Mitsubishi Grandis. Manual - part 382

CENTRE DISPLAY

CHASSIS ELECTRICAL

54A-147

YES : 

A poor connection, open circuit or other 

intermittent malfunction is present in the 
CAN bus lines between the engine-ECU 
<M/T> or engine-A/T-ECU <A/T> and the 
centre display unit (Refer to GROUP 00, 
How to Use Troubleshooting/Inspection 
Service Points 

− How to Cope with 

Intermittent Malfunctions 

P.00-5

).

NO : 

Replace engine-ECU <M/T> or 
engine-A/T-ECU <A/T> and 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) Turn the ignition switch to "ON" position.
(3) Check if the diagnosis code is set.

Q: Is the check result satisfactory?

YES : 

A poor connection, open circuit or other 

intermittent malfunction is present in the 
CAN bus lines between the engine-ECU 
<M/T> or engine-A/T-ECU <A/T> and the 
centre display unit (Refer to GROUP 00, 
How to Use Troubleshooting/Inspection 
Service Points 

− How to Cope with 

Intermittent Malfunctions 

P.00-5

).

NO : 

Replace centre display 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) Turn the ignition switch to "ON" position.
(3) Check if the diagnosis code is set.

Q: Is the check result satisfactory?

YES : 

The procedure is complete.

NO : 

Go to Step 1.

Code No.U1108 Combination Meter Time-out

CAUTION

If diagnosis code U1108 is set in the centre 
display, always diagnose the CAN bus lines.

CAUTION

Whenever the ECU is replaced, ensure that the 
communication circuit is normal.

TROUBLE JUDGMENT

The centre display unit receives signals from the 
combination meter via CAN bus lines. If the display 
unit can not receive the necessary combination 
meter signals, diagnosis code U1108 will be set.

COMMENTS ON TROUBLE SYMPTOM

Current trouble

• Connector(s) or wiring harness in the CAN bus 

lines between the combination meter and the 
centre display unit, the power supply system to 
the display unit, the display unit itself, or the 
combination meter may be defective.

Past trouble

• Carry out diagnosis with particular emphasis on 

connector(s) or wiring harness in the CAN bus 
lines between the combination meter and the 
centre display unit, the power supply system to 
the display unit. For diagnosis procedures, refer 
to "How to cope with past trouble" (Refer to 
GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

P.00-5

).

NOTE: For a past trouble, you may not find it by the 

MUT-III CAN bus diagnostics even if there is any 
failure in CAN bus lines. In this case, refer to 
GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

−

 How 

to Cope with Intermittent Malfunctions 

P.00-5

). 

and check the CAN bus lines. You can narrow 
down the possible cause of the trouble by 
referring to the diagnosis code, which is set 
regarding the CAN communication-linked ECUs 
(Refer to GROUP 54D, Explanation about the 
MUT-III CAN Bus Diagnostics 

P.54D-9

).

POSSIBLE CAUSES

• Damaged harness wires and connectors

• Malfunction of combination meter

• Malfunction of centre display unit

CENTRE DISPLAY

CHASSIS ELECTRICAL

54A-148

DIAGNOSTIC PROCEDURE

Step 1. MUT-III CAN bus diagnostics

Use the MUT-III to diagnose the CAN bus lines.

Q: Is the check result satisfactory?

YES : 

Go to Step 2.

NO : 

Repair the CAN bus lines (Refer to GROUP 
54D, Diagnosis 

− Can Bus Diagnostic Table 

P.54D-16

). Repair the CAN bus line and go 

to Step 6.

Step 2. MUT-III other system 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 

P.54A-35

.

NO : 

Go to Step 3.

Step 3. MUT-III other system diagnosis code

Check if a diagnosis code, which relates to CAN 
communication-linked systems below, is set.
MPI

• Code No.U1108: Combination meter time-out

ETACS-ECU

• Code No.14: Combination meter time-out

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.

Recheck if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Turn the ignition switch to "ON" position.
(3) Check if the diagnosis code is set.

Q: Is the check result satisfactory?

YES : 

A poor connection, open circuit or other 

intermittent malfunction is present in the 
CAN bus lines between the combination 
meter and the centre display unit (Refer to 
GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 

P.00-5

).

NO : 

Replace combination meter and 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) Turn the ignition switch to "ON" position.
(3) Check if the diagnosis code is set.

Q: Is the check result satisfactory?

YES : 

A poor connection, open circuit or other 

intermittent malfunction is present in the 
CAN bus lines between the combination 
meter and the centre display unit (Refer to 
GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 

P.00-5

).

NO : 

Replace centre display 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) Turn the ignition switch to "ON" position.
(3) Check if the diagnosis code is set.

Q: Is the check result satisfactory?

YES : 

The procedure is complete.

NO : 

Go to Step 1.

Code No.U1109 ETACS-ECU Time-out

CAUTION

If diagnosis code U is set in the ETACS-ECU, 
diagnose the CAN main bus line.

CAUTION

Whenever the ECU is replaced, ensure that the 
communication circuit is normal.

TROUBLE JUDGMENT

The centre display unit communicates with the 

ETACS-ECU via CAN bus lines. If it can not receive 
all the necessary signals from the ETACS-ECU, 
diagnosis code U1109 is set.

CENTRE DISPLAY

CHASSIS ELECTRICAL

54A-149

COMMENTS ON TROUBLE SYMPTOM

Current trouble

• Connector(s) or wiring harness in the CAN bus 

lines between the ETACS-ECU and the centre 
display unit, the power supply system to the 
display unit, the display unit itself, or the 
ETACS-ECU may be defective.

Past trouble

• Carry out diagnosis with particular emphasis on 

connector(s) or wiring harness in the CAN bus 
lines between the ETACS-ECU and the centre 
display unit, and the power supply system to the 
ETACS-ECU. For diagnosis procedures, refer to 
"How to cope with past trouble" (Refer to GROUP 
00, How to Use Troubleshooting/Inspection 
Service Points 

P.00-5

).

NOTE: For a past trouble, you may not find it by the 

MUT-III CAN bus diagnostics even if there is any 
failure in CAN bus lines. In this case, refer to 
GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

−

 How 

to Cope with Intermittent Malfunctions 

P.00-5

). 

and check the CAN bus lines. You can narrow 
down the possible cause of the trouble by 
referring to the diagnosis code, which is set 
regarding the CAN communication-linked ECUs 
(Refer to GROUP 54D, Explanation about the 
MUT-III CAN Bus Diagnostics 

P.54D-9

).

POSSIBLE CAUSES

• Damaged harness wires and connectors

• Malfunction of ETACS-ECU

• Malfunction of centre display unit

DIAGNOSTIC PROCEDURE

Step 1. MUT-III CAN bus diagnostics

Use the MUT-III to diagnose the CAN bus lines.

Q: Is the check result satisfactory?

YES : 

Go to Step 2.

NO : 

Repair the CAN bus lines.   (Refer to 
GROUP 54D, Diagnosis 

− Can Bus 

Diagnostics Table 

P.54D-16

). Repair the 

CAN bus line and go to Step 4. 

Step 2. MUT-III other system diagnosis code

Check that the ETACS-ECU sets a diagnosis code.

Q: Is the diagnosis code set?

YES : 

Diagnose the SWS. (Refer to GROUP 54B, 

Troubleshooting 

P.54B-29

 or GROUP 54C, 

Troubleshooting 

P.54C-30

.)

NO : 

Go to Step 3.

Step 3. MUT-III other system diagnosis code

Check whether combination meter-related diagnosis 
code U1109 is set.

Q: Is the diagnosis code set?

YES : 

Replace ETACS-ECU and then go to step 4.

NO : 

Replace centre display unit and then go to 
step 4.

Step 4. Check whether the diagnosis code is 
reset.

Recheck if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Turn the ignition switch to "ON" position.
(3) Check if the diagnosis code is set.

Q: Is the check result satisfactory?

YES : 

The procedure is complete.

NO : 

Go to Step 1.

Code No.U1110 A/C-ECU Time-out

CAUTION

If diagnosis code U1110 is set in the centre 
display, always diagnose the CAN bus lines.

CAUTION

Whenever the ECU is replaced, ensure that the 
communication circuit is normal.

TROUBLE JUDGMENT

When the centre display unit can not receives 
necessary signals from the A/C-ECU via CAN bus 
lines. If the display unit can not receives the 

necessary A/C-ECU signals, diagnosis code U1110 
will be set.

COMMENTS ON TROUBLE SYMPTOM

Current trouble

• Connector(s) or wiring harness in the CAN bus 

lines between the A/C-ECU and the centre 
display unit, the power supply system to the 
display unit, the display unit itself, or the 
A/C-ECU may be defective.

CENTRE DISPLAY

CHASSIS ELECTRICAL

54A-150

Past trouble

• Carry out diagnosis with particular emphasis on 

connector(s) or wiring harness in the CAN bus 
lines between the A/C-ECU and the centre 
display unit, and the power supply system to the 
A/C-ECU. For diagnosis procedures, refer to 
"How to cope with past trouble" (Refer to GROUP 
00, How to Use Troubleshooting/Inspection 
Service Points 

P.00-5

).

NOTE: For a past trouble, you may not find it by the 

MUT-III CAN bus diagnostics even if there is any 
failure in CAN bus lines. In this case, refer to 
GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

−

 How 

to Cope with Intermittent Malfunctions 

P.00-5

). 

and check the CAN bus lines. You can narrow 
down the possible cause of the trouble by 
referring to the diagnosis code, which is set 
regarding the CAN communication-linked ECUs 
(Refer to GROUP 54D, Explanation about the 
MUT-III CAN Bus Diagnostics 

P.54D-9

).

POSSIBLE CAUSES

• Damaged harness wires and connectors

• Malfunction of A/C-ECU

• Malfunction of centre display unit

DIAGNOSTIC PROCEDURE

Step 1. MUT-III CAN bus diagnostics

Use the MUT-III to diagnose the CAN bus lines.

Q: Is the check result satisfactory?

YES : 

Go to Step 2.

NO : 

Repair the CAN bus lines (Refer to GROUP 
54D, Diagnosis 

− Can Bus Diagnostics 

Table 

P.54D-16

). On completion, go to Step 

6.

Step 2. MUT-III other system diagnosis code

Check if an A/C system diagnosis code is set.

Q: Is the diagnosis code set?

YES : 

Diagnose the A/C system (Refer to GROUP 

55, Troubleshooting 

P.55-8

).

NO : 

Go to Step 3.

Step 3. MUT-III other system diagnosis code

Check if a diagnosis code, which relates to CAN 
communication-linked systems below, is set.
Engine-ECU <M/T> or engine-A/T-ECU <A/T>

• Code No.U1110: A/C-ECU time-out

ETACS-ECU

• Code No.013: A/C-ECU time-out

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.

Recheck if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Turn the ignition switch to "ON" position.
(3) Check if the diagnosis code is set.

Q: Is the check result satisfactory?

YES : 

A poor connection, open circuit or other 

intermittent malfunction is present in the 
CAN bus lines between the A/C-ECU and 
the centre display unit (Refer to GROUP 00, 
How to Use Troubleshooting/Inspection 
Service Points 

− How to Cope with 

Intermittent Malfunctions 

P.00-5

).

NO : 

Replace A/C-ECU and 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) Turn the ignition switch to "ON" position.
(3) Check if the diagnosis code is set.

Q: Is the check result satisfactory?

YES : 

A poor connection, open circuit or other 

intermittent malfunction is present in the 
CAN bus lines between the A/C-ECU and 
the centre display unit (Refer to GROUP 00, 
How to Use Troubleshooting/Inspection 
Service Points 

− How to Cope with 

Intermittent Malfunctions 

P.00-5

).

NO : 

Replace centre display 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) Turn the ignition switch to "ON" position.
(3) Check if the diagnosis code is set.

Q: Is the check result satisfactory?