Mitsubishi Evolution X. Manual — part 970
DOME LIGHT
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CHASSIS ELECTRICAL
54A-241
DIAGNOSIS
STANDARD FLOW OF DIAGNOSTIC
TROUBLESHOOTING
M1541301500081
Refer to GROUP 00, How to use Troubleshooting/inspection
Service Points, Troubleshooting Contents
DIAGNOSTIC FUNCTION
M1541302100020
HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)
.
Required Special Tools:
MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827: M.U.T.-III USB Cable
• MB991910: M.U.T.-III Main Harness A (Vehicles with CAN
communication system)
.
MB991223
a. MB991219
b. MB991220
c. MB991221
d. MB991222
Harness set
a. Check harness
b. LED harness
c. LED harness
adapter
d. Probe
General service
tool (jumper)
Continuity check and voltage
measurement at harness wire or
connector
a. For checking connector pin
contact pressure
b. For checking power supply
circuit
c. For checking power supply
circuit
d. For connecting a locally sourced
tester
MB992006
Extra fine probe
−
Continuity check and voltage
measurement at harness wire or
connector
Tool
Tool number and
name
Supersession
Application
MB991223
a
d
c
b
DO NOT USE
BA
MB992006
DOME LIGHT
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CHASSIS ELECTRICAL
54A-242
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
1. Ensure that the ignition switch is at the "LOCK" (OFF)
position.
2. Start up the personal computer.
3. Connect special tool MB991827 to special tool MB991824
and the personal computer.
4. Connect special tool MB991910 to special tool MB991824.
5. Connect special tool MB991910 to the data link connector.
6. Turn the power switch of special tool MB991824 to the "ON"
position.
NOTE: When special tool MB991824 is energized, special
tool MB991824 indicator light will be illuminated in a green
color.
7. Start the M.U.T.-III system on the personal computer.
NOTE: Disconnecting scan tool MB991958 is the reverse of the
connecting sequence, making sure that the ignition switch is at
the "LOCK" (OFF) position.
HOW TO READ AND ERASE DIAGNOSTIC
TROUBLE CODES
.
Required Special Tools:
MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827: M.U.T.-III USB Cable
• MB991910: M.U.T.-III Main Harness A (Vehicles with CAN
communication system)
.
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
NOTE: If the battery voltage is low, diagnostic trouble codes will
not be set. Check the battery if scan tool MB991958 does not
display.
1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Select "System select" from the start-up screen.
4. Select "From 2006 MY" of "Model Year." When the "Vehicle
Information" is displayed, check the contents.
5. Select "ETACS" from "System List", and press the "OK"
button.
NOTE: When the "Loading Option Setup" list is displayed,
check the applicable item.
6. Select "Diagnostic Trouble Code."
7. If a DTC is set, it is shown.
8. Choose "Erase DTCs" to erase the DTC.
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
DOME LIGHT
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CHASSIS ELECTRICAL
54A-243
TROUBLE SYMPTOM CHART
M1541300200139
SYMPTOM PROCEDURES
Inspection Procedure 1: The front dome light does not illuminate normally.
CAUTION
Whenever the ECU is replaced, ensure that the power supply circuit, the ground circuit and the com-
munication circuit are normal.
Inspection
Procedure No.
Trouble symptom
Reference page
1
The front dome light does not illuminate normally.
2
The rear dome light does not illuminate normally.
3
The luggage compartment light does not illuminate normally.
4
The interior light auto-cut function does not operate correctly.
Front Dome Light Circuit
ETACS-ECU
FRONT
DOME
LIGHT
DOME LIGHT
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CHASSIS ELECTRICAL
54A-244
.
TROUBLE JUDGMENT
The ETACS-ECU illuminates and extinguishes the
front room light in accordance with the input signals
below.
• Ignition switch (IG1)
• Key reminder switch
• Door switches
• Front door lock actuator
.
TECHNICAL DESCRIPTION (COMMENT)
If this does not work normally, the above switch input
circuit(s), front dome light, or ETACS-ECU may have
a problem.
.
TROUBLESHOOTING HINTS
• Malfunction of the key reminder switch
• Malfunction of door switch
• Malfunction of the front door lock actuator switch
• Malfunction of front dome light
• Malfunction of the ETACS-ECU
• The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector
DIAGNOSIS
Required Special Tools:
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827: M.U.T.-III USB Cable
• MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN communication system)
STEP 1. Rear dome light operation check.
Check that the rear dome light illuminates and extinguishes
normally.
Q: Does rear dome light work normally?
YES : Go to Step 2.
NO : Replace the ETACS-ECU.
AC708972AI
Connector: C-316
Junction block
AC708954 AX
Connector: D-03
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