Mitsubishi Colt Ralliart. Manual - part 364

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-200

INPUT SIGNAL PROCEDURES

INSPECTION PROCEDURE N-1: The ignition switch (ACC) signal 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 ignition switch (ACC) is used to 
operate the functions below. If the signal is abnormal, 
these functions will not work normally.

• Windshield wiper and washer

• Rear wiper and washer

• Electric retractable remote controlled door mirror

POSSIBLE CAUSES

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Connector check: B-133 ETACS-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the defective connector.

Ignition Switch (ACC) Input Circuit

ETACS-ECU

IGNITION
SWITCH (ACC)

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

AC313826AC

B-133 (GR)

Connector: B-133

Harness side

Junction block (Rear view)

Main

Index

Group

TOC

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-201

Step 2. Voltage measurement at the B-133 
ETACS-ECU connector.

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

junction block side.

(2) Ignition switch: ACC position

(3) Voltage between B-133 ETACS-ECU connector 

terminal No.74 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-133 
ETACS-ECU connector terminal No.74 to the 
ignition switch (ACC).

NOTE: Prior to the wiring harness inspection, check 
junction block connector B-129 and B-131, 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 4. Retest the system.
Check that the ignition switch (ACC) signal 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.

AC313826AC

B-133 (GR)

Connector: B-133

Harness side

Junction block (Rear view)

AC310507 ES

5251

69

60

53

54

71

636261

70

56

65

58

73

67

57

66

72

64

55

59

68

74

Connector B-133 
(Harness side)

AC313827AB

B-131

B-131

B-129

B-133 (GR)

B-133

B-129

Connectors: B-129, B-131, B-133

Junction block (Rear view)

Harness side

Harness side

Harness side

Main

Index

Group

TOC

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-202

INSPECTION PROCEDURE N-2: The ignition switch (IG1) signal 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 ignition switch (IG1) is used to 
operate the functions below. If the signal is abnormal, 
these functions will not work normally.

• Lamp reminder buzzer

• Power window

• Power window timer

• Electric retractable remote controlled door mirror

• Ignition key cylinder illumination lamp

• Turn signal lamp

• Room lamp

POSSIBLE CAUSES

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS 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.

Ignition Switch (IG1) Input 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

IGNITION
SWITCH (IG1)

AC313826AC

B-133 (GR)

Connector: B-133

Harness side

Junction block (Rear view)

Main

Index

Group

TOC

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-203

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

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

junction block side.

(2) Ignition switch: ON position

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

terminal No.68 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.68 to the 
ignition switch (IG1).

NOTE: 

Prior to the wiring harness inspection, check joint 
connector B-22 and junction block connector B-129 
and B-131, 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.

AC313826AC

B-133 (GR)

Connector: B-133

Harness side

Junction block (Rear view)

AC310507 ET

Connector B-133 
(Harness side)

AC313827AB

B-131

B-131

B-129

B-133 (GR)

B-133

B-129

Connectors: B-129, B-131, B-133

Junction block (Rear view)

Harness side

Harness side

Harness side

AC401055

Connector: B-22

AD

Main

Index

Group

TOC