Mitsubishi Colt Ralliart. Manual - part 335

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-84

KEYLESS ENTRY SYSTEM

INSPECTION PROCEDURE E-1: Keyless entry system does not work.

CAUTION

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

COMMENTS ON TROUBLE SYMPTOM

If the keyless entry system does not work normally, 
the input signal circuits to the components below or 
the ETACS-ECU may be defective.

• Key reminder switch

• All of the door switches

• Keyless entry transmitter

• Driver's door lock actuator

POSSIBLE CAUSES

• Malfunction of the key reminder switch

• Malfunction of the door switches

• Malfunction of the keyless entry transmitter

• Malfunction of the driver's door lock actuator

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSTIC PROCEDURE

Step 1. Check the power supply circuit.
When the ignition switch is turned to the LOCK 
(OFF) position, check if the hazard warning lamps 
illuminate.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Refer to Inspection Procedure A-2 "When 
the ignition switch is at the LOCK (OFF) 
position, the functions do not work normally. 
Check the battery power supply circuit to 
the ETACS-ECU 

P.54B-43

."

Keyless Entry System Function Circuit

ETACS-ECU

INPUT SIGNAL

· ALL OF THE DOOR SWITCHES
· DRIVER'S DOOR LOCK ACTUATOR SWITCH
· KEYLESS ENTRY TRANSMITTER SWITCH
· KEY REMINDER SWITCH

KEYLESS ENTRY
RECEIVER

Main

Index

Group

TOC

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-85

Step 2. Pulse check
Check the input signals below which are related to 
the keyless entry system.

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

Q: Are the check result normal?

All the signals are received normally. : 

Go to Step 

3.

The key reminder switch signal is not received. : 

Refer to Inspection Procedure N-7 "The key 
reminder switch signal is not received 

P.54B-210

."

All the door switch signals are not received. : 

Refer to Inspection Procedure N-10 "All the 
door switch signals are not received 

P.54B-219

."

The driver's door lock actuator switch signal is not 
received. : 

Refer to Inspection Procedure N-11 

"The driver's door lock actuator signal is not 
received 

P.54B-223

."

The keyless entry transmitter switch signal is not 
received. : 

Refer to Inspection Procedure N-12 

"Each switch signal of the keyless entry 
transmitter is not received 

P.54B-226

."

Step 3. Retest the system.
Check the keyless entry system 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.

System switch

Check condition

Key reminder switch

When the inserted 
ignition key is pulled out

All of the door switches

A door is opened when 
all the doors are closed

Driver's door lock 
actuator switch

When the driver's key 
cylinder or inside lock 
knob is unlocked or 
locked

Keyless entry transmitter 
switch

When the switch is 
turned from off to on

Main

Index

Group

TOC

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-86

INSPECTION PROCEDURE E-2: Keyless Entry hazard lamp answerback function or the Room Lamp 
Answerback 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

If the hazard warning lamp and the room lamp work 
normally, the ETACS-ECU may be defective.
Alternatively, it is possible that the keyless entry haz-
ard lamp answerback function was disabled by the 
customize function.

POSSIBLE CAUSES

• Malfunction of the turn-signal lamp

• Malfunction of the room lamp

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Check the operation of the hazard 
warning lamp.
Check that the hazard warning lamps illuminate nor-
mally.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Refer to inspection procedure L-2 "The 
hazard warning lamps do not illuminate 

P.54B-169

."

Step 2. Check the operation of the room lamps.
Check that the room lamps illuminate normally.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Refer to inspection procedure M-1 "The 
Interior lamp (room lamp, luggage 
compartment lamp) does not illuminate or 
extinguish normally 

P.54B-183

."

Step 3. Check the power supply circuit.
When the ignition switch is turned to the LOCK 
(OFF) position, check if the hazard warning lamps 
illuminate.

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Refer to Inspection Procedure A-2 "When 
the ignition switch is at the LOCK (OFF) 
position, the functions do not work normally. 
Check the battery power supply circuit to 
the ETACS-ECU 

P.54B-43

."

Step 4. Retest the system.
Check that the keyless entry hazard lamp answer-
back function or the room lamp answerback function 
work 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.

Main

Index

Group

TOC

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-87

INSPECTION PROCEDURE E-3: Encrypted Code cannot be Registered.

CAUTION

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

COMMENTS ON TROUBLE SYMPTOM

If the encrypted code registration mode is not 
entered, the key reminder switch, the hazard warning 
lamp switch or the ETACS-ECU may be defective.
If the registration is not possible although the regis-
tration mode is entered, the keyless entry transmitter 
or the ETACS-ECU may be defective.

POSSIBLE CAUSES

• Malfunction of the keyless entry transmitter

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Check the encrypted code registration 
mode.
Check that the encrypted code registration mode is 
entered.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Go to Step 3.

INPUT SIGNAL

ETACS-ECU

· HAZARD WARNING LAMP SWITCH
· KEYLESS ENTRY TRANSMITTER SWITCH
· KEY REMINDER SWITCH

Encrypted Transmitter Code Register Mode

Main

Index

Group

TOC