Mitsubishi 3000gt 1997 - SRS IG1 (B) POWER CIRCUIT DIAGNOSIS

SRS
-
Troubleshooting
528-9
Code No.42
lG1
(B) power
circuit
system
Probable
cause
]frl;
Qqagnosis.,code
is outpu.t
if
the voltage
between
the lG1 (B)
terminal
and the
eann rs
tower
tnan
the
specified
value
for
a continuous
period
of
5 seconds
or
more.
However,
rt
the vehicle
condilio_n
returns
lo normal,
diajnosis
code
No.42
will
be
automatically
erased,
and
the
SRS warning
lamp
will
switch
off.
.
Malfunction
of wiring
harnesses
or connectors
SRS
check
harness
(M89e1613)
Measure
at
SRS
check
harness
connector (5).
o
Disconnect
SRS-ECU
connector
D-51.
o
Connect
SRS
check harness
connector (3).
.
Continuity
between
terminals
(20)
and
(21)
OK:
Continuity
Check
the
following
connectors:
C-74,
C-78 and
D-51
Check
the harness
wire
between
the
SRS-ECU
and
earlh,
and
repair
if necessary.
Measure
at SRS
check
harness
connector
(5).
.
Disconnect
SRS-ECU
connector
D-51 .
' '
.
Connect
SRS
check
harness
connector
(3).
.
Connect
negative
battery
cable
.
lgnition
switch:
ON
.
Y91taS9
between
terminal (13)
and
body
earth
OK:
9Vormore
Check_
the
following
connectors:
C-79
and D-51
Check
the
harness
wire
between
the
SRS-ECU
and ignition
switch
lG1,
and repair
if
necessary.
o
0,