2000 MITSUBISHI MONTERO ECU

54A-2
CHASSIS
ELECTRICAL
CONTENTS
BATTERY 4
..............................
SERVICE SPECIFICATIONS 4..................
ON-VEHICLE SERVICE 4......................
Electrolyte Level and Specific Gravity Check 4..
Charging 5.................................
Battery Test 5...............................
IGNITION SWITCH AND IMMOBILIZER
6.....................
SPECIAL TOOLS 6............................
TROUBLESHOOTING 6........................
IGNITION SWITCH AND
IMMOBILIZER-ECU 11.........................
IGNITION SWITCH AND IMMOBILIZER
<4D56> 14...............................
SPECIAL TOOLS 14...........................
TROUBLESHOOTING 14.......................
IGNITION SWITCH AND IMMOBILIZER-ECU
19 ............................................
COMBINATION METER 23................
SERVICE SPECIFICATIONS 23.................
SEALANTS 24................................
SPECIAL TOOLS 24...........................
TROUBLESHOOTING 24.......................
ON-VEHICLE SERVICE 30.....................
Speedometer Check 30......................
Tachometer Check 30........................
Fuel Gauge Unit Check 31....................Engine Coolant Temperature Gauge Unit Check
32 .........................................
COMBINATION METER 33.....................
HEADLAMP ASSEMBLY 36...............
SERVICE SPECIFICATIONS 36.................
SPECIAL TOOLS 36...........................
TROUBLESHOOTING 36.......................
ON-VEHICLE SERVICE 36.....................
Headlamp Aiming Adjustment 36..............
Luminance Measurement 38..................
Headlamp Bulb Replacement 39...............
HEADLAMP ASSEMBLY 40....................
FOG LAMPS 41..........................
SERVICE SPECIFICATIONS 41.................
SPECIAL TOOLS 41...........................
TROUBLESHOOTING 41.......................
ON-VEHICLE SERVICE 41.....................
Fog Lamp Aiming Check 41...................
FOG LAMPS 44...............................
SIDE TURN-SIGNAL LAMPS 45...........
SPECIAL TOOLS 45...........................
SIDE TURN-SIGNAL LAMPS 46................
ROOM LAMP 46.........................
TROUBLESHOOTING 46.......................
CONTINUED ON NEXT PAGE


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CHASSIS ELECTRICAL-Ignition Switch and Immobilizer 54A-7
DIAGNOSIS CODE MEMORY ERASING PROCEDURE
Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points.
INSPECTION USING SIMPLE CHECK DIAGNOSIS MODE
1. Change to Simple Check Diagnosis mode and activate switch diagnosis mode.
(Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points.)
2. In this condition, the input signals for the following switches can be checked.
CHART CLASSIFIED BY DIAGNOSIS CODES
Code No.Diagnosis contentsReference
page
11Problem related to communication with the ignition key54A-7
12Ignition key is not registered, or encrypted code from ignition key does not match.54A-7
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
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-7.)
Replace the immobilizer-ECU.
Register the ignition key.
If code No. 11 is
output
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.


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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


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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>?


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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


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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


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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


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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.


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