Mitsubishi L200. Manual - part 682

HEADLAMP

CHASSIS ELECTRICAL

54A-95

TROUBLESHOOTING

DIAGNOSIS TROUBLESHOOTING FLOW

M1540104200037

Refer to GROUP 00 

− Contents of troubleshooting .

DIAGNOSTIC FUNCTION

M1540104300045

HOW TO READ DIAGNOSIS CODE

Use the M.U.T.-III to read diagnosis code (Refer to 
GROUP 00 

− Diagnosis Function ).

HOW TO ERASE DIAGNOSIS CODE

Use the M.U.T.-III to erasing diagnosis code (Refer to 
GROUP 00 

− Diagnosis Function ).

DIAGNOSIS CODE CHART

M1540101400496

CAUTION

On troubleshooting, if the ignition switch is turned ON while disconnecting connector(s), diagnosis 
code(s) associated with other system may be set. On completion, confirm all systems for diagnosis 
code(s). If diagnosis code(s) are set, erase them all.
ETACS-ECU

LIN

MB992006

Extra fine probe

Continuity check and voltage 
measurement at harness wire or 
connector

Tool

Number

Name

Use

MB992006

Code No.

Diagnostic item

Reference page

B1707

Flasher timer

Detection of turn-signal lamp (open circuit)

P.54A-96

Code No.

Diagnostic item

Reference page

L0432

RLS RS adaptation error

P.54A-108

L0434

RLS rain sensor error

P.54A-108

L0436

RLS light sensor error

HEADLAMP

CHASSIS ELECTRICAL

54A-96

DIAGNOSIS CODE PROCEDURES

Code No.B1707: Detection of turn-signal lamp (open circuit)

COMMENTS ON TROUBLE SYMPTOM
When the turn-signal lamp bulb is blown, or connec-
tor(s) or wiring harness between the ETACS-ECU, 
the turn-signal lamp which does not illuminate and 
body earth is defective, the ETACS-ECU set diagno-
sis code No.B1707.

PROBABLE CAUSES

• Malfunction of the turn-signal lamp bulb

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

(TURN:RH)

(TURN:LH)

(RH)

(LH)

(RH)

(LH)

Turn-Signal Lamp Circuit

J/B SIDE

ETACS-ECU

SIDE TURN-
SIGNAL LAMP

FRONT TURN-
SIGNAL LAMP

REAR COMBINATION 
LAMP

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

NOTE

: VEHICLES WITH REAR BODY
: VEHICLES WITHOUT REAR BODY
: LHD
: RHD

HEADLAMP

CHASSIS ELECTRICAL

54A-97

DIAGNOSIS PROCEDURE

STEP 1. Confirm which turn-signal lamp is 
defective.

Q: Which turn-signal lamp fails to illuminate 

correctly?
Front turn-signal lamp : 

Go to Step 2.

Side turn-signal lamp : 

Go to Step 9.

Rear turn-signal lamp : 

Go to Step 16.

STEP 2. Connector check: A-118 front turn-signal 
lamp (LH) connector or A-127 front turn-signal 
lamp (RH) connector.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair the defective connector. Go to Step 
23.

STEP 3. Check the bulb(s) of the front turn-signal 
lamps.
Check the bulb(s) of the defective lamp.

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Replace the bulb(s) of the defective lamp. 
Go to Step 23.

STEP 4. Resistance measurement at the A-118 
front turn-signal lamp (LH) connector or A-127 
front turn-signal lamp (RH) connector.

(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Resistance measurement between the defective 

lamp connector terminal and body earth.

• Resistance between A-118 front turn-signal 

lamp (LH) connector terminal No.1 and body 
earth

• Resistance between A-127 front turn-signal 

lamp (RH) connector terminal No.1 and body 
earth

OK: Continuity exists (2 

Ω or less)

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Go to Step 5.

AC903898

AD

Harness side

Connector: A-118

A-118 (BR)

AC903897

AC

Connector: A-127

Harness side

A-127 (BR)

AC903898

AD

Harness side

Connector: A-118

A-118 (BR)

AC903897

AC

Connector: A-127

Harness side

A-127 (BR)

AC310506

Connectors A-118, A-127 

HW

(Harness side)

HEADLAMP

CHASSIS ELECTRICAL

54A-98

STEP 5. Check the wiring harness from A-118 
front turn-signal lamp (LH) connector terminal 
No.1 or A-127 front turn-signal lamp (RH) 
connector terminal No.1 to body earth.

• 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 ). Go to Step 23.

NO : 

Repair the wiring harness. Go to Step 23.

STEP 6. Connector check: C-218 ETACS-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Repair the defective connector. Go to Step 
23.

AC903898

AD

Harness side

Connector: A-118

A-118 (BR)

AC903897

AC

Connector: A-127

Harness side

A-127 (BR)

AC509934

Connector: C-218 <LHD>

AJ

Junction 

block

Junction block side

AC509943

Connector: C-218 <RHD>

AC

Junction block

 (Rear view)

Junction block side