4Ws Control Unit Terminal Arrangement - Honda Prelude 1993 Service Manual

Troubleshooting (4WS)
4WS CONTROL UNIT Terminal Arrangement
18P CONNECTOB (AI
12P CONNECTOR (B)
4P CONNECTOR (C)
1 9 2 0
2 2
2 3
2 4 2 5
2 6 1 , /
2 8
View from control unit terminal side
POWER TERMINAL ID}
l
2
3
4
5
6
7
8
1 0
1 3
1 4
1 5 1 6 1 7 1 8
con_
necror
con-
necror
N o .
W i r e c o l o r
Termanal name
Check
Measurement
condition
Normal
voltage
Measuremt
termimals
G R Y / R E D R e a r r i g h t p u l s e
While the wheel is
being rotated slowly
5 V - O V
1 - 2 4
2 W H T / B L U C h a r g e
Engine ON
Battery voltage.
2 - 2 4
Engine OFF
O V
3
GRY/WHT
Rear left pulse
While the wheel is
being rotated slowly
5 V - O
3 - 2 4
B L K / Y E L lgnition 2
I G S W O N
Battery voltage
4 - 2 4
I G S W
OFF, ACC, START
O V
5 RED
Rear main steering
angle sensor ground
I G S W O N
O V
5 -ground
6
W H T / G R N
Rear main steerang
angle sensor A phase
While actuator motor
is running slowly
5 V - O V
6 - 2 4
1
PNK Warning 1
Light ON
O V
Lisht OFF
Battery voltage
I G R N
Front main steering
angle sensor A phase
While steering wheel
is being rotated slowlY
5 V - O V
8 - 2 4
I
1 0
B R N / W H T
Service check signal
Short
O V
1 0 - 2 4
Open
5 V ( A T : 1 l V )
1 1
1 ' )
BLU
Front main steerlng
angle sensor Z phase
While steering wheel
is being rotated slowlY
5 V - 0 V
1 2 , 2 4
1 3 B L U / G R N
Rear main steerrng
angle sensor B phase
While actuator motor
is running slowly
5 V € O V
1 4
G R N / R E D Parking brake
O N
O V
1 4 - 2 4
O F F
Battery voltage
I D
YEL/RED
Front main steerlng
angle sensor B phase
While steering wheel
is being rotated slowlY
5 V - 0 1 5 , 2 4
BLK
Ground 2
I G S W O N
O V
1 6 - g r o u n d
1 7
G R Y / Y E L
Rear sub steering
anble sensor center
Analog tester DC
range
a p p r o x .
2 . 5 V
1 7 - 2 4
1 8
WHT/YEL I Back up Power source
At all times
Battery voltage
1 8 - 2 4
17 -34
s w i t c h , A C C :accessory {'l position)