Mitsubishi Evolution X. Manual — part 941
HEADLIGHT
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CHASSIS ELECTRICAL
54A-125
STEP 2. Lighting control sensor installation surface check
Visually check the presence of scratches or air bubbles <diam-
eter of 5 mm (0.2 inch) or more> on the windshield to which the
lighting control sensor is installed. In addition, visually check
that the optical coupler is not broken and that the lighting con-
trol sensor can be installed.
Q: Is the check result normal?
YES : Go to Step 3.
NO : Replace the windshield (Refer to GROUP 42A
−
Windshield
)
STEP 3. Using scan tool MB991958, Check whether the
diagnostic trouble code is reset.
Check again if the DTC is set to LIN.
(1) Wipe the windshield surface of the lighting control sensor
section thoroughly, and check that the surface is dry. Then,
perform the lighting control sensor (rain sensor) adaptation.
<Refer to GROUP 51
− Lighting Control Sensor (Rain
Sensor) Adaptation
>.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON"
position.
(3) Check if DTC is set.
Q: Is the DTC set?
YES : Replace the lighting control sensor.
NO : The trouble can be an intermittent malfunction (Refer
to GROUP 00
− How to use
Troubleshooting/Inspection Service Points
− How to
Cope with Intermittent Malfunction
DTC L0434: RLS Rain Sensor Error
DTC L0436: RLS Light Sensor Error
.
TROUBLE JUDGMENT
If a trouble occurs in the lighting control sensor, DTC
L0434 and L0436 are stored to LIN.
.
TECHNICAL DESCRIPTION (COMMENT)
Malfunction of the lighting control sensor
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)
HEADLIGHT
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CHASSIS ELECTRICAL
54A-126
Using scan tool MB991958, Check whether the diagnostic
trouble code is reset.
Check again if the DTC is set to LIN.
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
."
(2) Erase the DTC.
(3) Turn the ignition switch from "LOCK" (OFF) position to "ON"
position.
(4) Check if DTC is set.
Q: Is the DTC set?
YES : Replace the lighting control sensor.
NO : The trouble can be an intermittent malfunction (Refer
to GROUP 00
− How to use
Troubleshooting/Inspection Service Points
− How to
Cope with Intermittent Malfunction
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
HEADLIGHT
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CHASSIS ELECTRICAL
54A-127
TROUBLE SYMPTOM CHART
M1540102100302
Inspection
Procedure
No.
Trouble symptom
Reference
page
1
Headlight
and taillight
All the headlights (low-beam) do not illuminate..
2
All the headlights (high-beam) do not illuminate..
3
The headlights illuminate at low-beam (high-beam does not
illuminate) regardless of the lighting switch positions.
4
Headlights do not illuminate when the passing switch is operated.
5
One of the headlights does not illuminate.
6
High-beam indicator light does not illuminate normally.
7
The headlight automatic shutdown function does not work normally.
8
Daytime running light function
does not work normally.
Halogen type headlight
Discharge type headlight
9
Any of the tail lights, side marker lights or the license plate lights
does not Illuminate.
10
The auto light function does not work normally.
11
Turn-signal
light
All the turn-signal lights do not illuminate.
12
The comfort flashing function does not work normally.
13
The turn-signal indicator lights do not illuminate.
HEADLIGHT
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CHASSIS ELECTRICAL
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SYMPTOM PROCEDURES
Inspection Procedure 1: All the headlights (low-beam) do not illuminate.
CAUTION
Whenever the ECU is replaced, ensure that the power supply circuit, the ground circuit and the com-
munication circuit are normal.
Headlight Relay (Low-Beam) Circuit <Halogen Type>
ETACS-ECU
FUSIBLE
LINK
36
HEADLIGHT
RELAY (LOW)
FEED EFFECT
TRANSISTOR
RELAY BOX
ENGINE
COMPARTMENT
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