Mitsubishi Lancer Evolution IX. Manual — part 120
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-43
DIAGNOSTIC PROCEDURE
Step 1. Connector check: C-226 ETACS-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the defective connector.
Step 2. Voltage measurement at the C-226
ETACS-ECU connector
(1) Remove the ETACS-ECU, and measure at the
junction block side.
(2) Voltage between C-226 ETACS-ECU connector
terminal No.20 and body earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Go to Step 3.
AC310450
Connector: C-226 <LHD>
AB
Junction block side
Junction block (rear view)
AC310461
Connector: C-226 <RHD>
AE
Junction block side
Junction block
(rear view)
AC310450
Connector: C-226 <LHD>
AB
Junction block side
Junction block (rear view)
AC310461
Connector: C-226 <RHD>
AE
Junction block side
Junction block
(rear view)
AC310507AB
Connector C-226
(Junction block side)
2019
7
13
17
18
1615 14
10
11
12
9 8
2
6 5
3
4
1
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-44
Step 3. Check the wiring harness between C-226
ETACS-ECU connector terminal No.20 and
battery.
NOTE:
Prior to the wiring harness inspection, check joint
connector C-05, intermediate connector C-129 and
junction block connector C-210, and repair if neces-
sary.
• 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
NO :
Repair the wiring harness.
AC310450
Connector: C-226 <LHD>
AB
Junction block side
Junction block (rear view)
AC310461
Connector: C-226 <RHD>
AE
Junction block side
Junction block
(rear view)
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
AC310448
Harness side
Junction block (front view)
Connector: C-210 <LHD>
AD
10
1
6
14
5
12
13
4
11
7
2
3
8
9
AC310458
Harness side
Junction block (front view)
Connector: C-210 <RHD>
AD
10
1
6
14
5
12
13
4
11
7
2
3
8
9
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-45
Step 4. Resistance measurement at the C-226
ETACS-ECU connector
(1) Remove the ETACS-ECU, and measure at the
junction block side.
(2) Continuity between C-226 ETACS-ECU
connector terminal No.3 and body earth.
OK: 2
Ω or less
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Go to Step 5.
Step 5. Check the wiring harness between C-226
ETACS-ECU connector terminal No.3 and body
earth.
NOTE:
Prior to the wiring harness inspection, check junction
block connector C-214, and repair if necessary.
• Check the earth wires for open circuit.
AC310450
Connector: C-226 <LHD>
AB
Junction block side
Junction block (rear view)
AC310461
Connector: C-226 <RHD>
AE
Junction block side
Junction block
(rear view)
AC310506AC
Connector C-226
(Junction block side)
2019
7
13
17
18
1615 14
10
11
12
9 8
2
6 5
3
4
1
AC310450
Connector: C-226 <LHD>
AB
Junction block side
Junction block (rear view)
AC310461
Connector: C-226 <RHD>
AE
Junction block side
Junction block
(rear view)
AC310448
Harness side
Junction block (front view)
Connector: C-214 <LHD>
AE
21
7
16 15
17
18
20 19
1
2
3
4
5
6
23 22
24
25
28
26
27
9
8
10
11
14
12
13
AC310458
Harness side
Junction block (front view)
Connector: C-214 <RHD>
AE
21
7
16 15
17
18
20 19
1
2
3
4
5
6
23 22
24
25
28
26
27
9
8
10
11
14
12
13
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-46
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
Cope with Intermittent Malfunction
NO :
Repair the wiring harness.
Step 6. Retest the system.
Check that the battery power supply circuit to the
ETACS-ECU is normal.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
Cope with Intermittent Malfunction
NO :
Replace the ETACS-ECU.
BUZZER
INSPECTION PROCEDURE B-1: Lamp reminder buzzer function does not work normally.
CAUTION
Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.
COMMENTS ON TROUBLE SYMPTOM
The ETACS-ECU operates this function in accord-
ance with the input signals below.
• Ignition switch (IG1)
• Driver's door switch
• Tail lamp switch
• Headlamp switch
If this function does not work normally, these input
signal circuit(s) or the ETACS-ECU may be defec-
tive.
POSSIBLE CAUSES
• Malfunction of the driver's door switch
• Malfunction of the column switch
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSTIC PROCEDURE
Step 1. Check the power supply circuit.
When the ignition switch is turned to the LOCK
(OFF) position, check if the hazard warning lamps
illuminate.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Refer to inspection procedure A-2 "Check
the battery power supply circuit to the
ETACS-ECU
ETACS-ECU
INPUT SIGNAL
· FRONT DOOR SWITCH (RH) <RHD>
· FRONT DOOR SWITCH (LH) <LHD>
· HEADLAMP SWITCH
· IGNITION SWITCH (IG1)
· TAIL LAMP SWITCH
Lamp Reminder Tone Alarm Function
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