Mitsubishi Outlander (2013+). Manual - part 651

HEADLAMP

CHASSIS ELECTRICAL

54A-89

NOTE: 

.

•

The numbers indicate the sequence in which the 
component is checked.

•

For the troubleshooting of other than the above, 
refer to Trouble Symptom Chart 

P.54A-96

.

•

If ETACS-ECU fails, only the low-beam head-
lamps will illuminate as a fail-safe measure.

TROUBLESHOOTING

STANDARD FLOW OF DIAGNOSTIC 
TROUBLESHOOTING

M1540104200167

Refer to GROUP 00 

− Contents of troubleshooting .

DIAGNOSIS FUNCTION

M1540104300335

HOW TO READ DIAGNOSIS CODE

Refer to GROUP 00 

− Diagnosis function .

HOW TO ERASE DIAGNOSIS CODE

Refer to GROUP 00 

− Diagnosis function .

DIAGNOSIS CODE CHART

M1540101400764

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

Diagnosis code No.

Diagnostic item

Reference page

B16A2

Turn-signal (LH) bulb outage

B16A3

Turn-signal (LH) circuit short

B16A4

Turn-signal (RH) bulb outage

B16A5

Turn-signal (RH) circuit short

B16A6

Turn-signal fuse blown

LIN <VEHICLES WITH LIGHTING CONTROL SENSOR>

Diagnosis code No.

Diagnostic item

Reference page

L0432

RLS* RS adaptation error

L0434

RLS* Light sensor error

L0436

RLS* Rain sensor error

NOTE: *: Rain light sensor (Lighting control sensor)

Wiring harness and 
connector

2

1

−

Column switch

3

−

−

Bulb

4

2

1

Headlamp control unit

5

3

2

ETACS-ECU

6

4

−

Item to be checked

Trouble symptom

The headlamps do not 
illuminate.

The headlamps flicker.

The headlamps are dim.

HEADLAMP

CHASSIS ELECTRICAL

54A-90

DIAGNOSIS CODE PROCEDURES

Code No.B16A2 Turn-signal (LH) bulb outage

CAUTION

• Before replacing the ECU, ensure that the 

power supply circuit, the earth circuit and the 
communication circuit are normal.

• When the ETACS-ECU of vehicles without 

KOS is replaced, the encrypted code of the 
ignition key needs to be registered to the 
ETACS-ECU. (If the encrypted code is not reg-
istered, the engine cannot be started. Regis-
ter the encrypted code as described in 
Immobilizer System 

− How to Register Key ID 

P.54A-33

.)

DIAGNOSTIC FUNCTION

When the left bulb of turn-signal lamp is blown, the 
ETACS-ECU sets diagnosis code No. B16A2.

JUDGEMENT CRITERIA

The ETACS-ECU sets diagnosis code No. B16A2 
under the following conditions.

i. With the diagnosis code not set, if there is a mal-

function to the left turn-signal lamp bulb, the 
blown left bulb counter counts once when the illu-
mination of hazard or turn-signal lamp (left side) 
is attempted.

ii. If the blown left bulb counter reaches "3," diagno-

sis code No. B16A2 is set.

PROBABLE CAUSES

• Malfunction of turn-signal lamp bulb (left side)

• Malfunction of turn-signal lamp assembly (left 

side) <Integrated in door mirror type>

• Damaged harness wires and connectors

• Malfunction of the ETACS-ECU

DIAGNOSIS PROCEDURE

STEP 1. Bulb check
Check whether the bulb of turn-signal lamp which 
does not illuminate is normal.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Replace the bulb of turn-signal lamp which 
does not illuminate.

STEP 2. Resistance measurement at the 
headlamp assembly (TURN: LH) connector, side 
turn-signal lamp (LH) connector and rear 
combination lamp (TURN: LH) connector
(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Measure the resistance between the connector 

terminal of lamp which does not illuminate and 
the body earth.

• Measure the resistance between the head-

lamp assembly (TURN: LH) connector (earth 
terminal) and the body earth.

• Measure the resistance between the side 

turn-signal lamp (LH) connector (earth termi-
nal) and the body earth.

• Measure the resistance between the rear 

combination lamp (TURN: LH) connector 
(earth terminal) and the body earth.

OK: Continuity exists (2 

Ω or less)

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Go to Step 3.

STEP 3. Check of open circuit in earth line 
between headlamp assembly (TURN: LH) 
connector, side turn-signal lamp (LH) connector 
or rear combination lamp (TURN: LH) connector 
and the body earth

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Repair the connector(s) or wiring harness.

STEP 4. Check of open circuit in TL1&TL2-1 line 
between ETACS-ECU connector and headlamp 
assembly (TURN: LH) connector

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair the connector(s) or wiring harness.

STEP 5. Check of open circuit in TL1&TL2-1 line 
between ETACS-ECU connector and side 
turn-signal lamp (LH) connector <Fender panel 
attachment type>

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the connector(s) or wiring harness.

HEADLAMP

CHASSIS ELECTRICAL

54A-91

STEP 6. Check of open circuit in TL3-1&TL3-2 
line between ETACS-ECU connector and rear 
combination lamp (TURN: LH) connector

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Repair the connector(s) or wiring harness.

STEP 7. Check of open circuit in TL2-2 line 
between ETACS-ECU connector and side 
turn-signal lamp (LH) connector <Integrated in 
door mirror type>

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Repair the connector(s) or wiring harness.

STEP 8. Check whether the diagnosis code is 
reset.
(1) Erase the diagnosis code.
(2) Turn the ignition switch from "LOCK" (OFF) 

position to "ON" position.

(3) Check if diagnosis code is set.

Q: Is the diagnosis code set?

YES : 

Replace the ETACS-ECU.

NO : 

The trouble can be an intermittent 
malfunction (Refer to GROUP 00 

− How to 

use Troubleshooting/inspection Service 
Points 

− How to Cope with Intermittent 

Malfunction ).

Code No.B16A3 Turn-signal (LH) circuit short

CAUTION

• Before replacing the ECU, ensure that the 

power supply circuit, the earth circuit and the 
communication circuit are normal.

• When the ETACS-ECU of vehicles without 

KOS is replaced, the encrypted code of the 
ignition key needs to be registered to the 
ETACS-ECU. (If the encrypted code is not reg-
istered, the engine cannot be started. Regis-
ter the encrypted code as described in 
Immobilizer System 

− How to Register Key ID 

P.54A-33

.)

DIAGNOSTIC FUNCTION

When the left wiring harness of turn-signal lamp is 
short circuited, the ETACS-ECU sets diagnosis code 
No. B16A3.

JUDGEMENT CRITERIA

With the diagnosis code not set, when the short cir-
cuit is detected three times consecutively, the 
ETACS-ECU sets the diagnosis code No. B16A3.

PROBABLE CAUSES

• Damaged harness wires and connectors

• Malfunction of the ETACS-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check of short circuit in TL1&TL2-1 line 
between ETACS-ECU connector and headlamp 
assembly (TURN: LH) connector

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the connector(s) or wiring harness.

STEP 2. Check of short circuit in TL1&TL2-1 line 
between ETACS-ECU connector and side 
turn-signal lamp (LH) connector <Fender panel 
attachment type>

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair the connector(s) or wiring harness.

STEP 3. Check of short circuit in TL3-1&TL3-2 
line between ETACS-ECU connector and rear 
combination lamp (TURN: LH) connector

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair the connector(s) or wiring harness.

STEP 4. Check of short circuit in TL2-2 line 
between ETACS-ECU connector and side 
turn-signal lamp (LH) connector <Integrated in 
door mirror type>

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair the connector(s) or wiring harness.

STEP 5. Check whether the diagnosis code is 
reset.
(1) Erase the diagnosis code.
(2) Turn the ignition switch from "LOCK" (OFF) 

position to "ON" position.

(3) Check if diagnosis code is set.

HEADLAMP

CHASSIS ELECTRICAL

54A-92

Q: Is the diagnosis code set?

YES : 

Replace the ETACS-ECU.

NO : 

The trouble can be an intermittent 
malfunction (Refer to GROUP 00 

− How to 

use Troubleshooting/inspection Service 
Points 

− How to Cope with Intermittent 

Malfunction ).

Code No.B16A4 Turn-signal (RH) bulb outage

CAUTION

• Before replacing the ECU, ensure that the 

power supply circuit, the earth circuit and the 
communication circuit are normal.

• When the ETACS-ECU of vehicles without 

KOS is replaced, the encrypted code of the 
ignition key needs to be registered to the 
ETACS-ECU. (If the encrypted code is not reg-
istered, the engine cannot be started. Regis-
ter the encrypted code as described in 
Immobilizer System 

− How to Register Key ID 

P.54A-33

.)

DIAGNOSTIC FUNCTION

When the right bulb of turn-signal lamp is blown, the 
ETACS-ECU sets diagnosis code No. B16A4.

JUDGEMENT CRITERIA

The ETACS-ECU sets diagnosis code No. B16A4 
under the following conditions.

i. With the diagnosis code not set, if there is a mal-

function to the right turn-signal lamp bulb, the 
blown right bulb counter counts once when the 
illumination of hazard or turn-signal lamp (right 
side) is attempted.

ii. If the blown right bulb counter reaches "3," the 

diagnosis code No. B16A4 is set.

PROBABLE CAUSES

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

• Malfunction of turn-signal lamp assembly (right 

side) <Integrated in door mirror type>

• Damaged harness wires and connectors

• Malfunction of the ETACS-ECU

DIAGNOSIS PROCEDURE

STEP 1. Bulb check
Check whether the bulb of turn-signal lamp which 
does not illuminate is normal.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Replace the bulb of turn-signal lamp which 
does not illuminate.

STEP 2. Resistance measurement at the 
headlamp assembly (TURN: RH) connector, side 
turn-signal lamp (RH) connector and rear 
combination lamp (TURN: RH) connector
(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Measure the resistance between the connector 

terminal of lamp which does not illuminate and 
the body earth.

• Measure the resistance between the head-

lamp assembly (TURN: RH) connector (earth 
terminal) and the body earth.

• Measure the resistance between the side 

turn-signal lamp (RH) connector (earth termi-
nal) and the body earth.

• Measure the resistance between the rear 

combination lamp (TURN: RH) connector 
(earth terminal) and the body earth.

OK: Continuity exists (2 

Ω or less)

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Go to Step 3.

STEP 3. Check of open circuit in earth line 
between headlamp assembly (TURN: RH) 
connector, side turn-signal lamp (RH) connector 
or rear combination lamp (TURN: RH) connector 
and the body earth

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Repair the connector(s) or wiring harness.

STEP 4. Check of open circuit in TR1&TR2-1 line 
between ETACS-ECU connector and headlamp 
assembly (TURN: RH) connector

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair the connector(s) or wiring harness.