Mitsubishi Colt Ralliart. Manual - part 325

 

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Mitsubishi Colt Ralliart. Manual - part 325

 

 

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-44

DIAGNOSTIC PROCEDURE

Step 1. Connector check: B-134 ETACS-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the defective connector.

Step 2. Voltage measurement at the B-134 
ETACS-ECU connector.

(1) Remove the ETACS-ECU, and measure at the 

junction block side.

(2) Voltage between B-134 ETACS-ECU connector 

terminal No.20 and body earth.

OK: System voltage

Q: Is the check result normal?

YES : . 

Go to Step 4.

NO : . 

Go to Step 3.

Step 3. Check the wiring harness between B-134 
ETACS-ECU connector terminal No.20 and 
fusible link (1).

NOTE: 

Prior to the wiring harness inspection, check junction 
block connector B-108, and repair if necessary.

• 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 

use Troubleshooting/inspection Service 
Points 

− How to Cope with Intermittent 

Malfunction 

P.00-13

).

NO : 

Repair the wiring harness.

AC313826

Connector: B-134

AG

Junction block side

Junction block (Rear view)

AC313826

Connector: B-134

AG

Junction block side

Junction block (Rear view)

AC301541IQ

Connector B-134
(Junction block side)

AC313826

Connector: B-134

AG

Junction block side

Junction block (Rear view)

AC313870

Connector: B-108

BD

Junction block (Front view)

B-108(B)

Harness side

Main

Index

Group

TOC

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-45

Step 4. Resistance measurement at the B-134 
ETACS-ECU connector.

(1) Remove the ETACS-ECU, and measure at the 

junction block side.

(2) Continuity between B-134 ETACS-ECU 

connector terminal No.2 and body earth.

OK: Continuity exists (2 

 or less)

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Go to Step 5.

Step 5. Check the wiring harness between B-134 
ETACS-ECU connector terminal No.2 and body 
earth.

NOTE: 

Prior to the wiring harness inspection, check junction 
block connector B-130, 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 6. Retest the system.
Check that the battery power supply circuit to the 
ETACS-ECU is normal.

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.

AC313826

Connector: B-134

AG

Junction block side

Junction block (Rear view)

AC310506EM

Connector B-134 
(Junction block side)

2019

7

13

17

18

1615 14

10

11

12

9 8

2

6 5

3

4

1

AC313826

Connector: B-134

AG

Junction block side

Junction block (Rear view)

AC313826

Harness side

AE

Connector: B-130

Junction block (Rear view)

Main

Index

Group

TOC

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-46

BUZZER

INSPECTION PROCEDURE B-1: Lamp reminder buzzer 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.

• Ignition switch (IG1)

• Driver’s door switch

• Tail lamp switch

If this function does not work normally, these input 
signal circuit(s) or the ETACS-ECU may be defec-
tive.

POSSIBLE CAUSES

• Malfunction of the driver’s door switch

• Malfunction of the column switch

• 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

."

ETACS-ECU

INPUT SIGNAL

· DRIVER'S DOOR SWITCH

· TAIL LAMP SWITCH

· IGNITION SWITCH (IG1)

· HEADLAMP SWITCH

Lamp Reminder Buzzer Function

AC506264AB

Main

Index

Group

TOC

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-47

Step 2. Pulse check
Check the input signals below, which are related to 
the lamp reminder buzzer function.

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

Q: Are the check results normal?

All the signals are received normally. : 

Go to Step 

3.

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

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

P.54B-202

."

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

Refer to Inspection Procedure N-3 "The 
driver’s door switch signal is not received 

P.54B-204

."

The tail lamp switch signal is not received. : 

Refer 

to Inspection Procedure N-4 "The column 
switch (lighting and turn-signal lamp switch) 
signal is not received 

P.54B-206

."

The headlamp switch signal is not received. : 

Refer to Inspection Procedure N-4 "The 
column switch (lighting and turn-signal lamp 
switch) signal is not received 

P.54B-206

."

Step 3. Retest the system.
The lamp reminder buzzer function should work nor-
mally.

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

Ignition switch (IG1)

When turned from ACC 
to ON

Driver's door switch

When the driver's door is 
opened

Tail lamp switch

When the lighting switch 
is turned to the TAIL 
position

Headlamp switch

When the lighting switch 
is turned to the HEAD 
position

Main

Index

Group

TOC

 

 

 

 

 

 

 

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