CHASSIS ELECTRICAL ± Ignition Switch and Immobilizer System
54A-11
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 MPI 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 MPI system
D Malfunction of the immobilizer-ECU
Register the password (secret code)
and encrypted code (Refer to
P.54A-15.)
Check the system voltage during crank-
ing.
OK: 8V or more
NG
Check the battery
(Refer to P.54A-5.)
OK
Is a normal diagnosis code output from
the immobilizer-ECU?
NO
To INSPECTION CHART FOR DIAG-
NOSIS CODE (Refer to P.54A-8.)
YES
Is a normal diagnosis code output from
the engine-ECU?
NO
Refer to GROUP 13B or 13C ± Trouble-
shooting.
YES
To inspection procedure for when there
is no initial combustion. (Refer to
GROUP 13A ± 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.
D Turn the ignition switch to ON
position.
(1) Voltage between 1 and earth
OK: System voltage
(2) Continuity between 4 and earth
OK: Continuity
(1)NG
Check the following connector:
A-43X, C-29, C-62,
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:
C-02, C-62
NG
Repair
OK
Check trouble symptoms.
NG
Check the harness wire between immo-
bilizer-ECU and body earth and repair
if necessary.
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