Mitsubishi Lancer Evolution IX. Manual — part 250
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-259
DIAGNOSIS 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) Ignition switch: ACC position
(3) Voltage between C-226 ETACS-ECU connector
terminal No.18 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
AB
Junction block side
Junction block (rear view)
<LHD>
AC310461
Junction block (rear view)
Connector: C-226
AB
<RHD>
Junction block side
AC310450
Connector: C-226
AB
Junction block side
Junction block (rear view)
<LHD>
AC310461
Junction block (rear view)
Connector: C-226
AB
<RHD>
Junction block side
AC301541GT
Connector C-226
(Junction block side)
2019
7
13
17
18
1615 14
10
11
12
9 8
2
6 5
3
4
1
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-260
Step 3. Check the wiring harness between C-226
ETACS-ECU connector terminal No.18 and the
ignition switch (ACC).
NOTE:
Prior to the wiring harness inspection, check junction
block connector C-211, 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
Cope with Intermittent Malfunction
NO :
Repair the wiring harness.
Step 4. SWS monitor data list.
<Selected item> ETACS ECU
• Ignition switch: ACC
OK: Normal condition is displayed.
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.
AC310450
Connector: C-226
AB
Junction block side
Junction block (rear view)
<LHD>
AC310461
Junction block (rear view)
Connector: C-226
AB
<RHD>
Junction block side
AC310448
Harness side
Junction block (front view)
Connector: C-211
AB
<LHD>
4
6 5
3
2
1
AC310458
Harness side
Junction block (front view)
Connector: C-211
AB
<RHD>
Item No.
Item name
Normal
condition
Item 31
IG SW(ACC)
ON
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-261
INSPECTION PROCEDURE L-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 function
• Headlamp automatic shutdown function
• Turn signal lamp
• Room lamps
POSSIBLE CAUSES
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSIS 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.
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)
J/B SIDE
Ignition Switch (IG1) Input Circuit
AC310450
Connector: C-226
AB
Junction block side
Junction block (rear view)
<LHD>
AC310461
Junction block (rear view)
Connector: C-226
AB
<RHD>
Junction block side
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-262
Step 2. Voltage measurement at the C-226
ETACS-ECU connector
(1) Remove the ETACS-ECU, and measure at the
junction block side.
(2) Ignition switch: ON position
(3) Voltage between C-226 ETACS-ECU connector
terminal No.8 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 C-226
ETACS-ECU connector terminal No.8 and the
ignition switch (IG1).
NOTE:
Prior to the wiring harness inspection, check junction
block connector C-211, and repair if necessary.
• Check the power supply line for open circuit.
AC310450
Connector: C-226
AB
Junction block side
Junction block (rear view)
<LHD>
AC310461
Junction block (rear view)
Connector: C-226
AB
<RHD>
Junction block side
AC301541GU
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
AB
Junction block side
Junction block (rear view)
<LHD>
AC310461
Junction block (rear view)
Connector: C-226
AB
<RHD>
Junction block side
AC310448
Harness side
Junction block (front view)
Connector: C-211
AB
<LHD>
4
6 5
3
2
1
AC310458
Harness side
Junction block (front view)
Connector: C-211
AB
<RHD>
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