Isuzu KB P190. Manual — part 1223

7D1-18 TRANSFER CONTROL SYSTEM

Skip operation limitations (4L

2H)

(Vehicle speed, engine speed, and transmission position not

specified)

Item

4WD

lamp

4L lamp

Neutral

lamp

Check

4WD

warning

light

4WD

switch

Actuator

detection

(limit)

switches

LS1, LS2,

LS3. and

LS4

1 = on

2 = off

Transfer

4WD

switch

Transfer

neutral

switch

SOF

actuator

switch

Or

Axle

dummy

Remarks

4L

Off

On

Off

Off

Open

1,1,0,1

Closed

Open

Closed

-----

4L start of

operation

Off On Off Off

2H

position

for 0.1

second

1,1,0,1 Closed Open Closed -----

10

second

display

during

limitation

Blinking

(4HZ)

Off Off Off Open

1,1,0,1

Closed

Open

Closed

No

operation

during

limitation

Go to 4L

after 10

seconds

Off

ON

Off

Off

Open

1,1,0,1

Closed

Open

Closed

-----

Skip operation limitations (2H

4L)

(Vehicle speed, engine speed, and transmission position not

specified)

Item

4WD

lamp

4L lamp

Neutral

lamp

Check

4WD

warning

light

4WD

switch

Actuator

detection

(limit)

switches

LS1, LS2,

LS3. and

LS4

1 = on

2 = off

Transfer

4WD

switch

Transfer

neutral

switch

SOF

actuator

switch

Or

Axle

dummy

Remarks

2HL

Off

Off

Off

Off

Open

1,0,1,0

Open

Open

Open

-----

4L start of

operation

Off Off Off Off

2H

position

for 0.1

second

1,0,1,0 Open Open Open -----

10

second

display

during

limitation

Blinking

(4HZ)

Blinking

(4HZ)

Off Off Open

1,0,1,0

Open

Open

Open

No

operation

during

limitation

Go to 2H

after 10

seconds

Off

Off

Off

Off

Open

1,0,1,0

Open

Open

Open

-----

Under some conditions, a secondary operational indication may be received when the 4Hz operational
indication is present.

TRANSFER CONTROL SYSTEM 7D1-19

Transfer-related indicator lamp and switch function

2H

→Neutral→2H

Item

4WD

lamp

4L lamp

Neutral

lamp

Check

4WD

warning

light

4WD

switch

Actuator

detectio

n (limit)

switches

LS1,

LS2,

LS3. and

LS4

1 = on

2 = off

Transfer

4WD

switch

Transfer

neutral

switch

SOF

actuator

switch

Or

Axle

dummy

Remarks

2H

Off

Off

Off

Off

No

operation

1,0,1,0

Open

Open

Open

-----

Neutral

start of

operation

Off Off Off Off

Neutral

position

for 10

seconds

1,0,1,0 Open Open Open

Switch

operation

sensor

Start of

operation

Off Off

Blinking

(2HZ)

Off

No

operation

1,1,1,0

0,0,1,0

0,1,1,0

0,1,1,1

Open Open Open

2H to 4H

while

driving

During

operation

(Synchro)

Off Off

Blinking

(2HZ)

Off

No

operation

1,1,1,0

0,0,1,0

0,1,1,0

0,1,1,1

Open Open Open

2H to 4H

using

synchro

and retrial

During

operation

(Passing

through

4H)

Off Off

Blinking

(2HZ)

Off

No

operation

0,0,1,1 Closed Open Closed -----

During

operation

(Passing

through

4H)

Off Off

Blinking

(2HZ)

Off

No

operation

0,0,0,1

0,1,0,1

Closed Open Closed

4H to 4L

while

driving

During

operation

(N)

Off

Off

Blinking

(2HZ)

Off

No

operation

0,0,0,1

0,1,0,1

Closed

Closed

Closed

4H to 4L

through

neutral

During

operation

(N)

Off Off

Blinking

(2HZ)

Off

No

operation

0,1,0,0 Closed Closed Closed

Switch

operation

sensor

Neutral

Off

Off

On

Off

No

operation

0,1,0,0

Closed

Closed

Open

-----

2H start

of

operation

Off Off On Off

2H

position

for 10

seconds

0,1,0,0 Closed Open Closed

Switch

operation

sensor

During

operation

(Passing

through

N)

Off

Blinking

(2HZ)

Off Off

No

operation

0,1,0,0 Closed Closed Closed

4L to 4H

through

neutral

During

operation

Off

Blinking

(2HZ)

Off Off

No

operation

0,1,0,1

0,0,0,1

Closed Closed Closed

4L to 4H

while

driving

7D1-20 TRANSFER CONTROL SYSTEM

Item

4WD

lamp

4L lamp

Neutral

lamp

Check

4WD

warning

light

4WD

switch

Actuator

detectio

n (limit)

switches

LS1,

LS2,

LS3. and

LS4

1 = on

2 = off

Transfer

4WD

switch

Transfer

neutral

switch

SOF

actuator

switch

Or

Axle

dummy

Remarks

During

operation

(4H

waiting)

Off

Blinking

(2HZ)

Off Off

No

operation

0,0,1,1 Closed Closed Closed

4L to 4H

while

waiting

During

operation

(Axle)

Blinking

(2HZ)

Off Off Off

No

operation

0,1,1,1

0,1,1,0

0,0,1,0

1,1,1,0

Closed Open Closed

2H to 4H

while

driving

During

operation

(Axle)

Blinking

(2HZ)

Off Off Off

No

operation

0,1,1,1

0,1,1,0

0,0,1,0

1,1,1,0

Open Open Closed

Axle

driving

Axle

waiting

Blinking

(2HZ)

Off

Off

Off

No

operation

1,0,1,0

Open

Open

Closed

-----

2H

Off

Off

Off

Off

No

operation

1,0,1,0

Open

Open

Open

-----

• Operational restrictions (vehicle speed, engine speed, and transmission position) are applicable to transfer shifts

in both directions (H

←→Neutral←→L).

TRANSFER CONTROL SYSTEM 7D1-21

4H

Neutral

4H

Item

4WD

lamp

4L lamp

Neutral

lamp

Check

4WD

warning

light

4WD

switch

Actuator

detection

(limit)

switches

LS1, LS2,

LS3. and

LS4

1 = on

2 = off

Transfer

4WD

switch

Transfer

neutral

switch

SOF

actuator

switch

Or

Axle

dummy

Remarks

4H

On

Off

Off

Off

No

operation

0,0,1,1

Closed

Open

Closed

-----

Neutral

start of

operation

On On Off Off

Neutral

position

for 10

seconds

1,1,0,1 Closed Open Closed -----

Start of

operation

Off Off

Blinking

(2HZ)

Off

No

operation

1,1,0,0 Closed Open Closed

4L to N

while

driving

During

operation

(N)

Off Off

Blinking

(2HZ)

Off

No

operation

1,1,0,0 Closed Closed Closed

4L to N

with axle

driving

During

operation

(N)

Off Off

Blinking

(2HZ)

Off

No

operation

0,1,0,0 Closed Closed Closed

4L to 4N

with axle

removed

During

operation

(Axle)

Blinking

(2HZ)

Off Off Off

No

operation

0,1,1,1

0,1,1,0

0,0,1,0

1,1,1,0

Open Open Closed

Axle

driving

Axle

waiting

Blinking

(2HZ)

Off

Off

Off

No

operation

1,0,1,0

Open

Open

Closed

-----

Neutral

Off

Off

On

Off

No

operation

0,1,0,0

Closed

Closed

Open

-----

4H start

of

operation

Off Off Off Off

2H

position

for 10

seconds

0,1,0,0 Open Open Open

Switch

operation

sensor

During

operation

(N)

Off

Blinking

(2HZ)

Off Off

No

operation

1,1,0,0 Closed Closed Open

4L to 4H

through

neutral

During

operation

(N)

Off

Blinking

(2HZ)

Off Off

No

operation

0,1,0,0 Closed Closed Open

4L to 4H

through

neutral

During

operation

Off

Blinking

(2HZ)

Off Off

No

operation

0,1,0,1

0,0,0,1

Closed Closed Open

4L to 4H

while

driving

4H

waiting

Blinking

(2HZ)

Off) Off Off

No

operation

0,0,1,1 Closed Closed Open

4L to 4H

while

waiting

During

operation

(Axle)

Blinking

(2HZ)

Off Off Off

No

operation

0,0,1,1 Closed Open Open

Axle

driving

Axle

waiting

Blinking

(2HZ)

Off

Off

Off

No

operation

0,0,1,1

Closed

Open

Open

-----

4H

On

Off

Off

Off

No

operation

0,0,1,1

Closed

Open

Closed

-----