Mitsubishi Grandis. Manual — part 189
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-218
Step 6. Check the wiring harness between A-15X
front-ECU connector terminal No.27 and A-01
windshield wiper motor connector terminal No.1.
• Check the output lines for open circuit.
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Repair the wiring harness.
Step 7. Retest the system.
Check that the windshield wipers work normally by
moving the switch to each position.
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 front-ECU.
Step 8. Connector check: A-15X front-ECU
connector.
Q: Is the check result normal?
YES :
Go to Step 9.
NO :
Repair the defective connector.
AC310401
Connector: A-01 <LHD>
Harness side
AD
A-01 (GR)
AC310396
Connector: A-01 <RHD>
Harness side
AD
A-01 (GR)
AC311521AC
Connector: A-15X
Relay box side
21
22
23
24
25
26
27
28
29
30
31
AC311521AC
Connector: A-15X
Relay box side
21
22
23
24
25
26
27
28
29
30
31
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-219
Step 9. Check the wiring harness between A-15X
front-ECU connector terminal No.28 and A-01
windshield wiper motor connector terminal No.4.
• Check the output lines for open circuit.
Q: Is the check result normal?
YES :
Go to Step 10.
NO :
Repair the wiring harness.
Step 10. Retest the system.
Check that the windshield wipers work normally by
moving the switch to each position.
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 front-ECU.
AC310401
Connector: A-01 <LHD>
Harness side
AD
A-01 (GR)
AC310396
Connector: A-01 <RHD>
Harness side
AD
A-01 (GR)
AC311521AC
Connector: A-15X
Relay box side
21
22
23
24
25
26
27
28
29
30
31
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-220
Inspection Procedure G-5: The intermittent wiper interval can not be adjusted by operating the
windshield intermittent wiper volume control.
CAUTION
Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.
COMMENTS ON TROUBLE SYMPTOM
The column switch or the front-ECU may be
defective.
POSSIBLE CAUSES
• Malfunction of the column switch
• Malfunction of the front-ECU
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. SWS monitor data list
• Rotate the windshield intermittent wiper volume
when the vehicle is stopped.
NOTE: Also check that the windshield wiper interval
changes smoothly when the windshield
intermittent wiper interval adjusting knob is
rotated from "SLOW" to "FAST" positions.
OK: Normal condition is displayed.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Refer to Inspection Procedure Q-8 "The
intermittent wiper volume signal is not
received
Step 2. Retest the system.
Check that the windshield intermittent wiper interval
can be adjusted by operating the windshield
intermittent wiper volume control.
OK: The intermittent wiper interval is
changed as the intermittent wiper volume is
rotated.
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 front-ECU.
WINDSHIELD WIPER
INTERMITTENT VOLUME
INPUT SIGNAL
ETACS-ECU
Windshield Wiper Intermittent Volume Input Signal
Item No.
Item name
Normal condition
Item 37
INT WIPER TIME
4.6
− 32.0 s
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-221
Inspection Procedure G-6: The intermittent wiper interval is not changed according to the vehicle
speed.
CAUTION
Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.
COMMENTS ON TROUBLE SYMPTOM
The ETACS-ECU calculates the intermittent wiper
interval according to the vehicle speed signal which
is sent by the engine-ECU <M/T> or engine-A/T-ECU
<A/T>.
If the intermittent wiper interval does not depend on
the vehicle speed, the input circuit of the vehicle
speed signal and the ETACS-ECU may be defective.
POSSIBLE CAUSES
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. Check the operation by operating the
intermittent wiper volume.
Check that the windshield intermittent wiper interval
can be adjusted by operating the windshield
intermittent wiper volume control.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Refer to Inspection Procedure G-5 "The
intermittent wiper interval can not be
adjusted by operating the windshield
intermittent wiper volume control
Step 2. Check the SWS monitor customized
function.
Use the SWS monitor customize function to confirm
that "SPEED SEN WIP" is set to "W.FUNCTION".
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Use the SWS monitor customize function to
set the "SPEED SEN WIP" to
"W.FUNCTION" (Refer to
).
Step 3. ECU check by using the SWS monitor.
Check that the power supply and earth lines to the
ETACS-ECU and the SWS communication lines are
normal.
• Ignition switch: ON
ECU TO BE CHECKED
• ETACS ECU
OK: "OK" is displayed on the "ETACS-ECU"
menu.
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Refer to Inspection Procedure A-3
"Communication with the ETACS-ECU is
not possible
INPUT SIGNAL
INPUT SIGNAL
VEHICLE SPEED
COMBINATION
METER
VARIABLE INTERMITTENT WIPER
CONTROL SWITCH
ETACS-ECU
CAN COMMUNICATION LINE
(CAN_L LINE)
CAN COMMUNICATION LINE
(CAN_H LINE)
Variable Intermittent Wiper Control Circuit
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