Mitsubishi Colt Ralliart. Manual - part 382

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-36

Step 6. Connector check: B-32 diagnosis 
connector, B-133 ETACS-ECU connector

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Repair the defective connector.

Step 7. Check the wiring harness from B-133 
ETACS-ECU connector terminal Nos. 52 and 69 to 
B-32 diagnosis connector terminal Nos. 9 and 1.

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Repair the wiring harness.

Step 8. Retest the system.
Check that the ETACS-ECU communicates with the 
SWS monitor.

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.

AC401055

AF

Connector: B-32

B-32 (B)

Harness side

AC313826AC

B-133 (GR)

Connector: B-133

Harness side

Junction block (Rear view)

AC401055

AF

Connector: B-32

B-32 (B)

Harness side

AC313826AC

B-133 (GR)

Connector: B-133

Harness side

Junction block (Rear view)

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SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-37

INSPECTION PROCEDURE A-2: Communication with the column switch (column-ECU) is not 
possible.

CAUTION

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

FUSIBLE
LINK

1

IGNITION
SWITCH (IG1)

COLUMN
SWITCH

COLUMN-ECU

ETACS-ECU

DIAGNOSIS
CONNECTOR

FRONT SIDE

Column Switch Power Supply and SWS Communication Circuit

Wire colour code
B : Black     LG : Light green     G : Green     L : Blue     W : White     Y : Yellow     SB : Sky blue
BR : Brown     O : Orange     GR : Grey     R : Red     P : Pink     V : Violet     PU : Purple

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SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-38

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

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 2.

NO : 

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

P.54C-41

."

Step 2. Connector check: B-135 column switch 
connector

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair the defective connector.

Step 3. Voltage measurement at the B-135 
column switch connector.

(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Voltage between B-135 column switch connector 

No.1 and body earth

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Go to Step 4.

AC401044AC

Connector: B-135

Harness side

AC401044AC

Connector: B-135

Harness side

AC310507FB

Connector B-135 
(Harness side)

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SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-39

Step 4. Check the wiring harness between B-135 
column switch connector terminal No.1 to fusible 
link (1).

NOTE: 

Prior to the wiring harness inspection, check junction 
block connectors B-108, B-131 and joint connector 
B-22, 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.

Step 5. Resistance measurement at the B-135 
column switch connector.

(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Continuity between B-135 column switch 

connector No.4 and body earth

OK: Continuity exists (2 

Ω or less)

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Go to Step 6.

AC401044AC

Connector: B-135

Harness side

AC401055

Connector: B-22

AD

AC313870

Connector: B-108

BD

Junction block (Front view)

B-108(B)

Harness side

AC313872

Connector: B-131

BD

Harness side

AC401044AC

Connector: B-135

Harness side

AC310506 DX

Connector B-135 
(Harness side)

10

5

6

7

9 8

3

4

2 1

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