION ........................................................... 2

Special Service Tools  ............................................... 2
Commercial Service Tools ........................................ 2

EXHAUST SYSTEM  ................................................... 3

Checking Exhaust System  ....................................... 3
Removal and Installation  .......................................... 3

REMOVAL ............................................................. 4
INSTALLATION ..................................................... 5
INSPECTION AFTER INSTALLATION  ................. 5

DUAL MODE MUFFLER  ............................................ 7

Component Parts Location ....................................... 7
Wiring Diagram -VEXH-  ........................................... 8

Terminals and Reference Value for Dual Mode Muf-
fler Control Unit ......................................................... 9
Components Inspection ............................................ 9

EXHAUST CONTROL VALVE ............................... 9
DUAL MODE MUFFLER ACTUATOR ................... 9

Removal and Installation  ........................................ 10

REMOVAL (CABLE)  ............................................ 10
INSTALLATION (CABLE)  .................................... 10
REMOVAL (ACTUATOR)  .................................... 10
INSTALLATION (ACTUATOR) ............................. 11
REMOVAL (MUFFLER CONTROL UNIT) ........... 11
INSTALLATION ................................................... 11

EX-2

PREPARATION

PREPARATION

PFP:00002

Special Service Tools

NBS0028M

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.

Commercial Service Tools

NBS0028N

Tool number
(Kent-Moore No.)
Tool name

Description

KV10114400
(J-38365)
Heated oxygen sensor wrench

Loosening or tightening heated oxygen 
sensor 
For 22 mm (0.87 in) width hexagon nut

S-NT636

(Kent-Moore No.)
Tool name

Description

a: (J-43897-18)
b: (J-43897-12)
 oxygen sensor thread cleaner

Reconditioning the exhaust system threads 
before installing a new heated oxygen sensor 
(Use with anti-seize lubricant shown below.)
a: J-43897-18 [18 mm (0.71 in) dia.] for 
zirconia heated oxygen sensor and air fuel 
ratio sensor 
b: J-43897-12 [12 mm (0.47 in) dia.] for 
titania heated oxygen sensor

(

—

)

Anti-seize lubricant (Permatex 133AR 
or equivalent meeting MIL 
specification MIL-A-907)

Lubricating heated oxygen sensor thread 
cleaner when reconditioning exhaust system 
threads

Power tool

Loosening bolts and nuts

AEM488

AEM489

PBIC0190E

EXHAUST SYSTEM

EX-3

C

D

E

F

G

H

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J

K

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M

A

EX

EXHAUST SYSTEM

PFP:20100

Checking Exhaust System

NBS0028O

Check exhaust pipes, muffler and mounting for improper attachment,
leaks, cracks, damage or deterioration.

●

If anything is found, repair or replace damaged parts.

Removal and Installation

NBS0028P

CAUTION:

●

Be sure to use genuine exhaust system parts or equivalents which are specially designed for heat
resistance, corrosion resistance, and shape.

●

Perform the operation with the exhaust system fully cooled down because the system will be hot
just after engine stops. 

●

Be careful not to cut your hand on the insulator edge.

SMA211A

EX-4

EXHAUST SYSTEM

REMOVAL

1.

Remove cable from exhaust control valve. Refer to Dual mode muffler, 

EX-10, "Removal and Installation"

.

2.

Disconnect harness connector of each heated oxygen sensor 2.

NOTE:
Information for parts installation/disassembly is as follows although the information is not needed in view
of installation/disassembly procedure.

●

Put marks to identify installation positions of each heated oxygen sensor 2.

●

The harness connector shape of heated oxygen sensor 2 is varying in right and left.

1.

Main muffler

2.

Actuator

3.

Gasket

4.

Ground cable

5.

Cable

6.

Mounting rubber

7.

Exhaust front tube

8.

Bracket

9.

Heated oxygen sensor 2 (bank2)

10.

Heated oxygen sensor 2 (bank1)

11.

Ring gasket

12. Bracket

13.

Bracket

14.

Gasket

15. Center muffler

16.

Center muffler

17.

Gasket

18. U-clamp

19.

Serration bolt

20.

Main muffler

A.

Vehicle with rear active steer

PBIC4210E