electrical system nissan cwb45

8/18/2019 electrical system nissan cwb45

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HOW TO READ WIRING DIAGRAM

CAUTION+ PRECAUTIONS FOR HANDLING ELECTRICAL UNITS+ Before servicing or repairing electrical parts, be sure the

ground cable and body grounding connection are discon-nected. The ignition switch should be turned off.

The electric wiring diagrams contained within this service manualuse abbreviations, symbols, and numbers. This chapter explainstheir meanings and how to read the wiring diagrams.

ABBREVIATIONThe parts abbreviation indicates the name, location and conditionof each part, such as a switch, meter, or light.

ON Switch on

OFF Switch off

ACC Accessory

ST Start

RH Right hand

LH Left hand

AOH Air over hydraulic brake

W/L Warning light

I/L Indicator light

MAIN H Main harness

INTRODUCTION

INTRODUCTION


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CIRCUIT CONNECTIONA circuit connection is indicated by lines showing the electric wiresconnecting the electrical devices.

CEL7058A

Wire size and color codeAs shown below, the number indicates the size of the wire (nominalsectional area of the conductor, mm2), and the letter at the end ofeach number indicates the color of the covering.

Wire color code and symbolThe color of a wire covering is indicated by an alphabetical symbol.There are two types of wire colors; one is of a unicolor, the other ofa ground unicolor with an identifying stripe color.

INTRODUCTION


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CEL6006A

Indication of joint between connectorsA single lead or wire is indicated by a connector at the joint in wiringdiagrams.Multiple leads or wires are indicated by terminals of a connector atthe joints. The connector style is separately indicated near the

joints to identify the terminals.

CEL7061A

Indication of joint between unit and connector(When unit is provided with terminals)When leads emerge directly from a unit or when a unit is providedwith a terminal connector, the terminal numbers corresponding tothe leads are indicated by the 1st connector counting from the unitas shown in the figure.

Indication of ground and batteryThe ground (GND) symbol is indicated only when a unit orcomponent is directly grounded to body metal (GND) without usinga lead. A combination of the ground and connector symbols areindicated for a unit or component which is grounded using a lead.

INTRODUCTION


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Indication of switchThe switches are illustrated as in the normal state. The switch which is off in the normal state is called a ‘‘normalopen switch’’, and that which is on in the normal state is called a ‘‘normal close switch’’.

INTRODUCTION


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CEL6010A

Indication of relayThe relays use normal open relays. As shown in the figure, thenormal open relay makes when it is operated. The relay that breaks

when it is operated is called a normal closed relay.Similar to conventional switches, relays are shown in the ‘‘OFF’’state in wiring diagrams.

CEL6011D

Circuit operation chartAll wiring diagrams show the relays in a ‘‘break’’ state in whichcurrent does not flow through the electrical components.With the exception of the above, relays which switch from oneposition to another, such as multi-position switches, are shown inthe circuit operation chart to clearly indicate the relationship of theconnections.

INTRODUCTION


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CEL6012C

Example 2a. The connector symbol is divided into 8 square sections which

indicates an 8-pole connector.

b. The white rectangular section at the top of the connectorsymbol indicates a ‘‘female’’ connector.

c. The four corners of the connector symbol are 90°so the symbolindicates an ‘‘M’’ type connector.

HOW TO TRACE CONNECTIONSWhen tracing a connection between two connections, match themwith connector guide placed on the other guide (as if you wereclosing a book). The squares facing each other in this condition arethe corresponding terminals. It is wrong to trace in parallel.

NOTE+ The connector guide is the positioning convex part of the

connector.

How to trace SMJ connectionsThe SMJ connector is designed so that each terminal position isindicated by an alphanumerical ‘‘address’’.Since only the ‘‘address’’ is indicated in wiring diagrams, the SMJconnector chart should also be used as a guide in determining aterminal position on the SMJ connector side.The terminals of the SMJ connector can be traced in a manner

i il t ti l t

INTRODUCTION


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How to trace respective system power supplyIn each wiring diagram, power supplies located upstream of the applicable fuses are abbreviated as shown inFigures EL-13-2 & EL-13-4.

To trace a power supply, the leading wiring diagrams (pages EL-13-1 to EL-13-4) should be referred to first andthe required power supply can be traced back from the applicable fuse.

ZEL340A

INTRODUCTION


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CONNECTORSThe symbol of a connector in the wiring diagram indicates the number of poles, type, and male or female shapeof the terminal from which the connector of an electrical device can be checked.

ILLUSTRATION OF CONNECTORS



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RELAY

CEL6-017



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BATTERY

Item

Type

Rated

voltage[V]

5-hour

ampere rate[AH]

20-hour rate

capacity[AH]

Charging

current[A]

115E41R

(NS120) 12 88 110 11

115E41R-MF

(NS120) 12 88 110 11

115F51

(N120) 12 96 120 12

115F51-MF(N120)

12 96 120 12

115F51-HB

(N120) 12 96 120 12

145F51

(NS150) 12 112 140 14

145F51-MF

(NS150) 12 112 140 14

145G51(N150)

12 120 150 15

145G51-MF

(N150) 12 120 150 15

195G51

(NX300-15) 12 140 170 17

BATTERY AND CIRCUIT PROTECTOR



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CT-019E

Inspection1. Check the electrolyte level.

The battery electrolyte should be maintained between the

upper and lower levels on the case. If low, add distilled water tothe specified level and charge the battery for at least 30minutes.

CEL1043A

2. Using a gravimeter, measure the specific gravity of the elec-

trolyte in each cell.Maintenance standard[Electrolyte temperature at 20°C (68°F)]

1.200 - 1.290

NOTE+ Read the indication at the upper end of the electrolyte

surface.+ The measured specific gravity of the electrolyte must be

corrected to the 20°C (68°F) standard.

S20 = St + 0.0007 (t − 20)Where,S20: Specific gravity of electrolyte at standard tempera-

ture 20°C (68°F)St: Specific gravity measured at t°Ct: Temperature of measured electrolyte (°C)



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WARNING+ Be careful not to spill battery electrolyte on any part of

your body, clothes or finished surfaces of parts.+ Do not touch your eyes with dirty hands. After handling

battery electrolyte, wash your hands thoroughly underrunning water.

+ If electrolyte should come into contact with your eyes,rinse the eyes for at least fifteen minutes and immedi-ately see a doctor.

3. Check that the battery and battery terminals are free fromcorrosion and dirt.

Charging the battery1. Charge the battery with a charger while measuring the specific

gravity of the electrolyte every 30 minutes. Charge until thespecific gravity reads between 1.25 and 1.29 for 3 consecutivereadings and all cells reach a voltage of 2.5 to 2.7 volts.

NOTE+ Charging should be done in a well ventilated area free from



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- MEMO -



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SCHEMATIC DIAGRAMThe schematic diagram illustrates how each harness (main harness, chassis harness, floor harness, floor upperharness, body side harness, etc.) is wired on the actual vehicle. Depending on the vehicle model, however, the

arrangements of the wires and units may sometimes be different, so the respective schematic diagrams mustbe carefully checked to see if they coincide with the arrangements in the actual vehicle.

HARNESS LAYOUT

HARNESS LAYOUT


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HARNESS LAYOUT


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M - 4 1

C i g a r e t t e l i g h t e

r

M - 4 2

S p a r e c o n n e c t o r

M - 4 3


M - 4 4

R o t a r y b e a c o n

s w i t c h

M - 4 5

A n t i - j a c k k n i f e s

w i t c h

M - 4 6

H o r n s e l e c t s w i t c h

M - 4 7

E x h a u s t t e m p e

r a t u r e g a u g e

M - 4 8

J u n c t i o n b l o c k

M - 4 9

T a c h o g r a p h h a r n e s s

M - 5 0

F l o o r u p p e r h a r n e s s ( U - 1 )

M - 5 1

C l u t c h s w i t c h

M - 5 2


M - 5 3

M e t e r c l u s t e r ( G r e e n )

M - 5 4

M e t e r c l u s t e r ( B r o w n )

M - 5 5

M e t e r c l u s t e r ( W h i t e )

M - 5 6

M e t e r c l u s t e r ( B l a c k )

M - 5 7

M e t e r c l u s t e r ( B l u e )

M - 5 8

O v e r s p e e d w a r n i n g l i g h t

M - 5 9

C o m b i n a t i o n s w i t c h

M - 6 0

S t a r t e r s w i t c h

M - 6 1

S e a r c h l i g h t s w

i t c h

M - 6 2

F o g l i g h t s w i t c h

M - 6 3

A c c e l e r a t o r s w i t c h

M - 6 4

L o w a i r b u z z e r

M - 6 5

F r a m e e a r t h

M - 6 6

D o o r h a r n e s s R

H ( D R - 2 )

M - 6 7

D o o r h a r n e s s R

H ( D R - 1 )

M - 6 8

B o d y s i d e h a r n

e s s ( B - 1 )

M - 6 9

E x h a u s t t e m p e

r a t u r e b u z z e r

M - 7 0

S p e e d l i m i t c o n

t r o l u n i t

M - 7 4

1 2 - s p e e d t r a n s

m i s s i o n c o n t r o l u n i t

M - 7 5

T r a n s m i s s i o n r e l a y N o . 3

M - 7 7

D i o d e

M - 8 1

T i m e r r e l a y

M - 8 2

A i r c o n d i t i o n e r

c u t r e l a y

M - 8 9

D i o d e

HARNESS LAYOUT


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HARNESS LAYOUT


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M - 3 8

T r a n s m i s s i o n P

T O s w i t c h

M - 3 9

T h i r d d i f f e r e n t i a l l o c k s w i t c h

M - 4 0


r

M - 4 1


r

M - 4 2


M - 4 3


M - 4 4

R o t a r y b e a c o n

s w i t c h

M - 4 6

H o r n s e l e c t s w

i t c h

M - 4 9

T a c h o g r a p h h a

r n e s s

M - 5 0

F l o o r u p p e r h a r n e s s ( U - 1 )

M - 5 1


M - 5 2


M - 5 3

M e t e r c l u s t e r ( G r e e n )

M - 5 4

M e t e r c l u s t e r ( B r o w n )

M - 5 5

M e t e r c l u s t e r ( W h i t e )

M - 5 6

M e t e r c l u s t e r ( B l a c k )

M - 5 7

M e t e r c l u s t e r ( B l u e )

M - 5 9

C o m b i n a t i o n s w i t c h

M - 6 0

S t a r t e r s w i t c h

M - 6 1

S e a r c h l i g h t s w

i t c h

M - 6 2

F o g l i g h t s w i t c h

M - 6 3

A c c e l e r a t o r s w i t c h

M - 6 4

L o w a i r b u z z e r

M - 6 5

F r a m e e a r t h

M - 6 6

D o o r h a r n e s s R H ( D R - 2 )

M - 6 7

D o o r h a r n e s s R H ( D R - 1 )

M - 6 8

B o d y s i d e h a r n

e s s ( B - 1 )

M - 7 1

S p r i n g b r a k e s w i t c h N o . 2

M - 7 2

R e c e p t a c l e

HARNESS LAYOUT


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HARNESS LAYOUT


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C - 3 7

T h i r d d i f f e r e n t i a l l o c k m a g n e t i c v a l v e

C - 3 8

T a i l h a r n e s s ( T

- 1 )

C - 3 9

S u b h a r n e s s ( F o r t r a c t o r )

C - 4 0

S u b h a r n e s s ( F o r t r a c t o r )

C - 4 1

F r a m e e a r t h ( F

o r t r a c t o r )

C - 4 2

R e a r c o m b i n a t

i o n l i g h t ( L H ) ( F o r t r a c t o r )

C - 4 3

L i c e n s e p l a t e l i g h t ( F o r t r a c t o r )

C - 4 4

B a c k b u z z e r ( F

o r t r a c t o r )

C - 4 5


i o n l i g h t ( R H ) ( F o r t r a c t o r )

C - 4 6

B a c k - u p l i g h t ( F o r t r a c t o r )

C - 4 7

A i r p r e s s u r e s w

i t c h

C - 4 8

T / M H i g h s w i t c

h

C - 4 9

T / M L o w s w i t c h

C - 5 0

T / M H i g h m a g n e t i c v a l v e

C - 5 1

T / M L o w m a g n

e t i c v a l v e

C - 5 2

S p r i n g b r a k e s

w i t c h

C - 5 3

E l e c t r i c h o r n ( h

o r n h i g h )

C - 5 4

E l e c t r i c h o r n ( h

o r n l o w )

C - 5 5

T / M s e l e c t s w i t c h ( F o r 1 2 - s p e e d T / M )

C - 5 6

S P L h i g h m a g n e t i c v a l v e ( F o r 1 2 - s p e e d T / M )

C - 5 7

S P L l o w m a g n e t i c v a l v e ( F o r 1 2 - s p e e d T / M )

C - 5 8

R a n g e h i g h m a g n e t i c v a l v e ( F o r 1 2 - s p e e d T / M

)

C - 5 9

R a n g e l o w m a g n e t i c v a l v e ( F o r 1 2 - s p e e d T / M )

C - 6 4

S p e e d s e n s o r

C - 6 5

A c t u a t o r

T - 1

C h a s s i s h a r n e s s ( C - 3 8 )

T - 2

F r a m e e a r t h

T - 3


i o n l i g h t ( R H )

T - 4


i o n l i g h t ( L H )

T - 5

L i c e n s e p l a t e l i g h t

T - 6

B a c k - u p l i g h t

T - 7

B a c k b u z z e r

T - 8

C h a s s i s h a r n e s s ( C - 6 4 ) ( E x c e p t f o r t r a c t o r )

HARNESS LAYOUT


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HARNESS LAYOUT


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C - 3 1

T i l t m o t o r

C - 3 2

T i l t m o t o r

C - 3 3

T i l t s w i t c h

C - 3 4

S p a r e

C - 3 5

F r a m e e a r t h

C - 3 6

F r a m e e a r t h

C - 3 7

T h i r d d i f f e r e n t i a l l o c k m a g n e t i c v a l v e

C - 3 8

T a i l h a r n e s s ( T

- 1 )

C - 3 9

S u b h a r n e s s ( S t o p l i g h t s w i t c h )

C - 4 0

J u m p e r c a b l e

C - 4 1

F r a m e e a r t h

C - 4 2

R e a r c o m b i n a t i o n l i g h t ( L H ) ( F o r t r a c t o r )

C - 4 3

L i c e n s e p l a t e l i g h t ( F o r t r a c t o r )

C - 4 4

B a c k b u z z e r ( F o r t r a c t o r )

C - 4 5

R e a r c o m b i n a t i o n l i g h t ( R H ) ( F o r t r a c t o r )

C - 4 6

B a c k - u p l i g h t (

F o r t r a c t o r )

C - 4 8

B r a k e f l u i d l e v e l s w i t c h ( F o r t r a c t o r )

C - 4 9

A i r b o o s t e r s t r o k e s w i t c h N o . 1 ( F o r t r a c t o r )

C - 5 0

A i r b o o s t e r s t r o k e s w i t c h N o . 2 ( F o r t r a c t o r )

C - 5 3

E l e c t r i c h o r n ( h o r n h i g h )

C - 5 4

E l e c t r i c h o r n ( h o r n l o w )

T - 1

C h a s s i s h a r n e s s ( C - 3 8 )

T - 2

F r a m e e a r t h

T - 3

R e a r c o m b i n a t i o n l i g h t ( R H )

T - 4

R e a r c o m b i n a t i o n l i g h t ( L H )

T - 5

L i c e n s e p l a t e l i g h t

T - 6

B a c k - u p l i g h t

T - 7

B a c k b u z z e r


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LOCATION OF ELECTRICAL UNIT


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RELAY (CAB SIDE)RHD model


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LOCATION OF ELECTRICAL UNIT


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CEL6028A

SUPER MULTIPLE JUNCTION (SMJ)Connector mounting bolt

: 3 - 5 N·m {0.3 - 0.5 kgfzm, 2.2 - 3.6 ftzlbf}

CEL6028B

FUSE

EARTH POINT

EARTH POINT


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CHASSIS SIDECDzCW series

EARTH POINT


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STARTING SYSTEM


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ENGINE COOLANT TEMPERATURE SENSORSpecifications

Temperature range −40 to 120°C (−40 to 248°F)

Rated resistance valve 1.011 - 1.411 kΩ

CEL5011C

Inspection

Using a tester (in ohm range), measure resistance values acrossthe sensor terminals at different test temperatures (see the follow-ing table).

Test temperature

°C (°F)

Current

mA

Resistance

kΩ

39 - 41 (102 - 106) 1 1.011 - 1.411

59 - 61 (138 - 142) 1 0.505 - 0.805

SUB STARTER SWITCHSpecifications

Rated voltage V 24

Voltage drop V 0.3 or less in 4 amperes

Operation power N {kgf, lbf} 20 - 39 {2 - 4, 4 - 9}


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METER CLUSTER


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CEL6120K

Removing the meter cluster1. Move the steering wheel away from the meter cluster as far as

possible by operating the tilt/telescopic mechanisms.2. Remove the screws securing the meter cluster assembly.

3. Disconnect the tube from the air pressure gauge.4. Disconnect various connectors and speedometer cable from

the meter cluster assembly; remove the meter cluster assem-bly.

CEL6120L

Replacement of bulbs

Removing the speedometer or tachograph1. Remove the meter cluster. (For removal procedures, refer to

‘‘METER CLUSTER’’.)2. Remove the screws. Pull the speedometer (tachograph) as-

sembly out from the instrument panel.3. Disconnect the harness connectors and speedometer cable

from the speedometer (tachograph) assembly. Then removethe speedometer (tachograph) assembly.


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WARNI NG SYSTE M


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CEL6120R

LOW AIR PRESSURE WARNING BUZZERInspectionCheck the continuity, insulation and operation of the buzzer.

Rated voltage 24V

CEL5023C

AIR PRESSURE SWITCH

InspectionUsing a circuit tester (ohm range), check the switch to see that itmakes (body earth) and breaks the circuit under the specified airpressure.

Turn-on

pressure

Type I 422 - 481 kPa {4.3 - 4.9 kgf/cm2, 61 - 70 psi}

Type II 49 - 69 kPa {0.5 - 0.7 kgf/cm2, 7 - 10 psi}

Turn-off

pressure

Type I 422 - 530 kPa {4.3 - 5.4 kgf/cm2, 61 - 77 psi}

Type II 49 - 98 kPa {0.5 - 1.0 kgf/cm2, 7 - 14 psi}


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BACK UP LIGHT

LIGHTING SYSTEM


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CEL5052C

BACK-UP LIGHTSpecifications

Type I 24V 25W

Type II 24V 21W

CEL5052D

BACK-UP LIGHT SWITCHInspectionCheck the continuity between the terminals with a circuit tester(ohm range).L should be 23 to 24 mm (0.91 to 0.94 in) when the switch is off.


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SpecificationsMANUAL MODE

OPERATION SYSTEM


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MANUAL MODE

INPUT OUTPUT

Terminal

No. 1

Terminal

No. 4

Terminal

No. 5

Terminal

No. 6

Terminal

No. 7

IGN SW ⊕ MANUAL UP

SW

MANUAL

DOWN SW MOTOR (L)

MOTOR

(R, L)

ON

ON OFF ⊕ @

OFF ON @ ⊕

OFF OFF @ @

OFF ON/OFF ON/OFF @ @

AUTO MODE

INPUTMOTOR

RE-

VOLVING

CONDI-

TION

OUTPUT

Terminal

No. 1

Terminal

No. 2

Terminal

No. 3

Terminal

No. 6

Terminal

No. 7

IGN SW ⊕ AUTO UP

SW

AUTO

DOWN SW MOTOR (L)

MOTOR

(R, L)

ON

ON OFF

DRIVE ⊕ @

STOP @ @

OFF ONDRIVE @ ⊕

STOP @ @

OFF OFFDRIVE @ @

STOP @ @

OFF ON/OFF ON/OFF STOP @ @


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- MEMO -

ACCESSORY SYSTEM


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CHARGING SYSTEMRHD model

WIRING DIAGRAM


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LHD model

WIRING DIAGRAM


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AIR DRYER

WIRING DIAGRAM


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TRAILER AND SPRING BRAKE INDICATOR LIGHTRHD model

WIRING DIAGRAM


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AIR PRESSURE WARNING LIGHTRHD model

WIRING DIAGRAM


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LHD model

WIRING DIAGRAM


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LHD model

WIRING DIAGRAM


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AIR FILTER WARNING LIGHTRHD model

WIRING DIAGRAM


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CLUTCH DISC WEAR WARNING LIGHT

WIRING DIAGRAM


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HEADLIGHTRHD model (Except for Australia)

WIRING DIAGRAM


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RHD model (For Australia)

WIRING DIAGRAM


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BACK-UP LIGHTExcept tractor

WIRING DIAGRAM


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Tractor

WIRING DIAGRAM


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ROTARY BEACON LIGHT

WIRING DIAGRAM


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LHD model

WIRING DIAGRAM


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TRANSMISSION HIGH-LOW CHANGE SYSTEM

10-speed transmission

WIRING DIAGRAM


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THIRD DIFFERENTIAL LOCK SYSTEMRHD model

WIRING DIAGRAM


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LHD model

WIRING DIAGRAM


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electrical system nissan cwb45

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