Mitsubishi L200. Manual - part 561

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

51-60

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

PROBABLE CAUSES

• Malfunction of the lighting control sensor

• 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: C-219 ETACS-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the damaged connector.

STEP 6. 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 7.

WINDSHIELD WIPER AND WASHER

EXTERIOR

51-61

STEP 7. 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.

INSPECTION PROCEDURE 8: Sometimes 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.

COMMENTS ON TROUBLE SYMPTOM
The lighting control sensor may be defective or a fail-
ure in the lighting control sensor (rain sensor) adap-
tation is suspected.

PROBABLE CAUSES

• Malfunction of the lighting control sensor

• Lighting control sensor (rain sensor) adaptation 

failure

DIAGNOSTIC 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 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. Lighting control sensor (rain sensor) 
installation surface check
Check that the lighting control sensor (rain sensor) is 
installed to the windshield glass correctly.

Q: Is the check result normal?

YES : 

Go to Step 6 after completion of the lighting 

control sensor (rain sensor) adaptation 
(

P.51-75

).

NO : 

Install the lighting control sensor (rain 
sensor) to the windshield glass correctly 
(Refer to GROUP 54A 

− Lighting control 

sensor removal and Installation).

STEP 6. Retest the system.
Check the lighting control sensor (rain sensor) after 
completion of the lighting control sensor (rain sensor) 
adaptation
(1)  Windshield glass surface should be dry.
(2)  Pour the windshield glass surface where the 

lighting control sensor is installed.

Q:  Does the windshield wiper operate?

WINDSHIELD WIPER AND WASHER

EXTERIOR

51-62

Operate once or more : 

Intermittent malfunction 

(Refer to GROUP 00 

− How to Use 

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

Does not operate : 

 Troubleshoot the rain-

sensitive wiper function (Refer to Inspection 
procedure 7 

P.51-56

).

Inspection Procedure 9: The Windshield Washer does not Work Normally.

CAUTION

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

Windshield Washer Motor Circuit 

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

IGNITION
SWITCH (ACC)

ETACS-ECU

WINDSHIELD 
WASHER

INPUT SIGNAL

WINDSHIELD
WASHER
RELAY

WASHER
MOTOR

J/B SIDE

COMMENTS ON TROUBLE SYMPTOM
The washer motor, the column switch or the ETACS-
ECU may be defective.

PROBABLE CAUSES

• Malfunction of the washer motor

• Malfunction of the column switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

WINDSHIELD WIPER AND WASHER

EXTERIOR

51-63

DIAGNOSIS PROCEDURE

STEP 1. Check the operation of the windshield 
wipers.
Check that the windshield wipers work normally.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Refer to Inspection Procedure 1 "The 
windshield wipers does not work at all 

P.51-

36

."

STEP 2. 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 GROUP 54A, Diagnosis Code 

Chart .

NO : 

Go to Step 3.

STEP 3. M.U.T.-III data list
Check the input signals below which are related to 
the windshield washer.

•

Item 
No.

Item name

Normal condition

67

Front washer output

ON

Turn the windshield washer switch to the "ON" 
position.

OK: Normal condition is displayed.

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Refer to GROUP 54A, Inspection Procedure 
C-1 "The Column Switch (lighting and wiper 
switch) signal is not received ."

STEP 4. Connector check: A-29 washer motor 
connector

AC903898

Connector: A-29 <LHD>

Harness side

AJ

A-29 (GR)

AC903900

Connector: A-29 <RHD>

Harness side

AJ

A-29 (GR)

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair the connector.

STEP 5. Check the washer motor assembly.
Refer to 

P.51-74

.

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Replace the washer motor.