Mitsubishi Lancer Evolution IX. Manual - part 158

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-195

Step 5. Retest the system.
Check that the turn-signal 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 ETACS-ECU.

Step 6. Pulse check
Check the input signals below, which are related to 
the turn-signal lamp illumination.

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 

7.

The turn-signal lamp switch (RH) 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

."

The turn-signal lamp switch (LH) 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 7. Retest the system.
Check that the turn-signal lamps illuminate.

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.

System switch

Check condition

Turn-signal lamp switch 
(RH)

When the turn-signal 
lamp switch (RH) is 
turned from off to on

Turn-signal lamp switch 
(LH)

When the turn-signal 
lamp switch (LH) is 
turned from off to on

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-196

INSPECTION PROCEDURE I-2: The hazard warning lamps do not illuminate.

CAUTION

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

COMMENTS ON TROUBLE SYMPTOM

If the hazard warning lamps do not illuminate, the 
hazard warning lamp input signal circuit or the 
ETACS-ECU may be defective.

POSSIBLE CAUSES

• Malfunction of the hazard warning lamp switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSTIC PROCEDURE

Step 1. Check that the turn-signal lamps operate.
Check that the turn-signal lamps illuminate normally.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Refer to inspection procedure I-1 "The 
turn-signal lamps do not illuminate 

P.54B-191

."

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

· COMBINATION METER

ETACS-ECU

HAZARD
WARNING
LAMP SWITCH

RELAY
BOX

TURN-SIGNAL
LAMP RELAY: LH

TURN-SIGNAL
LAMP RELAY: RH

INPUT SIGNAL

· HEADLAMP
  ASSEMBLY (LH)

· SIDE TURN SIGNAL
  LAMP (LH)

· REAR COMBINATION
  LAMP (LH)

· COMBINATION METER
· HEADLAMP
  ASSEMBLY (RH)

· SIDE TURN SIGNAL
  LAMP (RH)

· REAR COMBINATION
  LAMP (RH)

J/B SIDE

Hazard Warning Lamp Circuit

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-197

Step 2. Check the power supply circuit.
When the ignition switch is at the LOCK (OFF) posi-
tion, check that the functions below work normally.

• Lamp reminder function

• Central door locking system

• Dome lamp (excluding interior lamp automatic 

shutdown function)

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Refer to inspection procedure A-2 "Check 
the battery power supply circuit to the 
ETACS-ECU 

P.54B-42

."

Step 3. Pulse check
Check the input signal from the hazard warning lamp 
switch.

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

Q: Is the check result normal?

The signal is received normally. : 

Go to Step 4.

The hazard warning lamp switch signal is not 
received. : 

Refer to inspection procedure L-9 "The 

hazard warning lamp switch signal is not 
received 

P.54B-261

."

Step 4. Retest the system.
Check that the hazard warning lamps illuminate.

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.

System switch

Check condition

Hazard warning lamp 
switch

When the hazard 
warning lamp switch is 
turned from off to on

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-198

INSPECTION PROCEDURE I-3: Any of the turn-signal lamps does not illuminate. <LH drive vehicles>

CAUTION

Whenever the ECU is replaced, ensure that the 

input and output signal circuits are normal.

COMMENTS ON TROUBLE SYMPTOM

If any of the turn-signal lamp does not illuminate nor-

mally, wiring harness connector(s) or the bulb may 

be defective.

POSSIBLE CAUSES

• Defective turn-signal lamp bulb

• Damaged harness wires and connectors

SIDE 
TURN 
SIGNAL 
LAMP
(LH)

TURN-SIGNAL 
LAMP RELAY: LH

HEADLAMP
ASSEMBLY
(LH)

HEADLAMP
ASSEMBLY
(RH)

REAR 
COMBINATION
LAMP (RH)

REAR 
COMBINATION
LAMP (LH)

SIDE TURN 
SIGNAL LAMP
(RH)

COMBINATION
METER

J/B SIDE

ETACS-ECU

TURN-SIGNAL 
LAMP RELAY: RH

Turn-Signal Lamps Circuit <LHD>

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