Mitsubishi Grandis. Manual — part 184
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-198
DIAGNOSTIC PROCEDURE
Step 1. Check the SWS monitor customized
function.
Use the SWS monitor customize function to confirm
that "KEY-OFF TMR T" is set to "W/O FUNCTION".
• 30s
• 3min.
• 10min.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Use the SWS monitor customize function to
set the "KEY-OFF TMR T" to "W/O
FUNCTION" (Refer to
Step 2. ECU check on the SWS monitor.
Check that the power supply and earth lines to the
sunroof motor assembly (sunroof-ECU) and the
ETACS-ECU and the SWS communication lines are
normal.
• Ignition switch: OFF
• Operate the sunroof switch.
NOTE: Operate within the period set by using the
customisation function after the ignition switch is
turned off.
ECUS TO BE CHECKED
• ETACS ECU
• SUNROOF ECU
OK: "OK" are displayed for all the items
Q: Are the check result normal?
"OK" are displayed for all the items :
Go to Step 3.
"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 "SUNROOF ECU" menu. :
Refer to Inspection Procedure A-6
"Communication with the sunroof motor
assembly (sunroof-ECU) is not possible
."
Step 3. Function diagnosis by using the SWS
monitor.
Check the SWS communication signal, which are
related to the sunroof.
<Selected item> SUNROOF OPE
• Ignition switch: ON
OK: Normal condition is displayed.
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Replace the sunroof motor assembly.
Step 4. SWS monitor data list.
Check the SWS communication signal, which are
related to the sunroof timer function.
<Selected item> ETACS-ECU
• Driver’s door switch: CLOSE to OPEN
OK: Normal condition is displayed.
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Refer to inspection procedure Q-5 "The
driver's door switch signal is not received
<LH drive vehicles>
drive vehicles>
Step 5. Retest the system.
Check that the sunroof timer 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 conditions
Item 72
S/R ECU ACK INPUT CHECK (only
momentarily when
switch is operated)
Item No.
Item name
Normal conditions
Item 32
DR DOOR SW From OFF to ON
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-199
Inspection Procedure F-4: The sunroof inhibition function does not work normally (The sunroof
operation lock warning buzzer does not sound).
CAUTION
Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.
SUNROOF MOTOR
ASSEMBLY
CPU
ETACS-
ECU
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
Sunroof Lock Function <LHD>
POWER
WINDOW
MAIN
SWITCH
(LOCK SWITCH)
CPU
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-200
COMMENTS ON TROUBLE SYMPTOM
If the sunroof inhibition function does not work
normally, the communication circuit, the power
window lock switch input circuit, the sunroof motor
assembly or the ETACS-ECU may be defective.
POSSIBLE CAUSES
• Malfunction of the power window main switch
• Malfunction of the sunroof motor assembly
(sunroof ECU)
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
Step 1. Which does not operate normally, the
sunroof inhibition or the sunroof operation lock
buzzer?
Q: Which does not operate normally, the sunroof
inhibition or the sunroof operation lock buzzer?
The sunroof inhibition does not work normally. :
Go to Step 2.
The sunroof operation lock buzzer does not work
normally. :
Go to Step 4.
Neither operates normally. :
Go to Step 6.
Step 2. Check the operation condition of the
sunroof.
Check that the sunroof works normally.
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Refer to Inspection Procedure F-1 "The
sunroof does not work at all
SUNROOF MOTOR
ASSEMBLY
CPU
ETACS-
ECU
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
Sunroof Lock Function <RHD>
POWER
WINDOW
MAIN
SWITCH
(LOCK SWITCH)
CPU
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-201
Step 3. ECU check by using the SWS monitor.
Check that the power supply and earth lines to the
ETACS-ECU and the sunroof motor assembly
(incorporating sunroof-ECU) and the SWS
communication lines are normal.
• Ignition switch: ON
• Operate the sunroof switch.
ECUS TO BE CHECKED
• Sunroof ECU
"OK" is displayed on the "SUNROOF ECU"
menu.
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 :
Refer to Inspection Procedure A-6
"Communication with the sunroof motor
assembly (sunroof-ECU) is not possible
."
Step 4. ECU check on the SWS monitor
Check that the power supply and earth lines to the
ETACS-ECU the SWS communication lines is
normal.
• Ignition switch: ON
ECUS TO BE CHECKED
• ETACS ECU
OK: "OK" is displayed on the "ETACS ECU"
menu.
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Refer to Inspection Procedure A-3
"Communication with the ETACS-ECU is
not possible
Step 5. SWS monitor data list
Check the SWS communication signal, which are
related to the sunroof operation lock buzzer.
<Selected item> S/R- REAR S/R LOCK
• Ignition switch: ON
• Power window lock switch :ON
• Operate the sunroof switch
OK: Normal conditions is displayed.
Q: Is the check result normal?
NO :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
Cope with Intermittent Malfunction
NO :
Replace the ETACS.
Step 6. ECU check by using the SWS monitor
Check that the power supply and earth lines to the
ETACS-ECU, the sunroof motor assembly
(incorporating sunroof-ECU) and the power window
main switch (power window module), and the SWS
communication lines are normal.
• Ignition switch: ON
• Operate the sunroof switch.
ECUS TO BE CHECKED
• ETACS ECU
• P/W MODULE
• Sunroof ECU
OK: Normal conditions are displayed for all
the items.
Q: Are the check result normal?
Item No.
Item name
Normal
condition
s
Item 30
IG SW(IG1)
ON
Item 43
BUZZER
ON
Item 72
S/R ECU ACK
BUZZER
ACK
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