Mitsubishi Grandis. Manual — part 145
DIAGNOSTIC TROUBLE CODE PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-42
POSSIBLE CAUSES
• Malfunction of the combination meter
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. MUT-III CAN bus diagnostics
Use the MUT-III to diagnose the CAN bus lines.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the CAN bus line (Refer to GROUP
54D
− Diagnosis
go to Step 6.
Step 2. MUT-III diagnosis code
Check whether the combination meter-related
diagnosis code is set.
Q: Is the diagnosis code set?
YES :
Diagnose the combination meter (Refer to
GROUP 54A
− Troubleshooting
NO :
Go to Step 3.
Step 3. MUT-III diagnosis code
Check if a diagnosis code, which relates to CAN
communication-linked systems below, is set.
• Engine
U1108: Combination meter time-out diagnosis code
Q: Is the diagnosis code set?
YES :
Go to Step 4.
NO :
Go to Step 5.
Step 4. Check whether the diagnosis code is
reset.
Check again if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Ignition switch: LOCK (OFF) position to ON
(3) On completion, check that the diagnosis code is
not reset.
Q: Is the check result normal?
YES :
A poor connection, open circuit or other
intermittent malfunction is present in the
CAN bus lines between the combination
meter and the ETACS-ECU (Refer to
GROUP 00
− How to Use
Troubleshooting/Inspection Service Points
).
NO :
Replace the combination meter, and then go
to Step 6.
Step 5. Check whether the diagnosis code is
reset.
Check again if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Ignition switch: LOCK (OFF) position to ON
(3) On completion, check that the diagnosis code is
not reset.
Q: Is the check result normal?
YES :
A poor connection, open circuit or other
intermittent malfunction is present in the
CAN bus lines between the combination
meter and the ETACS-ECU (Refer to
GROUP 00
− How to Use
Troubleshooting/Inspection Service Points
).
NO :
Replace the ETACS-ECU, and then go to
Step 6.
Step 6. Check whether the diagnosis code is
reset.
Recheck if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Ignition switch: LOCK (OFF) position to ON
(3) On completion, check that the diagnosis code is
not reset.
Q: Is the check result normal?
YES :
The procedure is complete.
NO :
Return to Step 1.
Diagnosis code No.21 Meter failure information
CAUTION
If diagnosis code No.21 is set in the ETACS-ECU,
diagnose the CAN bus lines.
CAUTION
Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.
TROUBLE JUDGMENT
The ETACS-ECU receives vehicle speed-related
signal from the combination meter via the CAN bus
lines. If failure information is sent to the vehicle
speed-related signal, diagnosis code No.21 will be
set.
DIAGNOSTIC TROUBLE CODE PROCEDURES
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-43
COMMENT ON TROUBLE SYMPTOM
Current trouble
• Connector(s) or wiring harness in the CAN bus
lines, the engine-A/T-ECU <A/T> or the
engine-ECU <M/T>, the combination meter, the
ETACS-ECU or the output shaft speed sensor
may be defective.
Past trouble
• If diagnosis code No.21 is stored as a past
trouble, carry out diagnosis with particular
emphasis on wiring and connector(s) between
the engine-A/T-ECU <A/T> or the engine-ECU
<M/T> and the output shaft speed sensor. For
diagnosis procedures, refer to "How to treat past
trouble" (Refer to GROUP 00
− How to Use
Troubleshooting/Inspection Service Points
POSSIBLE CAUSES
• Malfunction of the engine-A/T-ECU <A/T> or
engine-ECU <M/T>
• Defective combination meter
• Malfunction of the ETACS-ECU
DIAGNOSIS PROCEDURE
Step 1. MUT-III CAN bus diagnostics
Use the MUT-III to diagnose the CAN bus lines.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the CAN bus line (Refer to GROUP
54D
− Diagnosis
go to Step 6.
Step 2. MUT-III diagnosis code
Check whether the combination meter-related
diagnosis code is set.
Q: Is the diagnosis code set?
YES :
Diagnose the combination meter (Refer to
GROUP 54A
− Troubleshooting
NO :
Go to Step 3.
Step 3. MUT-III diagnosis code
Check if a diagnosis code, which relates to CAN
communication-linked systems below, is set.
• Multi-centre display
U1113: Combination meter failure information
diagnosis code
Q: Is the diagnosis code set?
YES :
Go to Step 4.
NO :
Go to Step 5.
Step 4. Check whether the diagnosis code is
reset.
Check again if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Ignition switch: LOCK (OFF) position to ON
(3) On completion, check that the diagnosis code is
not reset.
Q: Is the check result normal?
YES :
A poor connection, open circuit or other
intermittent malfunction is present in the
CAN bus lines between the engine-A/T-ECU
<A/T> or the engine-ECU <M/T> and the
output shaft speed sensor (Refer to GROUP
00
− How to Use
Troubleshooting/Inspection Service Points
).
NO :
Then go to Step 6.
Step 5. Check whether the diagnosis code is
reset.
Recheck if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Ignition switch: LOCK (OFF) position to ON
(3) On completion, check that the diagnosis code is
not reset.
Q: Is the check result normal?
YES :
A poor connection, open circuit or other
intermittent malfunction is present in the
CAN bus lines between the engine-A/T-ECU
<A/T> or the engine-ECU <M/T> and the
output shaft speed sensor (Refer to GROUP
00
− How to Use
Troubleshooting/Inspection Service Points
).
NO :
Replace the ETACS-ECU, and then go to
Step 6.
Step 6. Check whether the diagnosis code is
reset.
Recheck if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Ignition switch: LOCK (OFF) position to ON
(3) On completion, check that the diagnosis code is
not reset.
Q: Is the check result normal?
YES :
The procedure is complete.
NO :
Return to Step 1.
TROUBLE SYMPTOM CHART
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-44
TROUBLE SYMPTOM CHART
M1549000800855
<FUNCTION SYSTEM>
Symptom
Inspection
procedure
number
Reference
page
Communication with the SWS monitor is not possible.
A-1
Communication with the column switch (column-ECU) is not possible.
A-2
Communication with the ETACS-ECU is not possible.
A-3
Communication with the front-ECU is not possible.
A-4
Communication with the power window main switch (power window
module) is not possible.
A-5
Communication with the sunroof motor assembly (sunroof-ECU) is not
possible.
A-6
Symptom
Inspection
procedure
number
Reference
page
Alarm Function
Lamp reminder buzzer function does not
work normally.
B-1
Seat belt warning buzzer function does not
work normally.
B-2
Door-ajar warning buzzer function does not
work.
B-3
Turn-signal lamp operation sound function
does not work normally.
B-4
Central door locking
Central door locking system does not work. C-1
The central door locking system does not
function by using the driver's door lock
switch.
C-2
The central door locking system does not
function by using the passenger's door key
cylinder.
C-3
The central door locking system does not
function by using the tailgate key cylinder.
C-4
A door can not be locked or unlocked by
the central door locking system. <LH drive
vehicles>
C-5
A door can not be locked or unlocked by
the central door locking system. <RH drive
vehicles>
The tailgate cannot be opened or closed.
C-6
TROUBLE SYMPTOM CHART
SMART WIRING SYSTEM (SWS) USING SWS MONITOR
54C-45
Power window
Power windows do not work at all.
D-1
Driver's power window does not work by
means of the power window main switch.
<LH drive vehicles>
D-2
Driver's power window does not work by
means of the power window main switch.
<RH drive vehicles>
Relevant power window(s) do not work by
means of the front and rear power window
sub switches.
D-3
Passenger's and/or rear power window(s)
do not work by means of the power window
main switch.
D-4
The window glass lowers automatically
while it is rising.
D-5
Power window anti-trap function does not
work normally.
D-6
The power window timer function does not
work normally.
D-7
Keyless entry system
Keyless entry system does not work.
E-1
Keyless entry hazard lamp answerback
function or the room lamp answerback
function does not work normally.
E-2
Encrypted code cannot be registered.
E-3
The timer lock function does not work after
the doors have been unlocked by the
keyless entry system.
E-4
Multimode keyless entry system function
does not work at all.
E-5
Sunroof
The sunroof does not work at all.
F-1
Any of the sunroof switch positions is
defective.
F-2
Sunroof timer function does not work
normally.
F-3
The sunroof inhibition function does not
work normally (The sunroof operation lock
warning buzzer does not sound).
F-4
Sunroof anti-trap function does not work
normally.
F-5
Symptom
Inspection
procedure
number
Reference
page
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