Mitsubishi Montero Sport (2004+). Manual — part 517
IGNITION SWITCH
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CHASSIS ELECTRICAL
54-55
STEP 10. Recheck for malfunction.
Q: Is a malfunction eliminated?
YES : The procedure is complete. (If no malfunction are
found in all steps, an intermittent malfunction is
suspected. Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
− How to
Cope with Intermittent Malfunction
.)
NO : Replace the immobilizer-ECU or powertrain control
module.
INSPECTION PROCEDURE 2: Registering the Ignition Key is Impossible.
.
TECHNICAL DESCRIPTION (COMMENT)
The transponder built-in ignition key or the immobi-
lizer-ECU is suspected to be defective.
.
TROUBLESHOOTING HINTS
• Malfunction of ignition key
• Malfunction of immobilizer-ECU
.
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)
IGNITION SWITCH
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CHASSIS ELECTRICAL
54-56
STEP 1. Using scan tool MB991958, read the 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 MB991958.
Use scan tool MB991958 to check if DTC 11 set.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch "ON" position.
(3) Read the immobilizer system diagnostic trouble code.
Q: Does DTC11 reset?
YES : Refer to
.
NO : Replace the ignition key that cannot be registered.
Then re-register the encrypted code. (Refer to
.) Check that the ignition key can be
registered. Then go to Step 2.
STEP 2. Recheck for malfunction.
Q: Is a malfunction eliminated?
YES : The procedure is complete. (If no malfunction are
found in all steps, an intermittent malfunction is
suspected. Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
− How to
Cope with Intermittent Malfunction
.)
NO : Replace the immobilizer-ECU.
AK303629AB
MB991911
MB991827
MB991824
16-PIN
IGNITION SWITCH
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CHASSIS ELECTRICAL
54-57
INSPECTION PROCEDURE 3: The "IMMOBILIZER" Indicator Light does not Illuminate.
.
JUNCTION
BLOCK
IMMOBILIZER-
ECU
IGNITION
SWITCH (IG1)
COMBINATION
METER
The "IMMOBILIZER" Indicator Light Circuit
AC003465
CONNECTORS: C-04, C-05
AD
C-04
C-05
AC003518
AD
CONNECTOR: D-06
JUNCTION BLOCK (FRONT)
D-06
AC003519
CONNECTOR: D-08
AD
JUNCTION BLOCK (REAR)
D-08
AC003448 AC
CONNECTOR: C-107
C-107
IGNITION SWITCH
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CHASSIS ELECTRICAL
54-58
CIRCUIT OPERATION
If the requirements for starting the engine are not sat-
isfied, the immobilizer-ECU flashes the "IMMOBI-
LIZER" indicator for 30 seconds.
.
TECHNICAL DESCRIPTION (COMMENT)
There may be burned out bulb of the "IMMOBI-
LIZER" indicator light or a malfunction of the combi-
nation meter (printed-circuit board) or
immobilizer-ECU.
NOTE: The "IMMOBILIZER" indicator light is shared
by the theft-alarm system. If a problem can not be
resolved, observe the theft-alarm system trouble-
shooting
.
.
TROUBLESHOOTING HINTS
• Burned out bulb of "IMMOBILIZER" indicator light
• Malfunction of combination meter (printed-circuit
board)
• Malfunction of immobilizer-ECU
• Damaged harness wires or connectors
.
DIAGNOSIS
Required Special Tool:
• MB991223: Harness Set
STEP 1. Check the "IMMOBILIZER" indicator light circuit of
immobilizer-ECU connector C-107.
(1) Remove the immobilizer-ECU and measure at the harness
side.
(2) Connect terminal 9 to the ground.
(3) Ignition switch "ON" position.
Q: Is the only "IMMOBILIZER" indicator light illuminate?
(other indicator lights are in good condition)
YES : Replace the immobilizer-ECU. Then register the
password (secret code) and encrypted code
.
NO : Go to Step 2.
STEP 2. Check the "IMMOBILIZER" indicator light.
(1) Remove the combination meter and remove the
"IMMOBILIZER" indicator light bulb.
(2) Check the bulb.
Q: Is the "IMMOBILIZER" indicator light damaged?
YES : Replace it.
NO : Go to Step 3.
AC002739
C-107 HARNESS CONNECTOR:
COMPONENT SIDE
AF
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