Mitsubishi 3000gt 1997 - ABS COMMUNICATION FAULT INSPECTION PROCEDURES

35-16
SERVICE
BRAKES
-
ABS Troubleshooting
Inspection
procedure
2
Communication
with
MUT-II is not
possible.
(Communication
with ABS only
is not
possible.)
Probable cause
When communication
with the MUT-ll
is not
possible,
the cause
is
probably
an open
circuit
in the ABS-ECU
power
circuit or an open circuit
in the diagnosis
output circuit.
.
Blown fuse
o
Malfunction of wiring harness or connector
o
Malfunction
of ABS-ECU
Measure at diagnosis
connector C-70
and
ABS-ECU connector
E-10.
.
Disconnect the connector
and mea-
sure at
the harness side.
.
Continuity
between
the
following
terminals
OK: Continuity
ABS-ECU
38
68
side
Diagnosis connector
7
1
stoe
Check
the
following connectors.
C-27,C-70
and
E-10
Check
the harness between the ABS-
ECU and diagnosis connector, and
re-
pair
if necessary.
Gheck the
following connectors.
C-25, C-66
and C-78
Measure at
ABS-ECU connector
E-1 0.
.
Disconnect the
connector and
mea-
sure at the harness side.
o
lgnition switch
ON
.
Voltage between
83 body earth
OK: System
voltage
Measure
at
ABS-ECU connector
E-10.
o
Disconnect
the connector and
mea-
sure at the
harness side.
.
Continuity
between
55, 56
-
body
earth
OK: Continuity
Check the
harness
between
fuse No.3
inside the
junction
block
and
ABS-
ECU, and repair
if necessary.