Mitsubishi Lancer Evolution IX. Manual — part 170
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-243
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>
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-244
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. Retest the system.
Check that the ignition switch (IG1) signal is received
normally.
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.
INSPECTION PROCEDURE L-3: The door switch (front: LH) signal is not received. <LH drive
vehicles>
CAUTION
Whenever the ECU is replaced, ensure that the
input signal circuit is normal.
COMMENTS ON TROUBLE SYMPTOM
Input signal from the door switch (front: LH) is used
to operate the functions below. If the signal is abnor-
mal, these functions will not work normally.
• Lamp reminder function
• Headlamp automatic shutdown function
• Room lamps
POSSIBLE CAUSES
• Malfunction of the door switch (front: LH)
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSTIC PROCEDURE
Step 1. Check the installation condition.
Check that the door switch (front: LH) is installed on
the body correctly.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Correct the installation condition.
J/B SIDE
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
FRONT DOOR
SWITCH (LH)
Door Switch Input Circuit <LHD>
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-245
Step 2. Connector check: D-18 door switch (front:
LH) connector
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Repair the defective connector.
Step 3. Check the door switch (front: LH).
Refer to GROUP 42
− Door
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Replace the door switch (front: LH).
Step 4. Connector check: C-226 ETACS-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Repair the defective connector.
Step 5. Check the wiring harness between D-18
door switch (front: LH) connector terminal No.3
and C-226 ETACS-ECU connector terminal No.10.
NOTE:
Prior to the wiring harness inspection, check joint
connector C-217, and repair if necessary.
• Check the input line for open circuit.
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Repair the wiring harness.
Step 6. Retest the system.
Check that the door switch (front: LH) signal is
received normally.
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.
AC310465
Harness side
AB
Connector: D-18
<LHD>
AC310450
Connector: C-226
AB
Junction block side
Junction block (rear view)
<LHD>
AC310450
Connector: C-226
AB
Junction block side
Junction block (rear view)
<LHD>
AC310465
Harness side
AB
Connector: D-18
<LHD>
AC310448
Harness side
Junction block (front view)
Connector: C-217
AC
<LHD>
INPUT SIGNAL PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-246
INSPECTION PROCEDURE L-3: The door switch (front: RH) signal is not received. <RH drive
vehicles>
CAUTION
Whenever the ECU is replaced, ensure that the
input signal circuit is normal.
COMMENTS ON TROUBLE SYMPTOM
Input signal from the door switch (front: RH) is used
to operate the functions below. If the signal is abnor-
mal, these functions will not work normally.
• Lamp reminder function
• Headlamp automatic shutdown function
• Room lamps
POSSIBLE CAUSES
• Malfunction of the door switch (front: RH)
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSTIC PROCEDURE
Step 1. Check the installation condition.
Check that the door switch (front: RH) is installed on
the body correctly.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Correct the installation condition.
Step 2. Connector check: D-01 door switch (front:
RH) connector
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Repair the defective connector.
Step 3. Check the door switch (front: RH).
Refer to GROUP 42
− Door
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Replace the door switch (front: RH).
J/B SIDE
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
DOOR SWITCH
(RH)
Door Switch Input Circuit <RHD>
AC310471
Harness side
AB
Connector: D-01
<RHD>
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