v-mac iii.pdf

8/11/2019 V-MAC III.pdf

1/4

SCHEMATICS

AN

D

DIAGRAruS

Vehicle

Electronic

Control Unit

(VECU)

Connectors

The

Vehicle

Electronic

Controf

unit

(VECU)

has

:nree

1B

pin

connectors.

Each

pin

is

marked

on

ihe

rnside

of

the

connector.

To

disconnect

a

ccnnector

from

the

vECU,

press

down

on

the

iang

of

the

harness

connector

and

gently

pull

the

:cnnector

frorn

the VECU.

Be

sure that

the

tonnector

is

aligned

as shown

below

to

avoid

lcnfusion

when

checking

pin

numbers.

The

.onnector

number

and

color

are

shown

as

a

,ef

erence

for

reconnecting

the VECU

to

the

cab

n

arness.

Figure

791

-

VECU

Connectors

VEHICLE

ELECTRONIC

CONTROL

UNIT

(VECU)

CONNECTOR

PIN

DESIGNATIONS

VECU

Connector

J1

Description

lgnition

key

switch

Stader

signal

Buffered

vehicle

speed

output

(Speedometer

Signal)

Buffered

RPM

output (Tachometer

Signal)

Shutdown

override

siqnal

Speed gontrol

OJ/Of

f

s*rcn

rig"ul

Speed

control

SETiDECEL

signail

Speed

control

RESUfv,lE/ACCEL

srgnal

Cfutch

engaged

signal

'

---

Parking

brake

signal

(#t)

Service

brake

signal

Engine

brake

switch

--

low

Engine

brake

switch

-

hictn

Not

used

Fan

clutch

override

Not

used

Not

used

Fuel

level

sensor

srgrriil

16

13

'to

7

4

I

l-l

l-l

l-t

-r

t--r

I-

t-r

t-l

t-r

E

r-r

I-r

16

13

l0

/ 4

I

I-r

I--r

t-l

t-l

f-t

l-t

l-l

I-t

r-r

-l

--r

l--r

l-l r-l

r-l

f-t

l-r

t-r

lu

15

1?

f_)

6

-l

16

13

10 7 4

1

l-l

-r

r-r

E

l-t

t-l

l-l

l-l

t-r

l-t

r-r

I-t

t-r l-r

t--t t-r

-t

r--r

18

15

12

9 i

3

CONNECTORS

PaEe

635


2/4

SCHETI,IATICS

AN

D

DIAG

RAMS

VECU

Connector

J2

PfO

2 (when

selected)

Vehicle

speed

sensor

pLUS

(_)

Vehicle

speed

sensor

Mf

NUS

Parking brake

sign

al

(#2)

cAt'l-T

1

CAI.J

-T2

Description

VECtReference

ground

Transmission-oil

temperature

signal

Front

drive

axle

temperature

signi

Rear

drive

axle

temperature

signaf

Not

used

(spare

relay)

Not

used

Exhaust

temperature

sensor

signal

Exhaust

temperature

sensor

return

PTO

1

selected

Engne

Electronc

control

unt

(EECU)

Connectors

(ASETTM

IEGR

Engine)

The

Engine

Electronc

Control

Unit

(EECU)

has

two

43

pin

connectors.

To

disconnect

a

connectorfrom the

EECU,

pufr

back

on

the

connector

rock

and

gently

pulf

the

connector

back

on

its

heel

and

away

from

the

EECU.

For

easy

reference,

the

following

if

lustration

shows

ean pn

number

as

t

appears

on

the

connector.

Be

sure

that

the

connector

is

aligned

as

shown

below

to

avoid

confusion

when

checking

pin

numbers.

The

connector

number

and

EECU

orientation

are

shown

as

a

reference

fo

r

reconnecting

the

EECu

to

the

engine

harness.

792

-

EEcu

connectors

(ASETTM

rEGR

Engine)

|.

VECU

Connector

J3

J

|

93e

&ta

finfr

high

.llffigEa-t,r,lrbt

Th

ftle,Sss{

fon

s

nstr

refufn

$a

s"O

1spre-*,

re

r

arara

j

Jl5.fl s..rrni

,JatE

l.rrf

B

MUS

i:i

Description

finononfffi-n-n

n-q

EDDDD

rD000iloatrDDrl

F,f,-'o-o-'ffiooooo%1

oo00D

000000

DDDnFET -o"iln"n"rj

CONNEGTORS

Fig

u re

'3qe


3/4

SCHEMATICS

AND

DIAGRAMS

I

ENGNE

ELECTRONIC

CONTROL

UNIT

(EECU)

CONNECTOR

pfN

DESIGNATIONS

(ASETTH

IEGR

ENGTNE)

EECU

Connector

J1

Description

Not

used

(Engine

oil

level

sensor)

Not

used

Not

used

Not

used

Engine oil

temperature

sensor

srgnal

Not

used

Air

conditioning pressure

switch

Waslegate

solenoid

control

Fan

clutch

solenoid

control

Electronic

unit

pump

injecto

r

# 1

Electronic

unit pump

injector

#5

Electronic

unit pump

injector

#O

Not

used

(Engine

oil level

sensor)

Not

used

Boost

ar

pressure

sensor

slgnal

Not

used

Coofant temperature

sensor

signal

Engine

posltion

sensor

return

Engine position

sensor

signal

Engine brake

#2 control

Engine

brake #1

control

EECU

Connector

Jl

PIN

Number

Description

22 Electronic

unit

purnp

injecto

r

#2

23

Electronic

unit

pump

injecto

r

#3

24

Efectronic

unit

pump

injecto

r #4

25

Oil

pressure

sensor

return

26 Temperature

sensor

common

return

27 Intake

air temperature

sensor signal

2B Fuel

temperature

sensor

signal

29 Not

used

30

RPM/TDC

sensor

signal

31 RPM/TDC

sensor return

32

Oil

pressure

sensor voltage

reference

33 Not

used

34

Engine

oil

pressure

sensor

signal

35

Boost

air

pressure

sensor

return

36

Boost

air

pressure

sensor

voltage

reference

37

Not

used

3B

Not

used

39 Not

used

.40

41

Not

used

Rear

bank

electronic

unrt

pump

irrector

sofenoid

voltage

supply

42

Front

bank

electronic

unlt

pump

injector

solenoid

voltage

supply

Not

t-sed

3

Paqe

63


4/4

SCHEMATICS

AN D

DIAGRAMS

EECU Connector

J2

PIN

Number

Description

I

Not used

2

Not used

3

Engine

coolant level

sensor signal

4

Not

used

5

Not used

I

6 Not used

a

Not

used

B

I

J

1939 data

link

high

tJot used

12

volts

f

rom

power

relay

Not

used

o,"*;sg';r*r

Not used

Not used

Not usc-d

fuot

ut"O

I'Jot

used

Not used

-Gr

,;",J

--

lJot

used

-

oiil*,i

1 2

vo

lts f ro

rn

poy/

e:r

r

elay

-ti"i

;e

Chassrs

clround

EECU

Connector

J2

PIN

Number Description

25

Not used

,>

26 Engine coolant

level

sensor

return

>

27

Ambient

air

temperature sensor

return

2B

Not used

29

Ambient

air

temperature

sensor signal

30

Not

used

31 J

1 587 serial

data

link

(+)

32

Not

used

a

33

Not

used

34

Not used

35

l'Jot

used

36

Not

used

37

Not

used

3B J

1

587 serial

data link

(-)

39

J 1 939

data

link low

.10

Not

used

41 12 volts

f

rom

power

relay

42

Not used

43

Chassis ground

'

\

n- ^.- :?e

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