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
).
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
).
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
).
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
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