Mitsubishi L200. Manual - part 565

HEADLAMP WASHER

EXTERIOR

51-76

2. Wipe the surface of the windshield thoroughly, 

and check that the surface is dry.

3. Turn the ignition switch to the ON position.
4. Turn the ignition switch to the LOCK (OFF) 

position.

CAUTION

Before connecting or disconnecting M.U.T.-III, 
always turn the ignition switch to the LOCK 
(OFF) position.
5. Connect the M.U.T.-III to the diagnosis connector.
6. Turn the ignition switch to the ON position.
7. Wipe the windshield surface of the lighting control 

sensor section thoroughly, and check that the 
surface is dry.

8. Select "LIN" on the "System Select" screen, and 

press the "OK" button.

9. Select "Rain light sensor" on the "System Select" 

screen, and press the "OK" button.

10.Select "Special Function" on the "Rain light 

sensor" screen.

11.Select "Rain Sensor Adaptation" on the "Special 

Function" screen.

12.Press the "OK" button, and execute the "Rain 

Sensor Adaptation."

13.Press the "OK" button after the execution screen 

is displayed.

14.Press the "OK" button after "Completed" is 

displayed.

HEADLAMP WASHER

TROUBLESHOOTING

DIAGNOSIS TROUBLESHOOTING FLOW

M1511014600396

Refer to GROUP 00, How to Use Troubleshooting/
Inspection Service Points 

− Contents of Trouble-

shooting .

HEADLAMP WASHER

EXTERIOR

51-77

Inspection Procedure: The headlamp washer does not work.

CAUTION

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

AC903756

Headlamp Washer Motor Circuit

ETACS-ECU

RELAY
BOX

HEADLAMP
WASHER
RELAY

FUSIBLE
LINK

HEADLAMP
WASHER
MOTOR

23

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

AB

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

POSSIBLE CAUSES

• Malfunction of the headlamp washer motor

• Malfunction of the headlamp washer relay

• 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 GROUP 54A, Diagnosis Code 

Chart .

NO : 

Go to Step 2.

HEADLAMP WASHER

EXTERIOR

51-78

STEP 2. M.U.T.-III data list
Check the input signals below which are related to 
the headlamp washer.

• Ignition switch: ON

•

Item 
No.

Item name

Normal condition

30

Ignition switch (IG1)

ON

64

Head lamp washer 
output

ON

Headlamp washer switch: ON

OK: Normal conditions are displayed for all 
the items. 

Q: Is the check result normal?

All the signals are received normally. : 

Go to Step 

3.

The ignition switch (IG1) signal is not received. : 

Refer to GROUP 54A, Inspection Procedure 
C-3 "The ignition switch (IG1) signal is not 
received ."

The headlamp washer switch signal is not 
received. : 

Refer to GROUP 54A Inspection 

Procedure C-1 "The column switch (lighting 
and wiper switch) signal is not received ."

STEP 3. Connector check: A-137 headlamp 
washer motor connector

AC903898

Connector: A-137 <LHD>

Harness side

AB

A-137 (GR)

AC903900

Connector: A-137 <RHD>

Harness side

AB

A-137 (GR)

Q: Is the check result normal?

YES : 

Go to Step4.

NO : 

Repair the connector.

STEP 4. Check the headlamp washer motor 
assembly.
Refer to 

P.51-85

.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Replace the headlamp washer motor.

STEP 5. Resistance measurement at the A-137 
headlamp washer motor connector.

AC903898

Connector: A-137 <LHD>

Harness side

AB

A-137 (GR)

AC903900

Connector: A-137 <RHD>

Harness side

AB

A-137 (GR)

(1) Disconnect the connector, and measure at the 

wiring harness side.

AC310506 HR

Connector A-137
(Harness side)

(2) Continuity between A-137 headlamp washer 

motor connector terminal No.2 and body earth

OK: Continuity exists (2 

Ω or less)

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Go to Step 6.

HEADLAMP WASHER

EXTERIOR

51-79

STEP 6. Check the wiring harness between A-137 
headlamp washer motor connector terminal No.2 
and body earth.

AC903898

Connector: A-137 <LHD>

Harness side

AB

A-137 (GR)

AC903900

Connector: A-137 <RHD>

Harness side

AB

A-137 (GR)

• Check the earth wires for open 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: A-25X headlamp 
washer relay connector

AC903878

AC

Connector: A-25X

Relay box side

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Repair the connector.

STEP 8. Check the headlamp washer relay.
Refer to 

P.51-85

.

Q: Is the check result normal?

YES : 

Go to Step 9.

NO : 

Replace the headlamp washer relay.

STEP 9. Voltage measurement at the A-25X 
headlamp washer relay connector.

AC903878

AC

Connector: A-25X

Relay box side

(1) Remove the headlamp washer relay, and 

measure at the junction block side.

AC310507IU

Connector A-25X
(Junction block side)

(2) Check the voltage between the A-25X headlamp 

washer relay connector terminal No.2, 4 and 
body earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 11.

NO : 

Go to Step 10.