
ENGINE
A
ENGINE COOLING SYSTEM
SECTION CO CO
C
D
E
CONTENTS
VQ40DE Removal and Installation (Motor driven type) .........20
. F
PRECAUTION .............................................. 3
. WATER PUMP .................................................. 22
Exploded View ........................................................22
.
G
PRECAUTIONS .................................................. 3
. Removal and Installation ........................................22
.
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- WATER INLET AND THERMOSTAT ASSEM-
SIONER" .................................................................. 3
. BLY .................................................................... 27 H
Precaution Necessary for Steering Wheel Rota- Exploded View ........................................................27
.
tion After Battery Disconnect .................................... 3. Removal and Installation ........................................27
.
Precaution for Liquid Gasket .................................... 3 . I
WATER OUTLET AND WATER PIPING .......... 29
PREPARATION ........................................... 5
. Exploded View ........................................................29
.
Removal and Installation ........................................29
.
PREPARATION .................................................. 5
. J
Special Service Tool ................................................ 5
. SERVICE DATA AND SPECIFICATIONS
Commercial Service Tool ......................................... 5
. (SDS) ........................................................... 31
.
K
FUNCTION DIAGNOSIS .............................. 7
. SERVICE DATA AND SPECIFICATIONS
(SDS) ................................................................. 31
COOLING SYSTEM ........................................... 7
. Standard and Limit .................................................31
.
Cooling Circuit .......................................................... 7
. L
VK56DE
Schematic ................................................................ 8
.
PRECAUTION ............................................. 32
.
OVERHEATING CAUSE ANALYSIS ................. 9
. M
Troubleshooting Chart .............................................. 9
. PRECAUTIONS ................................................. 32
Precaution for Supplemental Restraint System
ON-VEHICLE MAINTENANCE ................... 11
. (SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
N
ENGINE COOLANT ..........................................11
. SIONER" ................................................................32
.
System Inspection .................................................. 11
. Precaution Necessary for Steering Wheel Rota-
Changing Engine Coolant ...................................... 12
. tion After Battery Disconnect ..................................32 .
Precaution for Liquid Gasket ..................................32 . O
ON-VEHICLE REPAIR ................................ 16
.
PREPARATION .......................................... 34
.
RADIATOR ........................................................16
. P
Exploded View ....................................................... 16
. PREPARATION ................................................. 34
Removal and Installation ........................................ 16
. Special Service Tool ...............................................34
.
Checking Radiator .................................................. 18
. Commercial Service Tool .......................................34
.
ENGINE COOLING FAN ...................................19
. FUNCTION DIAGNOSIS ............................. 36
.
Exploded View ....................................................... 19
.
COOLING SYSTEM .......................................... 36
Removal and Installation (Crankshaft driven type) 19 ....
Revision: October 2008 CO-1 2009 Pathfinder
Cooling Circuit ....................................................... 36
. Exploded View ....................................................... 49 .
Schematic .............................................................. 37
. Removal and Installation (Crankshaft Driven
Type) ...................................................................... 49
.
OVERHEATING CAUSE ANALYSIS ............... 38
. Removal and Installation (Motor Driven Type) ....... 50 .
Troubleshooting Chart ........................................... 38
.
WATER PUMP .................................................. 52
.
ON-VEHICLE MAINTENANCE .................. 40
. Exploded View ....................................................... 52
.
Removal and Installation ........................................ 52
.
ENGINE COOLANT .......................................... 40
.
System Inspection ................................................. 40
. THERMOSTAT AND WATER PIPING ............. 54
.
Changing Engine Coolant ...................................... 41
. Exploded View ....................................................... 54
.
Removal and Installation ........................................ 54
.
ON-VEHICLE REPAIR ............................... 45
.
SERVICE DATA AND SPECIFICATIONS
RADIATOR ....................................................... 45
.
Exploded View ....................................................... 45
.
(SDS) .......................................................... 56
Removal and Installation ....................................... 45
. SERVICE DATA AND SPECIFICATIONS
Checking Radiator ................................................. 47
. (SDS) ................................................................ 56
.
ENGINE COOLING FAN .................................. 49
. Standard and Limit ................................................. 56
.
Revision: October 2008 CO-2 2009 Pathfinder
PRECAUTIONS
< PRECAUTION > [VQ40DE]
PRECAUTION A
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT CO
PRE-TENSIONER" INFOID:0000000003939383
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along C
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. D
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.
WARNING: E