Mitsubishi 3000gt 1999 - Page 52

CHASSIS
ELEGTRICAL
-
lgnition
switch and tmmobitizer
system 54-2
Code No. 12
lD
codes
are not the
same
or are not
registered
Probable
cause
The lD
code which
is
sent
from
the transponder
is not
the
same as the lD
cooe
which
is registered
in the immobilizer-ECU.
o
The lD
code in
the
ignition
key
being used has
nol
been
properly
registered.
.
Malfunction
of immobilizer-EOU
li";m':"1'lffi
l
INSPECTION
CHART FOR
TROUBLE
SYMPTOMS
Trouble
symptom
Inspection
procedure
No. Reference
page
Communication
with the MUT-II
is not
possible
1
54-2
Diagnosis
code No.
54 has
been
generated
by the
engine-ECU
2
54-3
lD code
cannot
be
registered
using the MUT-II
3
54-3
Engine
does not
start
(turns
over
but does not ignite)
4
54-4
lmmobilizer-ECU
power
circuit
and earth
circuit check
5
54-4
INSPECTION
PROCEDURE
FOR
TROUBLE
SYMPTOMS
Inspection
Procedure
1
Communication with
the MUT-II
is not
possible.
Probable
cause
The
cause is
probably
a malfunction
of the
diagnosis line
or the immobilizer-EOu
is
not functioning.
o
Malfunctiofi
of diagnosis
line
.
Malfunction
of harness
or
connector
.
Malfunction
of immobilizer-ECU
Check the following
connectors.
c-70, c-90
Check the
engine-EOU
power
supply
and
earth circuit, and repair
if necessary.
Can the MUT-II
communicate with
the
engine-ECU?
Disconnect
the engine-ECU
connector
C-99
and
immobilizer-ECU
connector
C-90
and measure
at the harness
side
.
Continuity
between
the C-99
terminal No.
91 and
C-90 terminal
No. 5
OK: Continuity
Check
the following
connectors.
c-90,
c-99
Check the harness
wire
between the
engine-ECU
and immobilizer-ECU,
and
repair
if necessary.
Check the harness
between the
immo-
bilizer-EoU
power
circuit and the
earth
circuit.
(Refer
to inspection
procedure
5.)
!)