Mitsubishi Colt Ralliart. Manual - part 385

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-48

Step 4. ECU check by using the SWS monitor
Check that the power supply and earth lines to the 
ETACS-ECU and the SWS communication lines are 
normal.

• Ignition switch: ON

ECU TO BE CHECKED

• ETACS ECU

OK: "OK" is displayed on the "ETACS ECU" 
menu.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Refer to Inspection Procedure A-3 
"Communication with the ETACS-ECU is 
not possible 

P.54C-41

."

Step 5. SWS monitor data list
Check the SWS communication signal, which is 
related to the door-ajar warning buzzer function.

<Selected item> ETACS ECU

• Ignition switch: ON

• Driver’s door: Open

OK: Normal condition is displayed.

Q: Is the check result normal?

Normal conditions are displayed for all the items. : 

Go to Step 6.

Normal condition is not displayed for item No.30. : 

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

P.54C-203

."

Normal condition is not displayed for item No.32. : 

Refer to inspection procedure N-3 "The 
driver's door switch signal is not received 

P.54C-205

."

Normal condition is not displayed for item No.43. : 

Replace the ETACS-ECU.

Step 6. ETACS switch data by using the SWS 
monitor
Check the ETACS-ECU input signal related to the 
door-ajar warning buzzer function.

• Doors other than the driver's door (including the 

tailgate): Closed to open

OK: Normal condition is displayed.

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Refer to inspection procedure N-10 "All the 
door switch signals are not received 

P.54C-222

."

Step 7. Retest the system.
Check that the door-ajar warning buzzer function 
works normally.

Q: Is the check result normal?

YES : 

The trouble can be an intermittent 

malfunction (Refer to GROUP 00 

− How to 

use Troubleshooting/inspection Service 
Points 

− How to Cope with Intermittent 

Malfunction 

P.00-13

).

NO : 

Replace the ETACS-ECU.

Item No.

Item name

Normal 
condition

Item 30

IG SW(IG1)

ON

Item 32

DR DOOR SW

ON

Item 43

BUZZER

ON

Item No.

Item name

Normal 
condition

Item 40

ALL DOOR SW

ON

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SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-49

INSPECTION PROCEDURE B-3: Turn-signal lamp operation sound function does not work normally.

CAUTION

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

COMMENTS ON TROUBLE SYMPTOM

The ETACS-ECU operates this function in accord-
ance with the input signals below.

• Turn-signal lamp switch

• Hazard warning lamp switch

If this function does not work normally, these input 
signal circuit(s) or the ETACS-ECU may be defec-
tive. Note that this function can be disabled/enabled 
by the customisation function (default setting; disa-
bled). In order to change the setting, the SWS moni-
tor is required.

POSSIBLE CAUSES

• Malfunction of the column switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSTIC PROCEDURE

Step 1. Check that the turn-signal lamps operate.
When the turn-signal lamp switch or the hazard 
warning lamp switch is operated, check that the 
turn-signal lamps flash.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

First, repair the turn-signal lamp(s) (Refer to 
Trouble Symptom Chart 

P.54C-29

).

Step 2. Customize function by using the SWS 
monitor
Use the SWS monitor customisation function to con-
firm that "T/SIG.BUZZER" is set to "W.FUNCTION".

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Use the SWS monitor customisation 
function to set "T/SIG.BUZZER" to 
"W.FUNCTION" (Refer to 

P.54C-240

).

Turn-Signal Lamp Operation Sound Function

ETACS-ECU

INPUT SIGNAL

·HAZARD WARNING LAMP SWITCH

·IGNITION SWITCH (IG1)

·TURN-SIGNAL SWITCH

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SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-50

Step 3. ECU check by using the SWS monitor
Check that the power supply and earth lines to the 
ETACS-ECU and the column switch (column-ECU) 
and the SWS communication lines are normal.

• Ignition switch: ON

ECU TO BE CHECKED

• ETACS-ECU

• Column ECU

OK: "OK" are displayed for all the items

Q: Is the check result normal?

Normal conditions are displayed for all the items. : 

Go to Step 4.

"NG" is displayed on the "ETACS ECU" menu. : 

Refer to Inspection Procedure A-3 
"Communication with the ETACS-ECU is 
not possible 

P.54C-41

."

"NG" is displayed on the "COLUMN ECU" menu. : 

Refer to Inspection Procedure A-2 
"Communication with the column switch 
(column-ECU) is not possible 

P.54C-37

."

Step 4. SWS monitor data list
Check the SWS communication input signal, which 
are related to the turn-signal lamp operation sound 
function.

<Selected item> ETACS-ECU

• Hazard warning switch: ON

OK: Normal conditions are displayed for all 
the items.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Replace the ETACS-ECU.

Step 5. Retest the system.
Check that the turn-signal lamp operation sound 
function works normally.

Q: Is the check result normal?

YES : 

The trouble can be an intermittent 

malfunction (Refer to GROUP 00 

− How to 

use Troubleshooting/inspection Service 
Points 

− How to Cope with Intermittent 

Malfunction 

P.00-13

).

NO : 

Replace the ETACS-ECU.

Item No.

Item name

Normal 
condition

Item 43

BUZZER

ON

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SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-51

CENTRAL DOOR LOCKING SYSTEM

INSPECTION PROCEDURE C-1: Central door locking system does not work.

CAUTION

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

COMMENT ON TROUBLE SYMPTOM

If the central door locking system does not work at 
all, the front door lock actuator (RH) or the 
ETACS-ECU may be defective.

POSSIBLE CAUSES

• Malfunction of the front door lock actuator (RH)

• Malfunction of the ETACS-ECU

• 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

ETACS-ECU

FUSIBLE 
LINK

FRONT
DOOR LOCK
ACTUATOR
(RH)

FRONT
DOOR LOCK
ACTUATOR
(LH)

REAR
DOOR LOCK
ACTUATOR
(LH)

REAR
DOOR LOCK
ACTUATOR
(RH)

DOOR
UNLOCK
RELAY

DOOR
LOCK
RELAY

TAILGATE
LOCK
ACTUATOR

J/B SIDE

Central Door Lock Power Supply Circuit

6

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