Mitsubishi MOTORS Space Runner 1998, Workshop Manual

Page: 1022 / 1164

CHASSIS ELECTRICAL -
Ignition Switch and Immobilizer System
54-10
Inspection Procedure 3
Engine does not start (cranking but no initial combustion). Probable cause
If the fuel injectors are not operating, there might be a problem with the GDI 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.
D Malfunction of the GDI system
D Malfunction of the immobilizer-ECU
Check the system voltage during crank-
ing.
OK:
8V or more
NG
Check the battery
(Refer to P.54-4.)
OK
Is a normal diagnosis code output from
the immobilizer-ECU?
NO
To INSPECTION CHART FOR DIAG-
NOSIS CODE (Refer to P.54-7.)
YES
Is a normal diagnosis code output from
the engine-ECU?
NO
Refer to GROUP 13A or 13B - Trouble-
shooting.
YES
To inspection procedure for when there
is no initial combustion. (Refer to
GROUP 13A or 13B - Troubleshooting.)
NG
Check trouble symptoms.
NG
Check the immobilizer-ECU power sup-
ply and earth circuit (Refer to INSPEC-
TION PROCEDURE 4.)
OK
Check trouble symptoms.
NG
Replace the immobilizer-ECU.
Inspection Procedure 4
Malfunction of the immobilizer-ECU power supply and earth circuit
Measure at the immobilizer-ECU con-
nector 1.
D Disconnect the connector and
measure at the harness side.
(1) Voltage between 1 and earth
OK:
System voltage
(2) Continuity between 4 and earth
OK:
Continuity
(1)NG
Check the following connector:
B-82, B-14, A-14X
NG
Repair
OK
Check trouble symptoms.
NG
Check the harness wire between immo-
bilizer-ECU and engine control relay and
repair if necessary.
(2)NG
Check the following connector:
B-82
NG
Repair
OK
Check trouble symptoms.
NG
Check the harness wire between immo-
bilizer-ECU and body earth and repair
if necessary.