Mitsubishi Lancer Evolution IX. Manual - part 193

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-31

COMMENTS ON TROUBLE SYMPTOM

The power supply circuit to the column switch (col-
umn-ECU) may be defective. If the wiring harness of 
the battery power supply circuit for the ECU (column 
switch terminal No.1) is defective, also check the 
power supply circuit to the ignition switch (IG1) (col-
umn switch terminal No.9) and repair if necessary.

TROUBLESHOOTING HINTS

• Malfunction of the ETACS-ECU

• Malfunction of the column switch

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. 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: OFF

ECUS TO BE CHECKED

• ETACS ECU

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

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

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

P.54C-36

."

Step 2. Connector check: C-206 column switch 
connector

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair the defective connector.

AC310479

AD

Connector: C-206 <LHD>

Harness side

AC310481AD

Connector: C-206 <RHD>

Harness side

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-32

Step 3. Voltage measurement at C-206 column 
switch connector

(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Voltage between C-206 column switch connector 

terminal No.1 and body earth

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Go to Step 4.

Step 4. Check the wiring harness between C-206 
column switch connector terminal No.1 and 
battery.

AC310479

AD

Connector: C-206 <LHD>

Harness side

AC310481AD

Connector: C-206 <RHD>

Harness side

AC310507 AF

Connector C-206 
(Harness side)

10

5

6

7

9 8

3

4

2 1

AC310479

AD

Connector: C-206 <LHD>

Harness side

AC310481AD

Connector: C-206 <RHD>

Harness side

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-33

NOTE: 

Prior to the wiring harness inspection, check interme-
diate connector C-129, joint connector C-05, 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 

Cope with Intermittent Malfunction 

P.00-5

).

NO : 

Repair the wiring harness.

Step 5. Resistance measurement at C-206 
column switch connector

(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Continuity between C-206 column switch 

connector terminal No.4 and body earth

OK: 2 

Ω or less

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Go to Step 6.

AC310447

Connectors: C-05, C-129 <LHD>

C-05 (GR)

C-129

C-05

C-129

AC

AC310455

Connectors: C-05, C-129 <RHD>

C-05 (GR)

C-129

C-05

C-129

AB

AC310479

AD

Connector: C-206 <LHD>

Harness side

AC310481AD

Connector: C-206 <RHD>

Harness side

AC310506AK

Connector C-206 
(Harness side)

10

5

6

7

9 8

3

4

2 1

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-34

Step 6. Check the wiring harness between C-206 
column switch connector terminal No.4 and body 
earth.

NOTE: 

Prior to the wiring harness inspection, check joint 
connector C-06, 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 

Cope with Intermittent Malfunction 

P.00-5

).

NO : 

Repair the wiring harness.

Step 7. Connector check: C-228 ETACS-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Repair the defective connector.

AC310479

AD

Connector: C-206 <LHD>

Harness side

AC310481AD

Connector: C-206 <RHD>

Harness side

AC310452

Connector: C-06 <LHD>

AB

C-06 (GR)

AC310456

Connector: C-06 <RHD>

AB

C-06 (GR)

AC310450

Connector: C-228 <LHD>

AC

Junction block (rear view)

C-228 (GR)

Harness side

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AC310461

Junction block (rear view)

Connector: C-228 <RHD>

AC

Harness side

C-228 (GR)

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