Mitsubishi L200. Manual — part 560

WINDSHIELD WIPER AND WASHER

EXTERIOR

51-56

Inspection Procedure 6: The rain sensitive AUTO wiper function does not work at all <Vehicles with
lighting control sensor>.

CAUTION

Whenever ECU is replaced, ensure that the input and output signal circuits are normal.

AC903790

Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Grey R : Red P : Pink V : Violet PU : Purple SI : Silver

LIGHTING CONTROL
SENSOR

ETACS-ECU

LIN
INTERFACE

20

Raindrops Sensing Wiper Function Control Circuit

FUSIBLE LINK

AB

AC509934

Connector: C-219 <LHD>

CU

C-219 (GR)

Harness side

Junction block (Front view)

AC509943

Connector: C-219 <RHD>

AB

C-219 (GR)

Harness side

Junction block
(Rear view)

AC903877AB

Connector: D-38 <LHD>

Harness side

AC903879AB

Connector: D-38 <RHD>

Harness side

WINDSHIELD WIPER AND WASHER

EXTERIOR

51-57

OPERATION
The raindrops sensitive wiper function automatically
adjusts the wiping speed of windscreen wiper by
detecting the rainfall through lighting control sensor
when the ignition switch is in the ON position and the
column switch is in the AUTO position.

COMMENTS ON TROUBLE SYMPTOM
The windshield wiper motor, the column switch, the
lighting control sensor, the harness connector, or the
ETACS-ECU may be defective.

PROBABLE CAUSES

• Defective column switch (column-ECU)

• Malfunction of the lighting control sensor

• Defective windshield wiper motor

• Malfunction of ETACS-ECU

• Damaged wiring harness and connectors

DIAGNOSIS PROCEDURE

STEP 1. Lighting control sensor installation
surface check
Visually check the presence of scratches or air bub-
bles (diameter of 5 mm or more) on the windshield to
which the lighting control sensor is installed.

Q: Is the check result normal?

YES :

Go to Step 2.

NO :

Replace the windshield (Refer to GROUP
42

− Windshield Removal and Installation ).

STEP 2. Windshield wiper operation check
Check that the windshield wipers work normally.

Q: Is the check result normal?

YES :

Go to Step 3.

NO :

Refer to trouble symptom chart

P.51-93

.

STEP 3. M.U.T.-III diagnosis code
Check if an ETACS-related diagnosis code is set.

Q: Is the diagnosis code set?

YES :

Diagnose the ETACS-ECU. Refer to

GROUP 54A

− ETACS .

NO :

Go to Step 4.

STEP 4. M.U.T.-III diagnosis code
Check if a lighting control sensor-related diagnosis
code is set.

Q: Is the diagnosis code set?

YES :

Diagnose the lighting control sensor. (Refer

to GROUP 54A

− Diagnosis Code Chart .)

NO :

Go to Step 5.

STEP 5. Connector check: D-38 Lighting control
sensor connector

Q: Is the check result normal?

YES :

Go to Step 6.

NO :

Repair the damaged connector.

WINDSHIELD WIPER AND WASHER

EXTERIOR

51-58

STEP 6. Resistance measurement at the D-38
lighting control sensor connector
(1) Disconnect the connector, and measure the

resistance at the wiring harness.

(2) Measure the resistance between D-38 lighting

control sensor connector terminal No.2 and body
earth.

OK: Continuity exists (2

Ω or less)

Q: Is the check result normal?

YES :

Go to Step 8.

NO :

Go to Step 7.

STEP 7. Check the wiring harness between D-38
lighting control sensor connector terminal No.2
and body earth.

• Check the earth wires for open circuit.

Q: Is the check result normal?

YES :

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 8. Voltage measurement at the D-38
lighting control sensor connector
(1) Disconnect the connector, and measure the

voltage at the wiring harness side.

(2) Measure the voltage between D-38 lighting

control sensor connector terminal No.1 and body
earth.

OK: System voltage

Q: Is the check result normal?

YES :

Go to Step 10.

NO :

Go to Step 9.

STEP 9. Check the wiring harness between D-38
lighting control sensor connector terminal No.1
and fusible link (20).
NOTE: Prior to the wiring harness inspection, check
the ETACS-ECU connectors C-213, C-206 and
repair if necessary.

• Check the power supply line for open circuit.

Q: Is the check result normal?

YES :

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 10. Connector check: C-219 ETACS-ECU
connector

Q: Is the check result normal?

YES :

Go to Step 11.

NO :

Repair the damaged connector.

STEP 11. Measure the voltage at the C-219
ETACS-ECU connector.
(1) Disconnect the connector, and measure the

voltage at the wiring harness side.

(2) Measure the voltage between C-219 ETACS-

ECU connector terminal No. 1 and body earth.

OK: System voltage

Q: Is the check result normal?

YES :

Replace the Lighting control sensor.

NO :

Go to Step 12.

STEP 12. Check the wiring harness between C-
219 ETACS-ECU connector terminal No.54 and D-
38 lighting control sensor connector terminal
No.3.
NOTE: Prior to the wiring harness inspection, check
the intermediate connector C-117, C-138 and repair
if necessary.

• Check the input and output lines for open or short

circuit.

Q: Is the check result normal?

YES :

Intermittent malfunction (Refer to GROUP

00

− How to Use Troubleshooting/

Inspection Service Points - How to Cope
with Intermittent Malfunction .)

NO :

Repair the wiring harness.

WINDSHIELD WIPER AND WASHER

EXTERIOR

51-59

INSPECTION PROCEDURE 7: The rain sensitive AUTO wiper function works even though there is no
rainfall <Vehicles with lighting control sensor>.

CAUTION

Whenever ECU is replaced, ensure that the input and output signal circuits are normal.

AC903790

Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Grey R : Red P : Pink V : Violet PU : Purple SI : Silver

LIGHTING CONTROL
SENSOR

ETACS-ECU

LIN
INTERFACE

20

Raindrops Sensing Wiper Function Control Circuit

FUSIBLE LINK

AB