Mitsubishi 3000GT Workshop Manual Supplement page 28

35-12
SERVICE BRAKES -
ABS
Troubleshooting
Code No.51 Valve relay
Probable cause
.
Malfunction of
valve
relay
[Comment]
The ABS-ECU continually monitors the solenoid drive circuit.
ll
no cunent is being
supplied to a solenoid coil even though the solenoid valve relay
is
on, or
if
current
continues to be supplied to five
or more solenoid coils even though the solenoid
valve relay is
off, the ABS-ECU judges
that there
is
a
problem with the ABS valve
relay. This diagnosis code
is
lhen oulput.
a
a
a
Malfunction of wirinq harness or c\onnector
Malf
unction of
ABS--ECU
Malfunction of hydraulic unit
Valve relay inspection (Refer to
P.35-
21.'
Check
the harness between fusible
link No.7 and valve relay, and repair if
necessary.
Measure
at valve relay
connector A-
94.
a
Disconnect the connector and mea-
sure at the hamess side.
o
Voltage between
5
-
body earth
OK:
System
voltage
Measure at ABS-ECU conneclor E-10.
o
Disconnect
lhe connector
and
measure at the hamess side.
o
Resistance between 82-47
OK:
60
-
120
cr
Gheck the
followlng connectors.
A-94 and C-94 or C-96
Check
the
harness belween valve
relay and ABS-ECU, and repair
if
necessary.
Solenoid valve inspeclion
(Refer
to P.35-21.)
Measure al hydraulic unit connector
A-
78 and ABS-ECU connectors E-10.
.
Disconnect
the connector
and
measure at
the
harness side.
o
Continuity between
the
following
terminals
OK:
Continuity
HUside 1 2 3
4
tttl
ABS-ECU
30 31 78
79
side
Huside 5 6 7 I
llll
ABS-ECU
58 59 50
s1
side
Chsck
ths tollowlng connectors.
A-78, C-25
and
E-10
Check
the
harness between
the
hy-
draulic unit
and ABS-ECU, and
repair
if nec€ssary.
Chock
üa
followlng connectors.
A-Zl
and A-94
Measure at hydraulic unit connector A-
77 and valve relay connector A-94.
.
Disconnectthe connectorand mea-
sure at the harness side.
o
Gontinuity between the following
terminals
OK:
Continuity
HU
side
1l
I
Valve
relay
4
side
Check
the
harness between the
hy-
draulic unit and valve relay, and
repair
rr
necessary.
Fi
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