Mitsubishi Lancer Evolution IX. Manual — part 149

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-159

NOTE:

Prior to the wiring harness inspection, check joint
connector C-23, and repair if necessary.

• Check the input and output lines for open circuit.

Q: Is the check result normal?

YES :

Go to Step 7.

NO :

Repair the wiring harness.

Step 7. Retest the system.
Check that the ignition key cylinder illumination lamp
illuminates/extinguishes normally.

Q: Is the check result normal?

YES :

The trouble can be an intermittent

malfunction (Refer to GROUP 00

− How to

Cope with Intermittent Malfunction

P.00-5

).

NO :

Replace the ETACS-ECU.

AC310446

Connector: C-23 <LHD>

AY

C-23 (B)

AC310456

Connector: C-23

AJ

<RHD>

C-23 (B)

Harness side

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-160

HEADLAMP AND TAIL LAMP

INSPECTION PROCEDURE H-1: The tail lamps do not illuminate normally.

CAUTION

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

COMMENTS ON TROUBLE SYMPTOM

If all the tail lamps do not illuminate, the tail lamp
switch input circuit or the front-ECU may be defec-
tive.

POSSIBLE CAUSES

• Malfunction of the column switch

• Malfunction of the front-ECU

• Damaged harness wires and connectors

DIAGNOSTIC PROCEDURE

Step 1. M.U.T.-II/III diagnosis code.
When the ignition switch is turned to the LOCK
(OFF) position, check that the ETACS-ECU does not
set the diagnosis code.

Q: Is the diagnosis code set?

YES :

Refer to diagnosis code chart

P.54B-14

.

NO :

Go to Step 2.

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

BATTERY

FRONT-ECU

TAIL LAMP
RELAY

RELAY
BOX

INPUT SIGNAL

· HEADLAMP AUTOMATIC
SHUTDOWN
· TAIL LAMP SWITCH

<LHD>
· HEADLAMP
ASSEMBLY (LH)
· REAR COMBINATION
LAMP (LH)
· COMBINATION METER
· LICENCE PLATE LAMP

<RHD>
· HEADLAMP
ASSEMBLY (LH)
· REAR COMBINATION
LAMP (LH)
· LICENCE PLATE LAMP

<LHD>
· HEADLAMP
ASSEMBLY (RH)
· REAR COMBINATION
LAMP (RH)

<RHD>
· HEADLAMP
ASSEMBLY (RH)
· REAR COMBINATION
LAMP (RH)
· COMBINATION METER

Taillamp Relay Circuit

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-161

Step 2. Pulse check
Check the input signal from the tail lamp switch.

OK: The M.U.T.-II/III sounds or the voltmeter
needle fluctuates.

Q: Is the check result normal?

All the signals are received normally. :

Go to Step

3.

The ignition switch (IG1) signal is not received. :

Refer to inspection procedure L-2 "The
ignition switch (IG1) signal is not received

P.54B-242

."

The tail lamp switch signal is not received. :

Refer

to inspection procedure L-4 "The column
switch (lighting and turn-signal lamp switch)
signal is not received

P.54B-248

."

Step 3. Connector check: A-10X front-ECU
connector

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Repair the defective connector.

Step 4. Voltage measurement at A-10X front-ECU
connector

(1) Remove the front-ECU, and measure at the relay

box side.

(2) Voltage between A-10X front-ECU connector

terminal No.5 and body earth

OK: System voltage

Q: Is the check result normal?

YES :

Go to Step 6.

NO :

Go to Step 5.

Step 5. Check the wiring harness between A-10X
front-ECU connector terminal No.5 and the
battery.

• Check the power supply line for open circuit.

Q: Is the check result normal?

YES :

The trouble can be an intermittent

malfunction (Refer to GROUP 00

− How to

Cope with Intermittent Malfunction

P.00-5

).

NO :

Repair the wiring harness.

System switch

Check condition

Ignition switch (IG1)

When turned from ACC
to ON

Tail lamp switch

When the lighting switch
is turned to the TAIL
position

AC310572AB

Connector: A-10X

Relay box side

10

11

5

9 8 7 6

4 3

1

2

Battery

AC310572AB

Connector: A-10X

Relay box side

10

11

5

9 8 7 6

4 3

1

2

Battery

AC301541 DB

Connector A-10X
(Relay box side)

5

11

9

10

8 7 6

2

4 3

1

AC310572AB

Connector: A-10X

Relay box side

10

11

5

9 8 7 6

4 3

1

2

Battery

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-162

Step 6. Retest the system.
Check that the tail lamps illuminate normally.

Q: Is the check result normal?

YES :

The trouble can be an intermittent

malfunction (Refer to GROUP 00

− How to

Cope with Intermittent Malfunction

P.00-5

).

NO :

Replace the front-ECU.

INSPECTION PROCEDURE H-2: The low-beam headlamps do not illuminate normally.

CAUTION

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

COMMENTS ON TROUBLE SYMPTOM

If the low-beam headlamps do not illuminate, the
headlamp switch input circuit or the front-ECU may
be defective.

POSSIBLE CAUSES

• Malfunction of the column switch

• Malfunction of the front-ECU

• Damaged harness wires and connectors

DIAGNOSTIC PROCEDURE

Step 1. M.U.T.-II/III diagnosis code.
When the ignition switch is turned to the LOCK
(OFF) position, check that the ETACS-ECU does not
set the diagnosis code.

Q: Is the diagnosis code set?

YES :

Refer to diagnosis code chart

P.54B-14

.

NO :

Go to Step 2.

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

BATTERY

FRONT-ECU

HEADLAMP
RELAY: LO

RELAY
BOX

INPUT SIGNAL

· HEADLAMP AUTOMATIC
SHUTDOWN
· TAIL LAMP SWITCH

HEADLAMP
ASSEMBLY (LH)

HEADLAMP
ASSEMBLY (RH)

Headlamp Relay (Low-Beam) Circuit