Isuzu KB P190. Manual — part 1222

7D1-14 TRANSFER CONTROL SYSTEM

2H to 4H retrial

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

2H

Off

Off

Off

Off

No

operation

1,0,1,0

Open

Open

Open

-----

4H start

of

operation

Off Off Off Off

4H

position

for 0.1

second

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

Start of

operation

Blinking

(2HZ)

Off Off 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)

(Go to 4H

if synchro

complete)

Blinking

(2HZ)

Off Off 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

X 2

Abandon

ed

operation

(2H)

Blinking

(4HZ)

Off Off Off

No

operation

1,0,1,0 Open Open Open

Return to

2H

2H

indication

after

10second

s

Off

Off

Off

Off

No

operation

1,0,1,0

Open

Open

Open

-----

• Completion of transfer case H-L area and axle shift timing may cause some variation in the 2Hz blinking pattern.

TRANSFER CONTROL SYSTEM 7D1-15

Operational limits (4H

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

4H

On

Off

Off

Off

Open

0,0,1,1

Closed

Open

Closed

-----

4H start

of

operation

On Off Off Off

4L

position

for 0.1

second

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

10

second

display

during

limitation

On

Blinking

(4HZ)

Off Off Open

0,0,1,1

Closed

Open

Closed

No

operation

during

limitation

Go to 4H

after 10

seconds

On

Off

Off

Off

Open

0,0,1,1

Closed

Open

Closed

-----

Operational limits (4L

4H)

(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

On

On

Off

Off

No

operation

1,1,0,1

Closed

Open

Closed

-----

4L start of

operation

On On Off Off

4H

position

for 0.1

second

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

10

second

display

during

limitation

On

Blinking

(4HZ)

Off Off Open

1,1,0,1

Closed

Open

Closed

No

operation

during

limitation

Go to 4L

after 10

seconds

On

On

Off

Off

No

operation

1,1,0,1

Closed

Open

Closed

-----

• Under some conditions, a secondary operational indication may be received when the 4Hz operational indication

is present.

7D1-16 TRANSFER CONTROL SYSTEM

Transfer-related indicator lamp and switch function

Skip operation

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

-----

4L start of

operation

Off Off Off Off

4L

position

for 0.1

second

1,0,1,0 Open Open Open

Switch

operation

sensor

Start of

operation

Blinking

(2HZ)

Blinking

(2HZ)

Off 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)

Blinking

(2HZ)

Blinking

(2HZ)

Off 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

Blinking

(2HZ)

Off Off

No

operation

0,0,1,1 Closed Open Open

-----

During

operation

(Passing

through

4H)

Off

Blinking

(2HZ)

Off Off

No

operation

0,0,1,1

0,1,0,1

Closed Open Open -----

During

operation

(N)

On

Blinking

(2HZ)

Off

Off

No

operation

0,0,1,1

0,1,0,1

Closed

Open

Closed

-----

During

operation

(N)

On

Blinking

(2HZ)

Off Off

No

operation

0,1,0,0 Closed Open Closed

Switch

operation

sensor

During

operation

(N)

On

Blinking

(2HZ)

Off Off

No

operation

0,0,1,1 Closed Open Closed

4H to 4L

while

driving

During

operation

(Axle

drive)

Blinking

(2HZ)

Blinking

(2HZ)

Off Off

No

operation

0,0,1,1 Closed Open Open

-----

Axle

waiting

Blinking

(2HZ)

Blinking

(2HZ)

Off Off

No

operation

0,0,1,1 Closed Open Open

-----

4L waiting

On

Blinking

(2HZ)

Off Off

No

operation

1,1,0,1 Closed Closed Closed

4H to 4L

while

waiting

4L

On

On

Off

Off

No

operation

1,1,0,1

Closed

Open

Closed

-----

TRANSFER CONTROL SYSTEM 7D1-17

Item

4WD

lamp

4L lamp

Neutral

lamp

Check

4WD

lamp

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 start

of

operation

On On Off Off

2H

position

for 0.1

second

1,1,0,1 Closed Open Closed

Switch

operation

sensor

During

operation

Blinking

(2HZ)

Blinking

(2HZ)

Off Off

No

operation

1,1,0,1 Closed Open Closed

4L to 4H

while

driving

During

operation

(Passing

through

N)

On

Blinking

(2HZ)

Off Off

No

operation

1,1,0,0 Closed Closed Closed

4L to 4H

through

neutral

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

(4H

waiting)

Off

Blinking

(2HZ)

Off Off

No

operation

0,0,1,1 Closed Closed Closed

4L to 4H

while

waiting

During

operation

(Axle)

Off while

waiting for

start of H

shift

Blinking

(2HZ)

while

waiting for

start of H

shift

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) at

end of H

shift

Off at end

of H shift

Off Off

No

operation

0,1,1,1

0,1,1,0

0,0,1,0

1,1,1,0

Closed 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

-----

• Completion of transfer case H-L area and axle shift timing may cause some variation in the 2Hz blinking pattern.