Mitsubishi Grandis. Manual — part 185
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-202
"OK" are displayed for all the items :
Go to Step 7.
"NG" is displayed on the "ETACS ECU" menu. :
Refer to Inspection Procedure A-3
"Communication with the ETACS-ECU is
not possible
"NG" is displayed on the "P/W MODULE" menu. :
Refer to Inspection Procedure A-5
"Communication with the power window
main switch (power window module) is not
possible
"NG" is displayed on the "SUNROOF ECU" menu. :
Refer to Inspection Procedure A-6
"Communication with the sunroof motor
assembly (sunroof-ECU) is not possible
."
Step 7. SWS monitor data list.
Check the SWS communication signal, which are
related to the sunroof inhibition function.
<Selected item> S/R- REAR S/R LOCK
• Ignition switch: ON
• Power window lock switch :ON
• Operate the sunroof switch
OK: Normal conditions are displayed for all
the items.
Q: Are the check result normal?
Normal conditions are displayed for all the items :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
Cope with Intermittent Malfunction
Normal condition is not displayed for item No.30 :
Refer to inspection procedure Q-2 "The
ignition switch (IG1) signal is not received
."
Normal condition is not displayed for item No.43 :
Replace the ETACS.
Normal condition is not displayed for item No.71 :
Replace the power window main switch.
Normal condition is not displayed for item No.72 :
Replace the sunroof motor assembly.
Inspection Procedure F-5: Sunroof anti-trap 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
If the sunroof anti-trap function does not work, the
sunroof motor assembly (sunroof-ECU) may be
defective.
POSSIBLE CAUSES
• Malfunction of the sunroof motor assembly
(sunroof-ECU)
DIAGNOSTIC PROCEDURE
Retest the system.
Check that the sunroof anti-trap function work
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 sunroof motor assembly.
Item No.
Item name
Normal
condition
s
Item 30
IG SW(IG1)
ON
Item 43
BUZZER
ON
Item 71
P/W ECU ACK
P/W
LOCK
ACK
Item 72
S/R ECU ACK
BUZZER
ACK
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-203
WINDSHIELD WIPER AND WASHER
Inspection Procedure G-1: The windshield wipers does not work at all.
CAUTION
Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.
Windshield Wiper Power Supply Circuit
FRONT-ECU
WINDSHIELD
WIPER MOTOR
WIPER SPEED
SWITCHING
RELAY
CIRCUIT
BREAKER
IGNITION
SWITCH (ACC)
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
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-204
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-301
column switch connector terminal No.8 and A-15X
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 by using 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" are displayed for all the items
Q: Are 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: Are 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 Q-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-205
Step 3. Connector check: A-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 A-01
windshield wiper motor connector.
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Continuity between A-01 windshield wiper motor
connector terminal No.2, and body earth
OK: 2
Ω or less
Q: Is the check result normal?
YES :
Go to Step 8.
NO :
Go to Step 6.
AC310401
Connector: A-01 <LHD>
Harness side
AD
A-01 (GR)
AC310396
Connector: A-01 <RHD>
Harness side
AD
A-01 (GR)
AC310401
Connector: A-01 <LHD>
Harness side
AD
A-01 (GR)
AC310396
Connector: A-01 <RHD>
Harness side
AD
A-01 (GR)
AC310506
4
1
2
5
3
Connector A-01
(Harness side)
BN
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