Mitsubishi Colt Ralliart. Manual - part 407

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-136

Step 9. Connector check: B-133 ETACS-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 10.

NO : 

Repair the defective connector.

Step 10. Check the wiring harness from B-133 
ETACS-ECU connector terminal No.62 to B-140 
key reminder switch connector terminal No.1

• Check the input and output lines for open circuit.

Q: Is the check result normal?

YES : 

Go to Step 11.

NO : 

Repair the wiring harness.

Step 11. Retest the system
Check that the ignition key cylinder illumination lamp 
illuminates/extinguishes 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.

AC313872

Connector: B-133

AF

Harness side

52 51

69

60

53

54

71

63 62 61

70

56

65

58

73

67

57

66

72

64

55

59

68

74

B-133(GR)

AC313872

Connector: B-133

AF

Harness side

52 51

69

60

53

54

71

63 62 61

70

56

65

58

73

67

57

66

72

64

55

59

68

74

B-133(GR)

AC401044

Connector: B-140

AB

Harness side

B-140(B)

Main

Index

Group

TOC

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-137

HEADLAMP AND TAIL LAMP

INSPECTION PROCEDURE J-1: The tail lamps do not illuminate normally.

CAUTION

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

COMMENTS ON TROUBLE SYMPTOM

If all the tail lamps do not illuminate, the tail lamp 
switch input circuit or the ETACS-ECU may be defec-
tive.

POSSIBLE CAUSES

• Malfunction of the column switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

Tail Lamp Relay 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 : Gray     R : Red     P : Pink     V : Violet

ETACS-ECU

· TAIL LAMP
· POSITION LAMP
· LICENCE PLATE LAMP

FUSIBLE
LINK

1

TAIL LAMP SWITCH

INPUT SIGNAL

TAIL
LAMP
RELAY

J/B SIDE

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TOC

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-138

DIAGNOSIS PROCEDURE

Step 1. ECU check by using the SWS monitor.
Check that the power supply and earth lines to the 
column switch (column-ECU) and the ETACS-ECU 
and the SWS communication lines are normal.

• Ignition switch: OFF

ECU TO BE CHECKED

• COLUMN ECU

• ETACS ECU

OK: "OK" are displayed for all the items

Q: Are the check results normal?

"OK" are displayed for all the items : 

Go to Step 2.

"NG" is displayed on the "COLUMN ECU" menu. : 

Refer to Inspection Procedure A-2 
"Communication with column switch 
(column-ECU) is not possible 

P.54C-37

."

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

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

P.54C-41

."

Step 2. Function diagnosis by using the SWS 
monitor
Check the SWS communication signal, which are 
related to the tail lamps.

<Selected item> LIGHTING - TAIL LAMP

• Ignition switch: ON

• Lighting switch: TAIL

OK: Normal conditions are displayed for all 
the items

Q: Are the check results normal?

Normal conditions are displayed for all the items. : 

Go to Step 3.

Normal condition is not displayed for item 00, 01 or 
03. : 

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

P.54C-208

."

Normal condition is not displayed for item No.30. : 

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

P.54C-203

."

Step 3. Connector check: B-134 ETACS-ECU 
connector.

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair the defective connector.

Step 4. Voltage measurement at 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.16 and body earth

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Go to Step 5.

Item No.

Item name

Normal 
condition

Item 00

HEADLAMP SW

OFF

Item 01

TAIL LAMP SW

ON

Item 03

PASSING SW

OFF

Item 30

IG SW(IG1)

ON

AC313872 AH

Connector: B-134

Harness side

Junction block (Rear view)

AC313872 AH

Connector: B-134

Harness side

Junction block (Rear view)

AC313972

Connector B-134
 (Harness side)

AT

Main

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SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-139

Step 5. Check the wiring harness between B-134 
ETACS-ECU connector terminal No.16 and the 
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.

Step 6. Retest the system.
Check that the tail lamps illuminate 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.

AC313872 AH

Connector: B-134

Harness side

Junction block (Rear view)

AC313870

Connector: B-108

BD

Junction block (Front view)

B-108(B)

Harness side

Main

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