Mitsubishi 3000GT Workshop Manual Supplement page 54

cHASSls
ELECTRICAL
-
tgnition switch and tmmobitizer system
54-4
Inspection Procedure
4
Engine does not start (turns over but does not ignite)
Probable cause
It
the.
fuel injectors are not operating,
there might be
a
problem with
the
Mpl
system
in
addition
to
a
malfunction
of
the immobilizer
system.
It is normal for this
to occur if
an attempt is made to
start the engine using a
key
that has not been properly
registered.
.
Malfunction of
MPI
system
o
Malfunction of
immobilizer
system
Checkthe system voltage during crank-
ing.
OK:
8V
or
more
ls a normal diagnosis code
outputlrom
the
immobilizer-ECU?
To diagnosis code classilication table
(Refer to
P.il-2.1
ls
a normal diagnosis code output trom
the
engine-Eou?
Refer to GHOUP
13 -
Troubleshooting.
To
inspection prccedure for when
there
is no
ignition (Refer
to
GROUP 13
-
Troubleshooting.)
Checkthe hamess between
the
immobi-
lizer-EoU power circuit and
the
earth
circuit.
(Refer to
inspection
lnspection Procedure
5
lmmobillzer-ECu power circuit and earth circuit check
Measure
at
immobilizer-ECU conn€ctor
c-90.
.
Disconnect
the
@nnector
and
measure
at the
hamess
side.
.
lgnition switch:
ON
(1)
Voltage between terminal
No. 7
and
body
earth
OK:
System
voltage
(2) Contlnuity between terminal No.
3
and
body
earth
OK:
Continuity
Check the followlng
connectorc.
c-21 (LHD),
C-60 (RHD),
C-90
Check
the
hamess
botyseen thc
immobi-
lizer-EoU
and
lhe
engine control relay,
and
repair
if
necessary.
Checkthe hamoss b€tweenthe immobi-
lizer-ECU
and the body earth, and
repair
if
necessary.