Mitsubishi Outlander XL. Manual - part 986

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

M15410900087USA0000010000

Turn-Signal Lights Circuit (LH)

ETACS-
ECU

REAR
COMBINATION
LIGHT
(LH)

SIDE TURN-
SIGNAL LIGHT
(LH)

HEADLIGHT
ASSEMBLY
(LH)

ZC6008720005

Connector: A-10, A-37

A-10 (B)

A-37 (B)

ZC6008780026

Connector: C-304, C-311

C-304

C-311

LIGHTING

54Ac-17

DIAGNOSIS

ZC6008800019

Connector: D-14

D-14

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
consecutively, the ETACS-ECU sets the DTC B16A3.

TROUBLESHOOTING HINTS

｠

The wiring harness or connectors may have loose,
corroded,  or  damaged  terminals,  or  terminals
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-37
<front>, side turn-signal light (LH) connector A-10 <side>,
rear combination light (LH) connector D-14 <rear> for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.

Q:Are headlight assembly (LH) connector A-37 <front>, side

turn-signal  light  (LH)  connector  A-10  <side>,  rear

combination  light  (LH)  connector  D-14  <rear>  in  good

condition?

YES:

 Go to Step 2.

NO:

 Repair the damaged parts.

STEP 2. Resistance measurement at headlight assembly
(LH) connector A-37 <front>, side turn-signal light (LH)
connector A-10 <side>, and rear combination light (LH)
connector D-14 <rear>.

(1)

Disconnect the connector, and measure at the wiring harness
side.

54Ac-18

LIGHTING

DIAGNOSIS

ZC5015310004

Connector A-37 
(Harness side)

ZC5015310003

Connector A-10 
(Harness side)

ZC5015310005

Connector D-14 
(Harness side)

(2)

Measure the resistance between the connector terminal of
light which does not illuminate and ground.

｠

Measure the resistance between the headlight assembly
(LH)  connector  A-37  (terminal  No.  8)  and  body  ground.
<Front>

｠

Measure the resistance between side turn-signal light (LH)
connector A-10 (terminal No. 1) and body ground. <Side>

｠

Measure  the  resistance  between  rear  combination  light
(LH)  connector  D-14  (terminal  No.  4)  and  body  ground.
<Rear>

The measured value should be 2 Ω or less.

Q:Does the measured resistance value correspond with this

range?

YES:

 Go to Step 4.

NO:

 Go to Step 3.

STEP 3. Check the wiring harness between headlight
assembly (LH) connector A-37 (terminal No. 8) <front>, side
turn-signal light (LH) connector A-10 (terminal No. 1)
<side>, rear combination light (LH) connector D-14
(terminal No. 4) <rear> and ground.

Q:Are the wiring harness between headlight assembly (LH)

connector A-37 (terminal No. 8) <front>, side turn-signal

light  (LH)  connector  A-10  (terminal  No.  1)  <side>,  rear

combination  light  (LH)  connector  D-14  (terminal  No.  4)

<rear> and ground in good condition?

YES:

 Go to Step 6.

NO:

 Repair the wiring harness.

STEP 4. Check ETACS-ECU connectors C-304 and C-310 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-310 <rear> in good condition?

LIGHTING

54Ac-19

DIAGNOSIS

YES:

 Go to Step 5.

NO:

 Repair the damaged parts.

STEP 5. Check the wiring harness between headlight
assembly (LH) connector A-37 (terminal No. 5) <front>, side
turn-signal light (LH) connector A-10 (terminal No. 2)
<side>, rear combination light (LH) connector D-14
(terminal No. 3) <rear> and ETACS-ECU connector C-304
(terminal No. 9) <front or side> or ETACS-ECU connector
C-311 (terminal No. 18) <rear>.

Q:Are the wiring harness between headlight assembly (LH)

connector A-37 (terminal No. 5) <front>, side turn-signal

light  (LH)  connector  A-10  (terminal  No.  2)  <side>,  rear

combination  light  (LH)  connector  D-14  (terminal  No.  3)

<rear> and ETACS-ECU connector C-304 (terminal No. 9)

<front or side> or ETACS-ECU connector C-311 (terminal

No. 18) <rear> in good condition?

YES:

 Go to Step 6.

NO:

 Repair the wiring harness.

STEP 6. Using scan tool MB991958, Check whether the
diagnostic trouble code is reset.

ZC501967

AC404789

ZC5019680000

MB991824

MB991827

MB991910

Data link

connector

To prevent damage to scan tool MB991958, always turn the
ignition  switch  to  the  "LOCK"  (OFF)  position  before
connecting or disconnecting scan tool MB991958.

(1)

Connect scan tool MB991958. Refer to "How to connect scan
tool P.54Ac-11."

(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

M15410900088USA0000010000

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
following conditions.

54Ac-20

LIGHTING

DIAGNOSIS