Mitsubishi Galant 9G. Manual — part 1540
IGNITION SWITCH
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CHASSIS ELECTRICAL
54A-32
STEP 2. Check the immobilizer indicator light circuit of
immobilizer-ECU connector C-124.
(1) Disconnect the immobilizer-ECU connector C-124 and
measure at the harness side.
(2) Turn the ignition switch to the "ON" position.
(3) Connect terminal 5 to the ground.
Q: Does only the 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 3.
STEP 3. Check immobilizer-ECU connector C-124 and
combination meter connector C-101 for loose, corroded or
damaged terminals, or terminals pushed back in the
connector.
Q: Are immobilizer-ECU connector C-124 and combination
meter connector C-101 in good condition?
YES : Go to Step 4.
NO : Repair or replace the component(s). Refer to GROUP
00E, Harness Connector Inspection
. Confirm
the immobilizer indicator light illuminate normally.
AC305231CQ
CONNECTOR: C-124
HARNESS SIDE
AC306468
AC306468
CONNECTOR C-124
(HARNESS SIDE)
AG
AC305232
CONNECTORS: C-101, C-124
C-124
C-124
HARNESS SIDE
AX
C-101
HARNESS SIDE
C-101
IGNITION SWITCH
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CHASSIS ELECTRICAL
54A-33
STEP 4. Check the wiring harness between combination
meter connector C-101 (terminal 19) and immobilizer-ECU
connector C-124 (terminal 5).
Q: Is the wiring harness between combination meter
connector C-101 (terminal 19) and immobilizer-ECU
connector C-124 (terminal 5) in good condition?
YES : Go to Step 5.
NO : Repair the wiring harness. Confirm the immobilizer
indicator light illuminate normally.
STEP 5. Measure the voltage at combination meter
connector C-101 in order to check the battery circuit of
power supply system to the combination meter.
(1) Turn the ignition switch to the "LOCK" (OFF) position.
(2) Disconnect combination meter connector C-101, and
measure at the wiring harness side.
(3) Measure the voltage between terminal 1 and ground.
• The measured value should be approximately 12 volts
(battery positive voltage).
Q: Does the measured voltage correspond with this range?
YES : Go to Step 8.
NO : Go to Step 6.
AC305232
CONNECTORS: C-101, C-124
C-124
C-124
HARNESS SIDE
AX
C-101
HARNESS SIDE
C-101
AC305231CT
CONNECTOR: C-101
HARNESS SIDE
AC209365
CONNECTOR C-101
(HARNESS SIDE)
HT
IGNITION SWITCH
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CHASSIS ELECTRICAL
54A-34
STEP 6. Check combination meter connector C-101 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is combination meter connector C-101 in good
condition?
YES : Go to Step 7.
NO : Repair or replace the component(s). Refer to GROUP
00E, Harness Connector Inspection
. Confirm
the immobilizer indicator light illuminate normally.
STEP 7. Check the wiring harness between combination
meter connector C-101 (terminal 1) and the battery.
NOTE: Also check intermediate connector C-29 and joint con-
nector C-01 for loose, corroded, or damaged terminals, or ter-
minals pushed back in the connector. If intermediate connector
C-29 or joint connector C-01 is damaged, repair or replace it.
Refer to GROUP 00E, Harness Connector Inspection
Q: Is the wiring harness between combination meter
connector C-101 (terminal 1) and the battery in good
condition?
YES : Go to Step 8.
NO : Repair the wiring harness. Check to see that all
meters operate.
AC305231CT
CONNECTOR: C-101
HARNESS SIDE
AC305232
CONNECTORS: C-01, C-29, C-101
C-124
AY
C-01
HARNESS SIDE
C-101
C-29
C-29
C-01
IGNITION SWITCH
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CHASSIS ELECTRICAL
54A-35
STEP 8. Retest the system.
Q: Is the malfunction eliminated?
YES : The procedure is complete. (If no malfunctions are
found in all steps, an intermittent malfunction is
suspected. Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Point
).
NO : Replace the combination meter.
DATA LIST REFERENCE TABLE
M1543007300325
CHECK AT IMMOBILIZER-ECU
M1543007600508
Terminal Voltage Check
MUT-III
SCAN TOOL
DISPLAY
ITEM
NO.
INSPECTION ITEM
INSPECTION
REQUIREMENT
NORMAL
CONDITION
REGD.KEY
01
Key has been registered -
Number of registered ignition
keys
TP LOCK CHECK
02
Determining whether the
ignition key can be
registered or not
UNLOCK
Can be overwritten (Correct)
LOCK
Can not be overwritten
(Incorrect)
AC307447
TERMINAL NO.
SIGNAL
CHECKING
REQUIREMENT
TERMINAL VOLTAGE
1
Immobilizer-ECU power
supply
Ignition switch: "LOCK"
(OFF)
0V
Ignition switch: "ON"
Battery positive voltage
2
Immobilizer-ECU ground Always
0V
3
powertrain control
module
-
-
5
Immobilizer indicator
light
When immobilizer
indicator light is
illuminated
Approximately 5 volts
When immobilizer
indicator light is not
illuminated
0V
7
Ignition key ring antenna −
−
8
Ignition key ring antenna −
−
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