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 

P.54D-16

). On completion, 

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 

P.54A-35

).

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 

P.00-5

).

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 

P.00-5

).

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 

P.00-5

).

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 

P.54D-16

). On completion, 

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 

P.54A-35

).

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 

P.00-5

).

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 

P.00-5

).

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

 

P.54C-52

Communication with the column switch (column-ECU) is not possible.

A-2

 

P.54C-56

Communication with the ETACS-ECU is not possible.

A-3

 

P.54C-63

Communication with the front-ECU is not possible.

A-4

 

P.54C-70

Communication with the power window main switch (power window 
module) is not possible.

A-5

 

P.54C-77

Communication with the sunroof motor assembly (sunroof-ECU) is not 
possible.

A-6

 

P.54C-90

Symptom

Inspection 
procedure 
number

Reference 
page

Alarm Function

Lamp reminder buzzer function does not 
work normally.

B-1

 

P.54C-99

Seat belt warning buzzer function does not 
work normally.

B-2

 

P.54C-101

Door-ajar warning buzzer function does not 
work.

B-3

 

P.54C-102

Turn-signal lamp operation sound function 
does not work normally.

B-4

 

P.54C-104

Central door locking

Central door locking system does not work. C-1

 

P.54C-106

The central door locking system does not 
function by using the driver's door lock 
switch.

C-2

 

P.54C-109

The central door locking system does not 
function by using the passenger's door key 
cylinder.

C-3

 

P.54C-110

The central door locking system does not 
function by using the tailgate key cylinder.

C-4

 

P.54C-112

A door can not be locked or unlocked by 
the central door locking system. <LH drive 
vehicles>

C-5

 

P.54C-114

A door can not be locked or unlocked by 
the central door locking system. <RH drive 
vehicles>

 

P.54C-121

The tailgate cannot be opened or closed.

C-6

 

P.54C-127

TROUBLE SYMPTOM CHART

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-45

Power window

Power windows do not work at all.

D-1

 

P.54C-131

Driver's power window does not work by 
means of the power window main switch. 
<LH drive vehicles>

D-2

 

P.54C-133

Driver's power window does not work by 
means of the power window main switch. 
<RH drive vehicles>

 

P.54C-135

Relevant power window(s) do not work by 
means of the front and rear power window 
sub switches.

D-3

 

P.54C-137

Passenger's and/or rear power window(s) 
do not work by means of the power window 
main switch.

D-4

 

P.54C-156

The window glass lowers automatically 
while it is rising.

D-5

 

P.54C-173

Power window anti-trap function does not 
work normally.

D-6

 

P.54C-174

The power window timer function does not 
work normally.

D-7

 

P.54C-185

Keyless entry system

Keyless entry system does not work.

E-1

 

P.54C-186

Keyless entry hazard lamp answerback 
function or the room lamp answerback 
function does not work normally.

E-2

 

P.54C-188

Encrypted code cannot be registered.

E-3

 

P.54C-189

The timer lock function does not work after 
the doors have been unlocked by the 
keyless entry system.

E-4

 

P.54C-190

Multimode keyless entry system function 
does not work at all.

E-5

 

P.54C-190

Sunroof

The sunroof does not work at all.

F-1

 

P.54C-192

Any of the sunroof switch positions is 
defective.

F-2

 

P.54C-194

Sunroof timer function does not work 
normally.

F-3

 

P.54C-196

The sunroof inhibition function does not 
work normally (The sunroof operation lock 
warning buzzer does not sound).

F-4

 

P.54C-199

Sunroof anti-trap function does not work 
normally.

F-5

 

P.54C-202

Symptom

Inspection 
procedure 
number

Reference 
page