Mitsubishi Grandis. Manual — part 159
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-98
Step 10. Check the wiring harness between E-07
sunroof motor assembly connector terminal
No.10 and C-221 ETACS-ECU connector terminal
No.59.
NOTE: Prior to the wiring harness inspection, check
joint connector C-01 and intermediate connector
C-128, and repair if necessary.
• Check the communication lines for open circuit.
Q: Is the check result normal?
YES :
Go to Step 11.
NO :
Repair the wiring harness.
AC310651
AB
Connector: E-07 <LHD>
Harness side
AC310655
AC
Connector: E-07 <RHD>
Harness side
AC310626
Connector: C-221
Junction block (Rear view)
<LHD>
AC
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
Harness side
C-221(GR)
AC310620
Connector: C-221
Junction block
(Rear view)
<RHD>
AC
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
Harness side
C-221(GR)
AC310614
AX
Connectors: C-01, C-128 <LHD>
C-128
C-128
C-01
C-01
AC310632AQ
Connectors: C-01, C-128 <RHD>
C-01
C-128
C-01
C-128
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-99
Step 11. ECU check on the SWS monitor
Check that the power supply and earth lines to the
sunroof motor assembly and the SWS
communication lines are normal.
• Turn the ignition switch to the ON position.
ECUS TO BE CHECKED
• SUNROOF ECU
OK: "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 :
Replace the sunroof motor assembly.
TONE ALARM
Inspection Procedure B-1: Lamp reminder buzzer 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
The ETACS-ECU operates this function in
accordance with the input signals below.
• Ignition switch (IG1)
• Driver's door switch
• Tail lamp switch
If this function does not work normally, these input
signal circuit(s) or the ETACS-ECU may be
defective.
POSSIBLE CAUSES
• Malfunction of the driver's door switch
• Malfunction of the column switch
• Malfunction of the ETACS-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
ETACS-ECU and the column switch (column-ECU)
and the SWS communication lines are normal.
• Ignition switch: OFF
ECUS TO BE CHECKED
• ETACS ECU
• COLUMN ECU
OK: "OK" are displayed for all the items
Q: Are the check result normal?
ETACS-ECU
INPUT SIGNAL
· DRIVER'S DOOR SWITCH
· TAIL LAMP SWITCH
· IGNITION SWITCH (IG1)
· HEADLAMP SWITCH
Lamp Reminder Buzzer Function
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-100
"OK" is displayed for all the items :
Go to Step 2.
"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 "COLUMN ECU" menu. :
Refer to Inspection Procedure A-2
"Communication with the column switch
(column-ECU) is not possible
Step 2. Function diagnosis by using the SWS
monitor
Check the SWS communication signal, which are
related to the lamp reminder function.
<Selected item> BUZZER - LGT MONI. ALRM
• Ignition switch: OFF (key removed)
• lighting switch: HEAD
• Driver's door: open
OK: Normal conditions are displayed for all
the items.
Q: Are the check result normal?
Normal conditions are displayed for all the items :
Go to Step 3.
Normal condition is not displayed for item No.00 or
No.01 :
Refer to inspection procedure Q-6 "The
column switch (lighting and turn-signal lamp
switch and headlamp washer switch) signal
is not received
."
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.32 :
Refer to inspection procedure Q-5 "The
driver's door switch signal is not received
<LH drive vehicles> or
<RH drive vehicles>."
Normal condition is not displayed for item No.43 :
Replace the ETACS-ECU.
Step 3. Retest the system.
The lamp reminder buzzer function should 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 ETACS-ECU.
Item No. Item name
Normal condition
Item 00
HEADLAMP SW ON when the lighting
switch is at HEAD
Item 01
TAIL LAMP SW ON when the lighting
switch is at TAIL
Item 30
IG SW(IG1)
OFF
Item 32
DR DOOR SW
ON
Item 43
BUZZER
ON
SYMPTOM PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-101
Inspection Procedure B-2: Seat belt warning buzzer 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 function does not work normally, the input
circuit system from the switches or the ETACS-ECU
may be defective (refer to "CIRCUIT OPERATION").
POSSIBLE CAUSES
• Malfunction of the ETACS-ECU
• Malfunction of the driver's seat belt switch
• Malfunction of the passenger's seat belt switch
• Damaged harness wires and connectors
DIAGNOSTIC PROCEDURE
Step 1. 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.
• Turn the ignition switch to the ON position.
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 2.
NO :
Refer to Inspection Procedure A-3
"Communication with the ETACS-ECU is
not possible
Step 2. ETACS switch data by using the SWS
monitor
Check the ETACS-ECU signal related to the seat belt
warning buzzer function.
• Ignition switch: ON
• Driver's seat belt switch: ON (Unfastened)
• Passenger’s seat belt switch: ON (Unfastened)
• Seat occupancy sensor: ON (Seat occupied)
OK: Normal conditions are displayed for all
the items.
Q: Are the check result normal?
Seat Belt Warning Buzzer Function
ETACS-
ECU
· SPEED SIGNAL
· DRIVER'S SEAT BELT SWITCH
COMBINATION
METER
CAN COMMUNICATION LINE
(CAN_L LINE)
CAN COMMUNICATION LINE
(CAN_H LINE)
INPUT SIGNAL
INPUT SIGNAL
· IGNITION SWITCH (IG1)
· PASSENGER'S SEAT BELT SWITCH
Item No.
Item name
Normal
condition
Item 12
SEAT BELT SW
ON
Item 30
IG SW(IG1)
ON
Item 43
As.SeatBeltSW
ON
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