immobilizer MITSUBISHI MONTERO 2000 Service User Guide

CHASSIS ELECTRICAL-Ignition Switch and Immobilizer 54A-8
INSPECTION PROCEDURES FOR EACH TROUBLE SYMPTOM
Trouble SymptomInspection
procedure
No.Reference page
Communication with MUT-IIis not possible.–GROUP 13B,
13C - Trouble-
shooting
Diagnosis code No. 54 is generated by the engine-A/T-ECU <6G74-A/T> or by the
engine-ECU <6G74-M/T, 4M41>.154A-8
The ignition keys cannot be registered using the MUT-II.254A-9
The engine does not start.(The engine cranks but does not fire.)354A-9
Immobilizer-ECU power supply and earth circuit system check454A-10
INSPECTION PROCEDURES FOR EACH TROUBLE SYMPTOM
Inspection procedure 1
Diagnosis code No. 54 is generated by the engine-
A/T-ECU <6G74-A/T> or by the engine-ECU <6G74-M/T,
4M41>.
Probable cause
The cause is probably a problem with communication between the
engine-A/T-ECU <6G74
-A/T> orengine-ECU <6G74-M/T, 4M41>
and the immobilizer-ECU.
D
Malfunction of harness or connector
D
Malfunction of engine-A/T-ECU
<6G74-A/T> or engine-ECU
<6G74-M/T, 4M41>
D
Malfunction of immobilizer-ECU
D
Malfunction of ignition key
D
The ignition key has not been registered
with the immobilizer-ECU.
NG
NG OK
Immobilizer-ECU power supply and earth circuit system check
(Refer to Inspection Procedure 4.)
OK
Check the trouble symptoms.
NGRepair
NGCheck the following connectors:D-202-1, D-202, E-13,
D-122<6G74-A/T>, D-118<6G74-M/T>, D-112<4M41>
Repair
NGCheck the harness between the engine-A/T-ECU <6G74-A/T>
or engine-ECU <6G74-M/T, 4M41> and the immobilizer-ECU,
and repair if necessary.
Replace the immobilizer-ECU.
Check the trouble symptoms.
Check the trouble symptoms.Replace the engine-A/T-ECU <6G74-A/T> or engine-ECU
<6G74-M/T, 4M41>.OK
Is a normal diagnosis code output from the immobilizer-ECU?
YESTo Chart Classified by Diagnosis Codes (Refer to P.54A-7.) NO
NG


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk

CHASSIS ELECTRICAL-Ignition Switch and Immobilizer 54A-9
Inspection procedure 2
The ignition keys cannot be registered using the MUT-II.
Probable cause
The ignition key has not been registered with the immobilizer-ECU.
Or that thee is a problem with the immobilizer-ECU.D
Malfunction of ignition key
D
Malfunction of harness or connector
D
Malfunction of immobilizer-ECU
Register the ignition key.
YES
NO YESIs a normal diagnosis code output?
NOCan none of the ignitionkeys beregistered?Replace the ignition key that cannot be registered.
To Chart Classified by Diagnosis Codes (Refer to P.54A-7.)
OKImmobilizer-ECU power supply and earth circuit system check
(Refer to Inspection Procedure 4.)
NG
Replace the immobilizer-ECU.
Check the trouble symptoms.
Inspection procedure 3
The engine does not start.
(The engine cranks but does not fire.)
Probable cause
If the fuel injection does not operate, the cause is probably a problem
with the immobilizer-ECU, or it could also be a problem with the GDI
system or the DIESEL system. If an attempt has been made to start
the engine with a key that has not been properly registered, the
above symptom is a sign of normal operation.D
Malfunction of GDI system or Diesel
fuel system
D
Malfunction of immobilizer-ECU
NGBattery check (P.54A-4)
YES
NO
Refer to GROUP 13B, 13C - Troubleshooting.YES
NO
To Chart Classified by Diagnosis Codes (Refer to P.54A-7.)Is a normal diagnosis code output from the immobilizer-ECU?
OK
Voltage check during cranking
OK:8V or higher
NG
OKImmobilizer-ECU power supply and earth circuit system check
(Refer to Inspection Procedure 4.)
NG
Replace the immobilizer-ECU.
Check the trouble symptoms.
Check the trouble symptoms.
NG
To inspection procedures if the enginedoes not fire
(Refer to GROUP 13B, 13C - Troubleshooting.)
Is a normal diagnosis code output by the engine-A/T-ECU
<6G74-A/T> or by the engine-ECU <6G74-M/T, 4M41>?


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk

CHASSIS ELECTRICAL-Ignition Switch and Immobilizer <4D56>54A-15
INSPECTION PROCEDURES FOR EACH DIAGNOSIS CODE
Code No. 11 Problem related to communication with the
ignition keyProbable cause
When the ignition switch is at the ON position, the encrypted codes
are not transmitted from the ignition key to the immobilizer-ECU.D
Malfunction of ignition key
D
Malfunction of immobilizer-ECU
D
Malfunction of harness or connector
YES
NOCan otherkeys which havebeen registered beused to start
the engine?
If code No. 12 is
output
Check the diagnosis codes.To inspection procedure 12 classified by diagnosis code
(Refer to P.54A-15.)
Check the following connectors:D-133, D-201
Register the ignition key.
If code No. 11 is
output
OK
NG
Check the trouble symptoms.
Check the harness between the immobilizer-ECU and the
ignition key ring antenna.NG
OKNG
Check the trouble symptoms.
Replace the immobilizer-ECU.NGRepair
Repair
Replace the ignition key which cannot start the engine.
Code No. 12 Ignition key is not registered, or encrypted
code from ignition key does not match.Probable cause
The ignition key has not been registered with the immobilizer-ECU.D
The ignition key has not been registered
with the immobilizer-ECU.
D
Malfunction of immobilizer-ECU
OK
NG
Replace the immobilizer-ECU.
Check the trouble symptoms.Register the encrypted code.
INSPECTION PROCEDURES FOR EACH TROUBLE SYMPTOM
Trouble SymptomInspection
procedure
No.Reference page
Communication with MUT-IIis not possible.–GROUP 13B,
13C - Trouble-
shooting
The ignition keys cannot be registered using the MUT-II.154A-16
The engine does not start. (The engine cranks but does not fire.)254A-17
Immobilizer-ECU power supply and earth circuit system check354A-18


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk

CHASSIS ELECTRICAL-Ignition Switch and Immobilizer <4D56>54A-16
INSPECTION PROCEDURES FOR EACH TROUBLE SYMPTOM
Inspection procedure 1
The ignition keys cannot be registered using the MUT-II.
Probable cause
The ignition key has not been registered with the immobilizer-ECU.
Or that there is a problem with the immobilizer-ECU.D
Malfunction of ignition key
D
Malfunction of harness or connector
D
Malfunction of immobilizer-ECU
OK
Check the trouble symptoms.
NG
Register the ignition key.
YES
NO YESIs a normal diagnosis code output?
NOCan none of the ignitionkeys beregistered?Replace the ignition key that cannot be registered.
To Chart Classified by Diagnosis Codes (Refer to P.54A-14.)
OKImmobilizer-ECU power supply and earth circuit system check
(Refer to Inspection Procedure 3.)
NG
Replace the immobilizer-ECU.
Check the trouble symptoms.
OK
Check the trouble symptoms.
NG
Repair
Check the harness between the immobilizer-ECU and the
diagnosis connector.
Repair
Check the following connectors:D-133, D-33, D-222, D-28
NG
NG


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk

CHASSIS ELECTRICAL-Ignition Switch and Immobilizer <4D56>54A-17
Inspection procedure 2
The engine does not start.
(The engine cranks but does not fire.)
Probable cause
If the fuel injection does not operate, the cause is probably a problem
with the immobilizer-ECU, or it could also be a problem with the
diesel fuel system. If an attempt has been made to start the engine
with a key that has not been properly registered, the above symptom
is a sign of normal operation.D
Malfunction of diesel fuel system
D
Malfunction of immobilizer-ECU
NGBattery check (P.54A-4)
YES
NOTo Chart Classified by Diagnosis Codes (Refer to P.54A-14.)Is a normal diagnosis code output from the immobilizer-ECU?
OK
Voltage check during cranking
OK:8V or higher
NG
Immobilizer-ECU power supply and earth circuit system check
(Refer to Inspection Procedure 4.)
Check the trouble symptoms.
NG
To inspection procedures if the enginedoes not fire
(Refer to GROUP 13B, 13C - Troubleshooting.)
OK
Check the trouble symptoms.
NG
OK
NG
Replace the immobilizer-ECU.
Check the trouble symptoms.
OK
Check the trouble symptoms.
NG
Repair
Check the harness between the immobilizer-ECU and the fuel
cut valve controller.
Repair
Check the following connectors:D-133, D-13, B-03


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk

CHASSIS ELECTRICAL-Ignition Switch and Immobilizer <4D56>54A-21
ENCRYPTED CODE REGISTRATION METHOD
AND RESETTING THE CODE TO THE
FACTORY SETTING
Register the encrypted code in the immobilizer-ECU and then
reset the code to the factory setting after parts have been
replaced.
Replacement partEncrypted
code
Ignition keyNecessary
Ignition key ring antenna and immobilizer-ECUNecessary
Engine-ECU*Necessary
NOTE
* : If the engine-ECU is replaced, the ignition key ring antenna
and immobilizer-ECU and ignition key should be replaced
together with it.
Each engine-ECU has an individual information for
immobilizer-ECU, and the individual information is registered
in the immobilizer-ECU.
ENCRYPTED CODE REGISTRATION METHOD
If using an ignition key that has just been newly purchased,
or if the immobilizer-ECU has been replaced, you will need
to register the encrypted codes for each ignition key being
used into the immobilizer-ECU. (A maximum of eight different
encrypted codes can be registered.)
Moreover, when the immobilizer-ECU has been replaced, you
will need to use the MUT-II
to register the password that
the user specifies into the immobilizer-ECU. (Refer to the
MUT-II
instruction manual for instructions on using the MUT-II
.)
Caution
Because registering of the encrypted codes is carried
out after all previously-registered codes have been
erased, you should have ready all of the ignition keys
that have already been registered.


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk

54A-1
CHASSIS
ELECTRICAL
CONTENTS
GENERAL 2.................................
Outline of Changes 2...........................
General Information 2..........................
Construction Diagram 3.........................
IMMOBILIZER SYSTEM 5.....................
COMBINATION METER 5.....................
Troubleshooting 5..............................
RV METER 6................................
Troubleshooting 6..............................
RV meter 23...................................
GLASS ANTENNA 24........................
Antenna feeder cable 24........................


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk

SWS -Troubleshooting54B-43
Inspection Procedure P-3
Key reminder switch signal is not sent to the ETACS-ECU.Probable cause
The key reminder switch input signal is used to operate the following devices. If
the signal fails, these devices will not work normally.
DForgotten key prevention function
DKeyless entry system
DIgnition key hole illuminaiton lamp
DRoom lamp dimming functionDMalfunction of key reminder switch
DMalfunction of ETACS-ECU
DMalfunction of harness wire or connector
NG
Replace
OK
NG
NG
Repair
NG
Check the harness wire between key reminder switch and body
earth.
OK
NG
Repair
NG
NG
Repair
OK
Replace the ETACS-ECU.
Check the harness wire between key reminder switch and ETACS-
ECU.
OK
Check trouble symptoms.
Check the following connectors:
D-202, D-226
Measure at key reminder switch connector D-202.
DDisconnect connector and measure at harness side.
DContinuity between terminal 4 and body earth.
OK:Continuity
OK
Check trouble symptoms.
Check the following connectors:
D-202, D-30
Check the key reminder switch. (Refer to GROUP 54A – Ignition
Switch and Immobilizer System.)
Inspection Procedure P-4
Hazard warning lamp switch signal is not sent to the
ETACS-ECU.Probable cause
The hazard warninglampswitch input signal is used to operate the following
devices. If the signal fails, these devices will not work normally.
DHazard warninglamp
DKeyless entry system (Registering the encrypted code)DMalfunction of hazard warninglampswitch
DMalfunction of ETACS-ECU
DMalfunction of harness wire or connector
NG
Replace
OK
NG
NG
Repair
NG
Check the harness wire between hazard warninglampswitch and
body earth.
OK
NG
Repair
NG
NG
Repair
OK
Replace the ETACS-ECU.
Check the harness wire between hazard warninglampswitch and
ETACS-ECU.
OK
Check trouble symptoms.
Check the following connectors:
D-104, D-226
Measure at hazard warninglampswitch connector D-104.
DDisconnect connector and measure at harness side.
DContinuity between terminal 2 and body earth.
OK:Continuity
OK
Check trouble symptoms.
Check the following connector:
D-104
Check the hazard warninglampswitch. (Refer to GROUP 54A
– Hazard WarningLampSwitch.)


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk