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Troubleshooting
OTC 51 - 53: ABS Pump Motor (cont'd)
(From page
19-(9)
I
Check
the
pump motor
circuit:
1.
Remove the
pump
motor
relay.
2.
Turn
the
ignition switch
ON (II).
3.
Connect the pump motor relay
connector +8
and
MOTOR
ter-
Check for an open
in the pump
minals with
a jumper
wire
for
motor
+B
circuit:
a moment
.
1.
Turn the ignition switch
OFF.
2.
Discon nect
the pump motor
connecto r.
'-...
NO
3.
Turn
the
ignition switch
ON
(II).
Does
the
pump motor
operate?
/'
4.
Connect the
pump motor
relay
co
nnector
+8
and MOTOR
ter-
YES
mioa
ls
with
a jumper
wire.
5.
Measure the voltage between
the
pump motor
co
nnector
terminal No. 1
and body
ground.
'-...
Is there battery
vottage?
/'
YES
Check the pump motor opera-
tion:
Connect the
battery
(+.
terminal
to
the pump motor
connector
termi·
nal
No. 1,
and
the (-)
terminal to
the terminal
No.
2
for
a
moment.
Does the
pump
moto
r
operate?
/
YES
Check 'or
a
short
to body ground
Repair open
in
the wire between
in
the PMR
circuit:
the pump motor
and
body
ground.
1.
Turn
the
ignition
switch
OFF,
or poor ground (G3S1j.
2.
Disconnect
the
ASS
control
unit
22P conn
ector.
3.
Check
for
co
ntinuity between
term
i
nal No
.
19
and
b
o
d
y
ground.
Repair short to body ground in
'-...
YES
the wire between
the
under
-
Is
there
conti
nuity?
/
hood ABS fuse/relay box
and
the
NO
ABS control
unit.
(To
page
19-51)
19-50
NO
UNDeR-HOOD ABS
FUSE/RELAY BOX
JUM~RWIRE
D~~~
ill,
~
MOT'
+~
TERMINAL
TERMINAL
PUMP MOTOR CONNECTOR
~OR+BIWHTJ
2
1
V
Term
ina
l
side of
female te
rminals
Repair open
in
the wire between
the
under·
hood ABS
fuse/relay
box
and
the
pump
motor,
MOTOR
+B
IREDJ
MOTOR GND IBLKJ
1 2
Term
inal
side of
BATTERY
male
I
I
terminals
NO
Replace the modulator
unit.
(Faulty
pump
motor'
ABS CONTROL UNIT
22P CONNECTOR
=
r n
/l/!4!/I/l7
1/1/1
,0111
1
1
121/1 14:/1
/
1171
/I
191./121 1
22
1
PMR
IYEL/RED~
Wi
re side
of
female term inal
s
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