Mitsubishi Colt Ralliart. Manual - part 370

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-224

DIAGNOSIS PROCEDURE

Step 1.Connector check: D-08 front door lock 
actuator (RH) connector

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the defective connector.

Step 2. Check the front door lock actuator (RH).
Refer to GROUP 42 

− Door 

P.42-46

.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Replace the front door lock actuator (RH).

Step 3. Resistance measurement at the D-08 front 
door lock actuator (RH) connector

(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Resistance between D-08 front door lock actuator 

(RH) connector terminal No.3 and body earth

OK: Continuity exists (2 

Ω or less)

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Go to Step 4.

AC313837

Connector: D-08

D-08 (B)

AB

Harness side

AC313837

Connector: D-08

D-08 (B)

AB

Harness side

AC310506 DS

Connector D-08
(Harness side)

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INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-225

Step 4. Check the wiring harness between D-08 
front door lock actuator (RH) connector terminal 
No.3 to body earth D-08

NOTE: 

Prior to the wiring harness inspection, check interme-
diate connector B-21, and repair if necessary.

• Check the earth wires for open circuit.

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 : 

Repair the wiring harness.

Step 5. Connector check: B-132 ETACS-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the defective connector.

Step 6. Check the wiring harness from D-08 front 
door lock actuator (RH) connector terminal No.1 
and 2 to B-132 ETACS-ECU connector terminal 
No.41 and 36.

NOTE: 

Prior to the wiring harness inspection, check interme-
diate connector B-21, and repair if necessary.

• Check the input line for open circuit.

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Repair the wiring harness.

AC313837

Connector: D-08

D-08 (B)

AB

Harness side

AC401055

Connector: B-21

AB

AC313826 AD

Connector: B-132

Junction block (Rear view)

Harness side

AC313826 AD

Connector: B-132

Junction block (Rear view)

Harness side

AC313837

Connector: D-08

D-08 (B)

AB

Harness side

AC401055

Connector: B-21

AB

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INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-226

Step 7. Retest the system.
Check that the driver's door lock actuator switch sig-
nal is received 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.

Inspection Procedure N-12: Each switch signal of the keyless entry transmitter is not received.

CAUTION

Whenever the ECU is replaced, ensure that the 
input signal circuit is normal.

COMMENTS ON TROUBLE SYMPTOM

Input signal from the keyless entry transmitter is 
used to operate the keyless entry system. If the sig-
nal is abnormal, the keyless entry system will not 
work normally.

• Keyless entry system

• Keyless entry hazard answerback 

• Multi-mode keyless entry system

POSSIBLE CAUSES

• Malfunction of the keyless entry transmitter

• Defective battery of the keyless entry transmitter

• Malfunction of the ETACS-ECU

KEYLESS ENTRY 
TRANSMITTER

KEYLESS ENTRY 
RECEIVER

ETACS-ECU

Transmitter Input Circuit

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INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-227

DIAGNOSIS PROCEDURE

Step 1. Pulse check
Check whether the ETACS-ECU receives signal from 
a transmitter or not. For this check, you should use 
the 2-button-type transmitter (integrated with a key), 
which cover screw is silver and has already been 
registered.
NOTE: For how to register the keyless entry trans-
mitter encrypted code, refer to GROUP 42 

−

 

On-vehicle Service 

P.42-62

.

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

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Go to Step 4.

Step 2. Register the encrypted code, and then 
retest the system.

1. Register the keyless entry transmitter again.
2. Check that each signal is received from the key-

less entry transmitter.

Q: Is the check result normal?

YES : 

Accidental erasure of the encrypted code Or 

the key is mismatched. Check that the 
customer is an authorised person.

NO : 

Go to Step 3 (including the case that key 
registration is not possible).

Step 3. Replace the battery of the keyless entry 
transmitter, and retest the system.

1. Replace the battery of the keyless entry transmit-

ter.

2. Check that each signal is received from the key-

less entry transmitter.

Q: Is the check result normal?

YES : 

Flat battery.

NO : 

Go to Step 4.

Step 4. Register the encrypted code again by 
using a known good keyless entry transmitter. 
Then retest the system.

1. Register a known good keyless entry transmitter 

(the one which mounting screws are silver).

2. Check that each signal is received from the key-

less entry transmitter.

Q: Is the check result normal?

YES : 

Replace the original keyless entry 

transmitter.

NO : 

Replace the ETACS-ECU (including the 
case where registration is impossible).

System switch

Check 
conditions

Keyless entry transmitter 
"LOCK/UNLOCK" switch

When the switch 
is turned from off 
to on

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