Mitsubishi Evolution X. Manual — part 962
REAR COMBINATION LIGHT
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CHASSIS ELECTRICAL
54A-209
STEP 7. Using scan tool MB991958, Check whether the
diagnostic trouble code is reset.
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) Connect scan tool MB991958. Refer to "How to connect
scan tool (M.U.T.-III)
(2) Turn the ignition switch to the "ON" position.
(3) Erase the DTC.
(4) Turn the ignition switch from "LOCK" (OFF) position to "ON"
position.
(5) Check if DTC is set.
Q: Is the DTC set?
YES : Replace the ETACS-ECU.
NO : The procedure is complete.
TROUBLE SYMPTOM CHART
M1541401000243
SYMPTOM PROCEDURES
Inspection Procedure 1: All the taillights do not illuminate.
CAUTION
Before replacing the ECU, ensure that the power
supply circuit, the ground circuit and the com-
munication circuit are normal.
.
TECHNICAL DESCRIPTION (COMMENT)
If all the taillights do not illuminate normally, the tail-
light switch input circuit or ETACS-ECU may have a
problem.
.
TROUBLESHOOTING HINTS
• Malfunction of column switch
• 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
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
Inspection
Procedure No.
Trouble symptom
Reference page
1
All the taillights do not illuminate.
2
One of the headlights does not illuminate.
REAR COMBINATION LIGHT
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CHASSIS ELECTRICAL
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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. License plate light operation check
Check that the license plate light illuminates normally.
Q: Does license plate light work normally?
YES : Go to Step 2.
NO : Replace the ETACS-ECU.
STEP 2. Using scan tool MB991958, read the diagnostic
trouble code.
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) Connect scan tool MB991958. Refer to "How to connect
scan tool (M.U.T.-III)
(2) Turn the ignition switch to the "ON" position.
(3) Check whether the ETACS-ECU related DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?
YES : Diagnose the ETACS-ECU. Refer to ETACS,
.
NO : Go to Step 3.
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
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CHASSIS ELECTRICAL
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STEP 3. Using scan tool MB991958, check data list.
Use the ETACS-ECU data list to check the signals related to
the taillight illumination.
• Turn the ignition switch to the "ACC" position.
• Turn the taillight switch to the "ON" position.
Q: Does scan tool MB991958 display the items "Taillight"
as normal condition?
YES : Go to Step 4.
NO : Troubleshoot the ETACS-ECU (Refer to
).
STEP 4. Retest the system
Check that the taillight illuminates normally.
Q: Does the taillight work normally?
YES : The trouble can be an intermittent malfunction (Refer
to GROUP 00, How to use
Troubleshooting/inspection Service Points, How to
Cope with Intermittent Malfunction
NO : Replace the ETACS-ECU.
Item No.
Item name
Normal
conditions
Item 218
Taillight
ON
REAR COMBINATION LIGHT
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CHASSIS ELECTRICAL
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Inspection Procedure 2: One of the headlights does not illuminate.
.
Taillight Circuit
REAR
COMBINATION
LIGHT
(LH) (RH)
ETACS-ECU
JOINT
CONNECTOR
TAILLIGHT CONTROL CIRCUIT
AC608145
BT
Connector: C-38
AC608152 AK
Connector: C-311
Junction block
AC608166
AM
Connector: D-11
AC608171AP
Connectors: F-06, F-20
F-06
F-20
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