Mitsubishi Lancer Evolution IX. Manual — part 221
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-143
COMMENTS ON TROUBLE SYMPTOM
The windshield wiper motor, the column switch or the
front-ECU may be defective. If a problem is found in
the ECU check by using the SWS monitor, also
check the wiper backup circuit (between C-203 col-
umn switch connector terminal No.8 and A-11X
front-ECU connector terminal No.26) and repair if
necessary.
POSSIBLE CAUSES
• Malfunction of the windshield wiper motor
• Malfunction of the column switch
• Malfunction of the front-ECU
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. ECU check on the SWS monitor
Check that the power supply and earth lines to the
column switch (column-ECU) and the front-ECU and
the SWS communication lines are normal.
• Turn the ignition switch to the ON position.
ECUS TO BE CHECKED
• COLUMN ECU
• FRONT ECU
OK: "OK" is displayed for all the items
Q: Is the check result normal?
"OK" is displayed for all the items :
Go to Step 2.
"NG" is displayed on the "COLUMN ECU" menu. :
Refer to Inspection Procedure A-2
"Communication with the column switch
(column-ECU) is not possible
."
"NG" is displayed on the "FRONT ECU" menu. :
Refer to Inspection Procedure A-4
"Communication with the front-ECU is not
possible
."
Step 2. Function diagnosis by using the SWS
monitor
Check the SWS communication signal, which are
related to the windshield wiper function.
<Selected item> F.WIPER INT
• Turn the ignition switch to the ACC position.
• Windshield wiper switch: INT
OK: Normal conditions are displayed for all
the items.
Q: Is the check result normal?
Normal conditions displayed for all the items :
Go
to Step 3.
Normal condition is not displayed for item No.05 :
Replace the column switch.
Normal condition is not displayed for item No.31 :
Refer to Inspection Procedure L-1 "The
ignition switch (ACC) signal is not received
."
Normal condition is not displayed for item No.70 :
Replace the front-ECU.
Item No. Item name
Normal condition
Item 05
INT WIPER SW
ON
Item 31
IGNITION SW
ACC
ON
Item 70
FRONT ECU ACK NORMAL ACK or
HI-BEAM ACK
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-144
Step 3. Connector check: B-01 windshield wiper
motor connector
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Repair the connector.
Step 4. Check the windshield wiper motor
assembly.
Refer to GROUP 51
− Windshield wiper
.
Q: Is the check result normal?
YES :
Go to Step 5
NO :
Replace the windshield wiper motor
assembly.
Step 5. Resistance measurement at the B-01
windshield wiper motor connector
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Continuity between B-01 windshield wiper motor
connector terminal No.5 and body earth
OK: 2
Ω or less
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Go to Step 6.
AC310437
Connector: B-01 <LHD>
AB
Harness side
B-01 (GR)
AC310477
Connector: B-01 <RHD>
AD
Harness side
B-01 (GR)
AC310437
Connector: B-01 <LHD>
AB
Harness side
B-01 (GR)
AC310477
Connector: B-01 <RHD>
AD
Harness side
B-01 (GR)
4
1
2
5
3
AC301635
Connector B-01
(Harness side)
AC
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-145
Step 6. Check the wiring harness between B-01
windshield wiper motor connector terminal No.5
and body earth.
• Check the earth wires 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 7. Connector check: A-11X front-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 8.
NO :
Repair the connector.
Step 8. Voltage measurement at the A-11X
front-ECU connector
(1) Remove the front-ECU, and measure at the relay
box side.
(2) Ignition switch: ACC
(3) Check the voltage between the A-11X front-ECU
connector terminal No.24 and body earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 10.
NO :
Go to Step 9.
AC310437
Connector: B-01 <LHD>
AB
Harness side
B-01 (GR)
AC310477
Connector: B-01 <RHD>
AD
Harness side
B-01 (GR)
AC310572AC
Connector: A-11X
Relay box side
Battery
29
31 30
28 27
25
26
24
21
22
23
AC310572AC
Connector: A-11X
Relay box side
Battery
29
31 30
28 27
25
26
24
21
22
23
24
29
30
31
2827
25
26
21
2322
AC304768
Connector A-11X
(Relay box side)
AB
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-146
Step 9. Check the wiring harness between A-11X
front-ECU connector terminal No.24 and the
ignition switch (ACC).
NOTE:
Prior to the wiring harness inspection, check the
junction block connectors C-210, C-211 and interme-
diate connector C-129 and repair if necessary.
• Check the power supply line to the ignition switch
(ACC) 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.
AC310572AC
Connector: A-11X
Relay box side
Battery
29
31 30
28 27
25
26
24
21
22
23
AC310449
Connectors: C-210, C-211 <LHD>
AF
C-210
C-211
Junction block (front view)
C-210
Harness side
10
1
6
14
5
12
13
4
11
7
2
3
8
9
C-211
Harness side
4
6 5
3
2
1
AC310459
Connectors: C-210, C-211 <RHD>
AF
C-210
C-211
Junction block (front view)
C-210
Harness side
10
1
6
14
5
12
13
4
11
7
2
3
8
9
C-211
Harness side
4
6 5
3
2
1
AC310446
Connector: C-129 <LHD>
AS
AC310454
Connector: C-129 <RHD>
AV
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