Mitsubishi 3000gt 1997 - ABS MOTOR RELAY AND MOTOR DIAGNOSIS

SERVICE
BRAKES
-
ABS
Troubleshooting
35-13
Code No.53
Motor
relay,
motor
Probable
cause
These
codes
are output
at the followinq
times:
when
the motor
rela!
is on
bul no
sign-al is input
to the molor
monitor
line
(motor
is
not
operating,
etc.)
When
the
motor relay
is off
but
a signal is input
to the motor
monitor
line for
5
s.etonds
or more
(motor
continues
operating,
etc.)
When the
motor relav
does not ooerite
o
Malfunction
of motor relav
.
Malfunction
of wiring harness
or connector
.
Malfunction
of hvdraulic
unit
.
Malfunction
of ABS-ECU
Caution
Because
force'driving
of
the motor
by means
of the
actuator
test
will
drain
the
battery,
the
engine
should
be started
and
left to run
for
a while
after
testing
is
completed.
Check the
harnesses
between
the hv-
draulic
unrt
and ABS-ECU,
and repdir
rr necessary.
Repair
Check
the harness
between motor
relay
and ABS-ECU,
and repair if
nec-
essary.
Replace
the
hvdraulic
unit.
MUT-II
actuator
test
ls
the sound
of the motor
operating
head?
A?:-ffi"t
relav
insnection
(Rerer
to
Measure
at motor
relav
connector
A-
77.
.
Disconnect
the
connector
and mea-
sure
at the harness
side.
.
Voltage
between
5
-
body
earth
OK:
System voltage
Check the harness
between fusible
link
No.7
and motor relay,
and
repair
if
necessarv.
Measure
at ABS-ECU
connector
E-10.
.
Disconnect
the
connector
and mea-
sure
at the harness
side
.
Resistance
belween
77-82
OK:
78-88O
Measure
at ABS-ECU
connector
E-10.
.
Disconnect
the
connector
and mea-
sure at the harness
side.
.
Resistance
between
65
-
bodv
earth
OK: 0. 1-0.3O
Check the
harness
between
the hv-
draulic
unit and ABS-ECU,
and reodir
if
necessary.
Motor
earth. repair
if
necessary.
y.Blo_rrii"r",'"n
inspection (Refer
ro
Replace the
ABS-ECU.
Yes
Repair