Mitsubishi Outlander GS45X. Manual - part 35

HEADLIGHT

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CHASSIS ELECTRICAL

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STEP 2. Check ETACS-ECU connectors C-304, C-311 and 
C-317 <door mirror type> for loose, corroded or damaged 
terminals, or terminals pushed back in the connector.
Q: Are ETACS-ECU connectors C-304, C-311 and C-317 

<door mirror type> in good condition?
YES : Go to Step 3.
NO :  Repair the damaged parts.

STEP 3. Check the wiring harness between headlight 
assembly (LH) connector A-37 (terminal No. 3), side 
turn-signal light (LH) connector A-10 (terminal No. 2) 
<fender>, door mirror assembly (LH) connector E-29 
(terminal No. 2) <door mirror type>, rear combination light 
(LH) connector D-14 (terminal No. 3) and ETACS-ECU 
connector C-304 (terminal No. 9), ETACS-ECU connector 
C-311 (terminal No. 18) or ETACS-ECU connector C-317 
(terminal No. 4).
Check the communication line for short circuit.
NOTE: Also check intermediate connector C-127 <door mirror 
type> for loose, corroded, or damaged terminals, or terminals 
pushed back in the connector. If intermediate connector C-127 
<door mirror type> is damaged, repair or replace the connector 
as described in GROUP 00E, Harness Connector Inspection 

P.00E-2

.

Q: Are the wiring harness between headlight assembly 

(LH) connector A-37 (terminal No. 3), side turn-signal 
light (LH) connector A-10 (terminal No. 2) <fender>, door 
mirror assembly (LH) connector E-29 (terminal No. 2) 
<door mirror type>, rear combination light (LH) 
connector D-14 (terminal No. 3) and ETACS-ECU 
connector C-304 (terminal No. 9), ETACS-ECU 
connector C-311 (terminal No. 18) or ETACS-ECU 
connector C-317 (terminal No. 4) in good condition?
YES : Go to Step 4.
NO :  Repair the wiring harness.

HEADLIGHT

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STEP 4. Using scan tool MB991958, Check whether the 
diagnostic trouble code is reset.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect 

scan tool 

P.54A-123

."

(2) Turn the ignition switch to the "ON" position.
(3) Erase the DTC.
(4) Turn the ignition switch from "LOCK" (OFF) position to "ON" 

position.

(5) Check if DTC is set.
Q: Is the DTC set?

YES : Replace the ETACS-ECU.
NO :  The procedure is complete.

ZC501967

AC404789

AC702802

MB991824

MB991827

MB991910

Data link

connector

AB

HEADLIGHT

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DTC B16A4: Blown turn-signal light (RH) bulb

Turn-Signal Light Circuit (RH)

ETACS-
ECU

REAR
COMBINATION
LIGHT
(TURN: RH)

HEADLIGHT
ASSEMBLY
(TURN: RH)

SIDE TURN-
SIGNAL LIGHT
(RH)

DOOR
MIRROR
ASSEMBLY
(RH)

<FENDER TYPE>

<DOOR MIRROR TYPE>

AC901112

Connectors: A-56, A-60

A-56 (B)

AQ

A-60 (B)

AC901076AI

Connectors: C-112, C-113

C-113 (BR)

C-112

HEADLIGHT

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.

DIAGNOSTIC FUNCTION

When the right bulb of turn-signal light is blown, the 
ETACS-ECU sets DTC B16A4.

.

TECHNICAL DESCRIPTION (COMMENT)

The ETACS-ECU sets DTC B16A4 under the follow-
ing conditions.

• If there is a malfunction to the right turn-signal 

light bulb, the blown right bulb counter counts 
once when the illumination of hazard or turn-sig-
nal light (right side) is attempted.

• If the blown right bulb counter reaches "3," the 

DTC B16A4 is set.

.

TROUBLESHOOTING HINTS

• Malfunction of turn-signal light bulb (right side)

• Malfunction of the ETACS-ECU

• The wiring harness or connectors may have 

loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector

DIAGNOSIS

Required Special Tools:

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: M.U.T.-III USB Cable

• MB991910: M.U.T.-III Main Harness A (Vehicles with 

CAN communication system)

STEP 1. Bulb check.
Check whether the bulb of turn-signal light which does not illu-
minate is normal.
Q: Is the check result normal?

YES : Go to Step 2.
NO :  Replace the bulb of turn-signal light which does not 

illuminate.

ACA02655AV

Connectors: C-304, C-311, C-317

C-304

C-311

C-317

AC702817AE

Connector: D-09

AC703415AF

Connector: E-28