Mitsubishi L200. Manual — part 555

WINDSHIELD WIPER AND WASHER

EXTERIOR

51-36

Inspection Procedure 1: The windshield wipers do not work at all.

CAUTION

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

AC903741

Windshield Wiper Power Supply Circuit

IGNITION
SWITCH (ACC)

WIPER SPEED
SWITCHING
RELAY

WINDSHIELD
WIPER
MOTOR

CIRCUIT
BREAKER

ETACS-ECU

J/B SIDE

AB

COLUMN
SWITCH

COLUMN-ECU

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

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

PROBABLE CAUSES

• Malfunction of the windshield wiper motor

• 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, ETACS Diagnosis

Code Chart .

NO :

Go to Step 2.

WINDSHIELD WIPER AND WASHER

EXTERIOR

51-37

STEP 2. Check the power supply circuit.
When the ignition switch is turned to the LOCK
(OFF) position, check if the hazard warning lamps
illuminate.

Q: Is the check result normal?

YES :

Go to Step 3.

NO :

Refer to GROUP 54A,ETACS Inspection
Procedure A-1 "Check The Battery Power
Supply Circuit to The ETACS-ECU ."

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

•

Item
No.

Item name

Normal condition

29

Ignition switch(ACC) ON

Turn the ignition switch to the "ACC" position.

OK: Normal condition is displayed.

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Refer to GROUP 54A, ETACS Inspection
Procedure C-2 "The Ignition Switch (ACC)
signal is not received ."

STEP 4. Connector check: A-05 windshield wiper
motor connector

AC903897

AJ

Connector: A-05 <LHD>

Harness side

A-05 (GR)

AC903889

AC

Connector: A-05 <RHD>

Harness side

A-05 (GR)

Q: Is the check result normal?

YES :

Go to Step 5.

NO :

Repair the connector.

STEP 5. Check the windshield wiper motor
assembly.
Refer to

P.51-71

.

Q: Is the check result normal?

YES :

Go to Step 6.

NO :

Replace the windshield wiper motor
assembly.

STEP 6. Resistance measurement at the A-05
windshield wiper motor connector.

AC903897

AJ

Connector: A-05 <LHD>

Harness side

A-05 (GR)

AC903889

AC

Connector: A-05 <RHD>

Harness side

A-05 (GR)

(1) Disconnect the connector, and measure at the

wiring harness side.

AC310506

Connector A-05

FX

(Harness side)

(2) Continuity between A-05 windshield wiper 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 8.

NO :

Go to Step 7.

WINDSHIELD WIPER AND WASHER

EXTERIOR

51-38

STEP 7. Check the wiring harness between A-05
windshield wiper motor connector terminal No.2
and body earth.

AC903897

AJ

Connector: A-05 <LHD>

Harness side

A-05 (GR)

AC903889

AC

Connector: A-05 <RHD>

Harness side

A-05 (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 and go to Step 8.

STEP 8. Connector check: C-218 ETACS-ECU
connector

AC509934

Connector: C-218 <LHD>

AJ

Junction

block

Junction block side

AC509943

Connector: C-218 <RHD>

AC

Junction block

(Rear view)

Junction block side

Q: Is the check result normal?

YES :

Go to Step 9.

NO :

Repair the defective connector.

WINDSHIELD WIPER AND WASHER

EXTERIOR

51-39

STEP 9. Check the wiring harness between C-218
ETACS-ECU connector terminal Nos. 8,7 and A-
05 windshield wiper motor connector terminal
Nos. 3,5 <LHD> or 1,4 <RHD>.

AC509934

Connector: C-218 <LHD>

AJ

Junction

block

Junction block side

AC509943

Connector: C-218 <RHD>

AC

Junction block

(Rear view)

Junction block side

AC903897

AJ

Connector: A-05 <LHD>

Harness side

A-05 (GR)

AC903889

AC

Connector: A-05 <RHD>

Harness side

A-05 (GR)

NOTE:

AC509934

Connector: C-210 <LHD>

Junction block

AN

Harness side

AC509936

Connector: C-210 <RHD>

Harness side

AJ

Junction block

(Front view)

Prior to the wiring harness inspection, check the
junction block connector C-210 and repair if neces-
sary.

• Check the output lines for open circuit.

Q: Is the check result normal?

YES :

Go to Step 10.

NO :

Repair the wiring harness.