Mitsubishi Evolution X. Manual — part 938

HEADLIGHT

TSB Revision

CHASSIS ELECTRICAL

54A-113

DTC B16A3: Turn-signal light (LH) short circuit

.

Turn-Signal Lights (LH) Circuit

ETACS-
ECU

REAR
COMBINATION
LIGHT
(TURN: LH)

SIDE TURN-
SIGNAL LIGHT
(LH)

HEADLIGHT
ASSEMBLY
(TURN: LH)

AC708949AG

Connectors: A-12, A-40

A-12 (B)

A-40 (B)

AC708972

Connectors: C-304, C-311

AW

C-311

C-304

AC708955AL

Connector: D-17

D-17 (BR)

AC708970AH

Connector: F-25

HEADLIGHT

TSB Revision

CHASSIS ELECTRICAL

54A-114

TROUBLE JUDGMENT

When the left wiring harness of turn-signal light is
short circuited, the ETACS-ECU sets DTC B16A3.

.

TECHNICAL DESCRIPTION (COMMENT)

When the short circuit is detected three times con-
secutively, the ETACS-ECU sets the DTC B16A3.

.

TROUBLESHOOTING HINTS

• The wiring harness or connectors may have

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

• Malfunction of the ETACS-ECU

DIAGNOSIS

Required Special Tools:

• MB992006: Extra fine probe

• MB991223: Harness set

• 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. Check headlight assembly (LH) connector A-40
<front>, side turn-signal light (LH) connector A-12 <side>,
rear combination light (LH) connector F-25 <rear> for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Are headlight assembly (LH) connector A-40 <front>,

side turn-signal light (LH) connector A-12 <side>, rear
combination light (LH) connector F-25 <rear> in good
condition?
YES : Go to Step 2.
NO : Repair or replace the damaged component(s). Refer

to GROUP 00E, Harness Connector Inspection

P.00E-2

.

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

C-311 <rear> in good condition?
YES : Go to Step 3.
NO : Replace the bulb(s) of the light that does not

illuminate.

HEADLIGHT

TSB Revision

CHASSIS ELECTRICAL

54A-115

STEP 3. Check the wiring harness between headlight
assembly (LH) connector A-40 (terminal 3) <front>, side
turn-signal light (LH) connector A-12 (terminal 2) <side>,
rear combination light (LH) connector F-25 (terminal 2)
<rear> and ETACS-ECU connector C-304 (terminal 9)
<front or side> or C-311 (terminal 18) <rear>.
NOTE: Also check intermediate connector D-17 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the
connector. If intermediate connector D-17 is damaged, repair or
replace the connector as described in GROUP 00E, Harness
Connector Inspection

P.00E-2

.

• Check the communication line for open circuit.

Q: Are the wiring harness between headlight assembly

(LH) connector A-40 (terminal 3) <front>, side
turn-signal light (LH) connector A-12 (terminal 2)
<side>, rear combination light (LH) connector F-25
(terminal 2) <rear> and ETACS-ECU connector C-304
(terminal 9) <front or side> or C-311 (terminal 18) <rear>
in good condition?
YES : Go to Step 4.
NO : The wiring harness may be damaged or the

connector(s) may have loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Repair the wiring harness as necessary. Verify that
the headlights illuminate normally.

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.

HEADLIGHT

TSB Revision

CHASSIS ELECTRICAL

54A-116

. (1) Connect scan tool MB991958. Refer to "How to connect

scan tool

P.54A-105

."

(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.

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

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

Turn-Signal Lights (RH) Circuit

ETACS-
ECU

REAR
COMBINATION
LIGHT
(TURN: RH)

HEADLIGHT
ASSEMBLY
(TURN: RH)

SIDE TURN-
SIGNAL LIGHT
(RH)