Mitsubishi Outlander XL. Manual - part 991

Inspection Procedure 5: The headlight(s) do not illuminate.

M15410900102USA0000010000

If the discharge type headlights do not illuminate,
fully  understand  the  precautions  in  "Service

precautions  for  discharge  headlight"  before
proceeding with the troubleshooting. Refer to P.
54Ac-12.

Headlights Circuit

HEADLIGHT
(HIGH: RH)

HEADLIGHT
(HIGH: LH)

HEADLIGHT
ASSEMBLY
(RH)

HEADLIGHT
ASSEMBLY
(LH)

HEADLIGHT
RELAY (LOW)

HEADLIGHT
RELAY (HIGH)

RELAY
BOX

LIGHTING

54Ac-37

DIAGNOSIS

Headlights Circuit

HEADLIGHT
(HIGH: RH)

HEADLIGHT
(HIGH: LH)

HEADLIGHT
ASSEMBLY
(LH)

HEADLIGHT
ASSEMBLY
(RH)

DISCHARGE-ECU

DISCHARGE-ECU

HEADLIGHT
RELAY 
(LOW)

HEADLIGHT
RELAY 
(HIGH)

RELAY
BOX

ZC6041270001

Connector: A-20X

54Ac-38

LIGHTING

DIAGNOSIS

ZC6041270000

Connector: A-28X

ZC6008720007

Connector: A-37, A-38

A-37 (B)

A-38 (B)

ZC6008710010

Connector: A-55, A-56

A-56 (B)

A-55 (B)

TECHNICAL DESCRIPTION (COMMENT)
If any of the headlights do not illuminate, the wiring
harness,  connector(s),  or  the  bulb  may  have  a
problem, or the fuse may be burned out.

TROUBLESHOOTING HINTS

｠

Malfunction of the headlight bulbs

｠

Malfunction of the headlight assembly

｠

Damaged harness wires and connectors

DIAGNOSIS

Required Special Tools:

｠

MB992006: Extra fine probe

｠

MB991223: Harness set

STEP 1. Check headlight (LOW) connector A-37 <LH>, A-56
<RH>, headlight (HIGH) connector A-38 <LH>, A-55 <RH> for
loose, corroded or damaged terminals, or terminals pushed
back in the connector.

Q:Is headlight (LOW) assembly connector A-37 <LH>, A-56

<RH>, headlight (HIGH) connector A-38 <LH>, A-55 <RH>

in good condition?

YES:

 Go to Step 2.

LIGHTING

54Ac-39

DIAGNOSIS

NO:

 Repair the defective connector.

STEP 2. Check bulb.
Check the bulb(s) of headlight that does not illuminate.

NOTE: 

If discharge-type lower beam headlights do not

illuminate, their bulbs cannot be inspected. In this case,
assume the bulbs to be normal and proceed with steps.

Q:Is the bulb in good condition?

YES:

 Go to Step 3.

NO:

 Replace the bulb(s) of the light that does not

illuminate.

STEP 3. Check the ground circuit to the headlight assembly
(LOW) or headlight assembly (HIGH). Measure the
resistance at headlight assembly (LOW) connector A-37
<LH>, A-56 <RH> or headlight assembly (HIGH) connector
A-38 <LH>, A-55 <RH>.

(1)

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

ZC5010410048

Harness side: A-37, A-56

ZC5010410050

Harness side: A-37, A-56

ZC5010410049

Harness side: A-38, A-55

(2)

Resistance between the connector of light which does not
illuminate and ground.

｠

Resistance between the A-37 (LH), A-56 (RH) headlight
assembly  connector  terminal  8  and  ground.  <Halogen
headlight (LOW)>

｠

Resistance between the A-37 (LH), A-56 (RH) headlight
assembly  connector  terminal  9  and  ground.  <Discharge
headlight (LOW)>

｠

Resistance between the A-38 (LH), A-55 (RH) headlight
assembly connector terminal 2 and ground. <HIGH>

OK: The resistance should be 2 Ω or less.

Q:Is the measured resistance 2 Ω or less?

YES:

 Go to Step 5.

NO:

 Go to Step 4.

STEP 4. Check the wiring harness between headlight
assembly (LOW) connector A-37 <LH>, A-56 <RH> (terminal

54Ac-40

LIGHTING

DIAGNOSIS