Mitsubishi L200. Manual — part 687
HEADLAMP
CHASSIS ELECTRICAL
54A-115
YES :
Go to Step 3.
NO :
Refer to inspection procedure C-1 "The
column switch (lighting and wiper switch)
signal is not received
STEP 3. Connector check: A-23X headlamp relay
(HI) connector
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Repair the defective connector.
STEP 4. Check the headlamp relay (HI).
Refer to
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Replace the headlamp relay (HI).
STEP 5. Voltage measurement at A-23X headlamp
relay (HI) connector.
(1) Remove the headlamp relay (HI), and measure at
the relay box side.
(2) Voltage between A-23X headlamp relay (HI)
connector terminal Nos.1, 4 and body earth
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Go to Step 6.
AC903878
AD
Connector: A-23X
Relay box side
AC903878
AD
Connector: A-23X
Relay box side
AC310507KY
Connector A-23X
(Relay box side)
HEADLAMP
CHASSIS ELECTRICAL
54A-116
STEP 6. Check the wiring harness between A-23X
headlamp relay (HI) connector terminal Nos.1, 4
and the fusible link (23).
• Check the power supply line from the fusible link
(23) for open circuit and short circuit.
Q: Is the check result normal?
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 :
Repair the wiring harness.
STEP 7. Connector check: C-218 ETACS-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 8.
NO :
Repair the defective connector.
AC903878
AD
Connector: A-23X
Relay box side
AC503086
AE
Battery
Front of vehicle
24
23
22
21
20
19
Fusible link (23)
AC509934
Connector: C-218 <LHD>
AJ
Junction
block
Junction block side
AC509943
Connector: C-218 <RHD>
AC
Junction block
(Rear view)
Junction block side
HEADLAMP
CHASSIS ELECTRICAL
54A-117
STEP 8. Check the wiring harness from A-23X
headlamp relay (HI) connector terminal No.2 to C-
218 ETACS-ECU connector terminal No.19.
NOTE: Prior to the wiring harness inspection, check
the junction block connector C-211 and repair if nec-
essary.
• Check the earth wires for open circuit.
Q: Is the check result normal?
YES :
Go to Step 9.
NO :
Repair the wiring harness.
STEP 9. Retest the system.
Check that the high-beam headlamps illuminate nor-
mally.
Q: Is the check result normal?
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 and register the
ID codes (Refer to
AC903878
AD
Connector: A-23X
Relay box side
AC509935
Connectors: C-211, C-218 <LHD>
AB
Junction block
Junction block side
C-218
Harness side
C-211
C-218
C-211
AC509943
Connector: C-218 <RHD>
AC
Junction block
(Rear view)
Junction block side
HEADLAMP
CHASSIS ELECTRICAL
54A-118
Inspection Procedure 3: The high-beam and low-beam headlamps do not illuminate when the passing
switch is operated.
CAUTION
Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.
COMMENTS ON TROUBLE SYMPTOM
If the low-beam and high-beam headlamps are nor-
mal, the passing switch input signal circuit or the
ETACS-ECU may be defective.
PROBABLE CAUSES
• Malfunction of the column switch
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III diagnosis code.
When the ignition switch is turned to the "LOCK"
(OFF) position, check that the ETACS-ECU does not
set the diagnosis code.
Q: Is the diagnosis code set?
YES :
Refer to diagnosis code chart
.
NO :
Go to Step 2.
STEP 2. Check that the headlamps operate.
Check that the low-beam and high-beam headlamps
work normally.
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Repair the headlamps. Refer to trouble
symptom chart
.
STEP 3. Retest the system.
When the passing switch is turned on, check if the
headlamps illuminate normally.
Q: Is the check result normal?
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 column switch.
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