Mitsubishi Lancer Evolution IX. Manual — part 235

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-199

INSPECTION PROCEDURE H-8: The headlamp(s) do not illuminate. <including high-beam indicator>

CAUTION

Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.

COMMENTS ON TROUBLE SYMPTOM

If any of the headlamps or the high-beam indicator
does not illuminate, the wiring harness connector(s),
the bulb or the fuse may be defective or burned out.

POSSIBLE CAUSES

• Malfunction of the headlamp bulbs

• Malfunction of the high-beam indicator bulb

• Damaged harness wires and connectors

Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet

HEADLAMP
(HI: RH)

HEADLAMP
(HI: LH)

HEADLAMP
ASSEMBLY
(LH) (LO)

HEADLAMP
ASSEMBLY
(RH) (LO)

COMBINATION
METER

RELAY
BOX

FRONT-ECU

HEADLAMP
RELAY: HI

HEADLAMP
RELAY: LO

Headlamps Circuit

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-200

DIAGNOSTIC PROCEDURE

Step 1. Connector check: A-31 <headlamp (LO)
RH>, A-39 <headlamp (LO) LH>, A-21 <headlamp
(HI) RH>, A-15 <headlamp (HI) LH> headlamp
assembly connector or C-01 <high-beam
indicator> combination meter connector

AC310543

Connectors: A-15, A-31

AC

<LHD>

A-15

Harness side

A-31

Harness side

A-15

A-31

AC310476

Connectors: A-15, A-31

AC

<RHD>

A-15

Harness side

A-31

Harness side

A-15

A-31

AC310432

Connectors: A-21, A-39

AC

<LHD>

A-21

Harness side

A-39

Harness side

A-21

A-39

AC310434

Connectors: A-21, A-39

AC

<RHD>

A-21

Harness side

A-39

Harness side

A-21

A-39

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-201

Q: Is the check result normal?

YES :

Go to Step 2.

NO :

Repair the defective connector.

Step 2. Check the bulb(s) of the headlamps or the
high-beam indicator lamp.
Check the bulb(s) of the defective lamp.

Q: Is the check result normal?

YES :

Go to Step 3.

NO :

Replace the bulb(s) of the defective lamp.

AC310446

Connector: C-01
<LHD>

AM

Harness side

AC310456

Connector: C-01
<RHD>

AL

Harness side

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-202

Step 3. Resistance measurement at A-31
<headlamp (LO) RH>, A-39 <headlamp (LO) LH>,
A-21 <headlamp (HI) RH>, A-15 <headlamp (HI)
LH> headlamp assembly connector or C-01
<high-beam indicator> combination meter
connector

AC310543

Connectors: A-15, A-31

AC

<LHD>

A-15

Harness side

A-31

Harness side

A-15

A-31

AC310476

Connectors: A-15, A-31

AC

<RHD>

A-15

Harness side

A-31

Harness side

A-15

A-31

AC310432

Connectors: A-21, A-39

AC

<LHD>

A-21

Harness side

A-39

Harness side

A-21

A-39

AC310434

Connectors: A-21, A-39

AC

<RHD>

A-21

Harness side

A-39

Harness side

A-21

A-39