Mitsubishi Outlander GS45X. Manual — part 45
HEADLIGHT
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CHASSIS ELECTRICAL
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.
TECHNICAL DESCRIPTION (COMMENT)
If the daytime running light function does not work,
connector(s), wiring harness in the CAN bus lines,
the engine control module, the combination meter,
the headlight relay (LOW), the ETACS-ECU or the
input signal circuit may be defective.
.
TROUBLESHOOTING HINTS
• Trouble in input signal system
• Malfunction of headlight relay (LOW)
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB992006: Extra Fine Probe
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: M.U.T.-III USB Cable
• MB991910: M.U.T.-III Main Harness A
STEP 1. Verify the headlight (low-beam) operation.
Check to see that the headlight (low-beam) lights up properly
when operating the dimmer switch while the headlight switch is
ON.
Q: Do the headlights (low-beam) illuminate normally?
YES : Go to Step 2.
NO : Refer to Inspection Procedure 1 "None of headlights
(low-beam) illuminates
AC709504
AB
Connector: A-28X <2.4L Engine>
AC702950 AJ
Connector: A-28X <3.0L Engine>
AC901112
A-56 (B)
Connectors: A-37, A-56
AR
A-37 (B)
ACA02655AW
Connector: C-312
HEADLIGHT
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STEP 2. Using scan tool MB991958, diagnose the CAN bus
line.
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 too (M.U.T.-III)
."
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the CAN bus line found to be normal?
YES : Go to Step 3.
NO : Repair the CAN bus line (Refer to GROUP 54C,
).
STEP 3. Using scan tool MB991958, read the ETACS-ECU
diagnostic trouble code.
Check whether ETACS-ECU DTCs are set.
(1) Turn the ignition switch to the "ON" position.
(2) Check for ETACS-ECU DTCs.
(3) 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 4.
STEP 4. Using scan tool MB991958, read the MFI system
diagnostic trouble code.
Check whether engine control module DTCs are set or not.
(1) Turn the ignition switch to the "ON" position.
(2) Check for engine control module DTCs.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?
YES : Diagnose the MFI system. Refer to GROUP 13A,
. <2.4 L Engine>, GROUP 13B,
. <3.0 L Engine>
NO : Go to Step 5.
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
HEADLIGHT
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STEP 5. Check the parking brake switch.
Check the input signals from the parking brake switch.
(1) Turn the ignition switch to the "ON" position.
(2) Check that the brake warning light on the combination
meter goes off when the parking brake lever is released.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Does the brake warning light go off?
YES : Go to Step 6.
NO : Refer to GROUP 36, Diagnosis, Inspection Procedure
. Verify that the daytime running light function
does not work normally.
STEP 6. Temporarily replace the headlight relay (LOW),
and retest the system.
After temporarily replacing the headlight relay (LOW), with the
ignition switch being in the ON position (engine is running),
release the parking brake (parking brake switch: OFF) and turn
the lighting switch to the OFF or TAIL position, and then check
if the headlights (low-beam) illuminate with a reduced beam
state.
Q: Do the headlights (low-beam) illuminate in good
condition?
YES : Replace the headlight relay (LOW).
NO : Replace the ETACS-ECU.
HEADLIGHT
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Inspection Procedure 8: Daytime running light function does not work normally. <Discharge type
headlight>
CAUTION
Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.
Daytime Running Light Circuit
FUSIBLE
LINK
36
DAYTIME
RUNNING
LIGHT RELAY
HEADLIGHT
ASSEMBLY
(DRL:LH) (DRL:RH)
RELAY BOX
ENGINE
COMPARTMENT
ETACS-ECU
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