Diagnostic Trouble Codes (Dtcs): 21 , 23, 25,29 - Honda Prelude 1993 Service Manual

-Th6 4WS indicalor light hss
b6on rooorlod on,
-V\fth sorvica check connecto.
.iumpod cod6s 21 , 23. 25, 29
ato indicatod.
Disconnect the rear main steering
angre sensor connector.
Turn the ignition switch ON.
Measure voltage between the
4WS conlrol unit side connector
No. 1 terminal (RED) and body
grouno.
Ropair open in thg hahoss wire
bolweon tho No.22 4WS fuse
and the reaa main gtoering tngla
sensot.
ls there battery voltage?
Disconnecl the 4WS control unit
18P connector.
Check tor continuity belwoen the
4WS control unit No. 6 terminal
(WHI/GRN) and body ground.
Repair short in the WHT/GRN wire
betwecn tho 4WS controlunit and
the main steering angle sensor,
Connect the 4WS control unit
18P connector.
Measure voltage between the
4WS control unit No. 6 terminal
{WHT/GRN} and body ground.
ls there approximately 4.5 V?
Repair opon in th6 WHT/GRN wi.o
botwoon the 4WS contol unit and
the aoaa main stooring angle
sensot.
Diagnostic Trouble Codes (DTCs): 21 , 23, 25,29
YES
REAR MAIN STEERING ANGLE SENSOR
4WS CONTROL UNIT SIDE CONNECTOR
Measure the voltage between the
4WS control unit side No.3 termi
nal {WHT/GRN} and body ground.
REAR MAIN STEERING ANGLE SENSOR
4WS CONTBOL UNIT SIDE CONNECTOR
\\.) JJ
t . . t t l t I
w
\:/ Battery voltaqo?
I
View from terminal side
View from terminal side
4WS CONTROL UNIT 18P
SENSOR SIDE CONNECTOR
ls there approximately 4.5 V?
YES
ls there continuity?
View from terminal side
4WS CONTROL UNIT 18P CONNECTOR
ReDlaco the 4WS control unir.
N O
I
J
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