Mitsubishi Montero Sport (2004+). Manual — part 515
IGNITION SWITCH
TSB Revision
CHASSIS ELECTRICAL
54-47
STEP 6. Check the harness wires between
immobilizer-ECU connector C-107 (terminal No.10 and 11)
and ignition key ring antenna connector D-28 (terminal
No.1 and 2).
Q: Are the harness wires between immobilizer-ECU
connector C-107 (terminal No.10 and 11) and ignition
key ring antenna connector D-28 (terminal No.1 and 2)
in good condition?
YES : Replace the immobilizer-ECU. Then register the
password (secret code) and encrypted code
Confirm that diagnostic trouble code 11 is not output.
NO : Repair them. Confirm that diagnostic trouble code 11
is not output.
DTC12: Encrypted Codes are not the Same or not Registered.
.
DTC SET CONDITION
The encrypted code which is sent from the transponder is not
the same as the encrypted code which is registered in the
immobilizer-ECU.
NOTE: DTC 12 is always output together with MFI system DTC
P1610.
.
TROUBLESHOOTING HINTS
• The encrypted code in the ignition key being used has not
been properly registered.
• Malfunction of immobilizer-ECU
.
DIAGNOSIS
STEP 1. Check that the encrypted code was registered.
Q: Was the encrypted code registered?
YES : Replace the immobilizer and then re-register the
encrypted code (Refer to
.)
NO : Register the encrypted code (Refer to
AC202606
C-107
1
2
7
6
3
4
5
12 11 10 9 8
CONNECTOR: C-107
AC
COMPONENT SIDE
AC202095
2
1
COMPONENT SIDE
AC
D-28
CONNECTOR: D-28
1
2
IGNITION SWITCH
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CHASSIS ELECTRICAL
54-48
SYMPTOM CHART
M1543007201183
SYMPTOM PROCEDURES
INSPECTION PROCEDURE 1: Communication with Scan Tool MB991958 is Impossible.
SYMPTOM
INSPECTION
PROCEDURE NO.
REFERENCE PAGE
Communication with scan tool MB991958 is impossible.
1
Registering the ignition key is impossible.
2
The "SECURITY" indicator does not illuminate.
3
Engine does not start (Cranking but no initial combustion).
4
JOINT
CONNECTOR (5)
JOINT
CONNECTOR (5)
POWERTRAIN
CONTROL
MODULE
MULTIPORT
FUEL
INJECTION RELAY
IMMOBILIZER-
ECU
POWER
SUPPLY
CIRCUIT
Immobilizer-ECU Power Supply, Ground and PCM Communication Line Circuit
IGNITION SWITCH
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CHASSIS ELECTRICAL
54-49
.
CIRCUIT OPERATION
Immobilizer-ECU is energized when the ignition
switch is turned "ON," and the engine control relay is
turned on. The powertrain control module transmits a
signal from scan tool MB991958 to the immobi-
lizer-ECU as it is. In the same way, a signal from the
immobilizer-ECU is also transmitted to scan tool
MB991958 as it is.
.
TECHNICAL DESCRIPTION (COMMENT)
• This malfunction may be caused by a defective
immobilizer-ECU, powertrain control module, or a
defect in the communication line between the
immobilizer-ECU and powertrain control module.
If this malfunction appears when the MFI system
and scan tool MB991958 can communicate each
other, MFI system DTC P0513 will reset.
• If the MFI system is normal, the MFI relay can be
determined as normal. In addition, if the MFI sys-
tem and scan tool MB991958 can communicate
each other, the circuits between the data link con-
nector and the powertrain control module can
determined as normal.
NOTE: If this malfunction appears, MFI system
DTC P0513 will be output.
.
TROUBLESHOOTING HINTS
• Malfunction of immobilizer-ECU
• Malfunction of powertrain control module
• Damaged harness wires or connectors
AC003451
CONNECTORS: C-14, C-59, C-92
AF
C-14
C-59
C-92 (GR)
AC003622
CONNECTOR: C-72
AD
C-72 (B)
AC003452
AC
CONNECTORS: C-85, C-107
C-85
C-107
IGNITION SWITCH
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CHASSIS ELECTRICAL
54-50
.
DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827: MUT-III USB Cable
• MB991911: MUT-III Main Harness B (Vehicles without
CAN communication system)
STEP 1. Using scan toll MB991958, read the MFI system
diagnostic trouble code.
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to "LOCK" (OFF) position before connect-
ing or disconnecting scan tool.
Use scan tool MB991958 to confirm the MFI system DTC.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch "ON" to position.
(3) Read the MFI system diagnosis code.
NOTE: If the scan tool MB991958 cannot communicate
with the MFI system, refer to GROUP 13A, MFI Diagnosis
−
Symptom Procedure
Q: Is an MFI system DTC P0513 output?
YES : Refer to GROUP 13A, MFI Diagnosis
− Diagnostic
Trouble Code Procedures
.
NO : Go to Step 2.
AK303629AB
MB991911
MB991827
MB991824
16-PIN
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