Mitsubishi Grandis. Manual - part 358

COMBINATION METER

CHASSIS ELECTRICAL

54A-51

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.U1120 Failure Information on engine-ECU <M/T> or Engine-A/T-ECU (Related to Engine)

CAUTION

If diagnosis code U1120 is set in the combination 
meter, diagnose the CAN main bus line.

TROUBLE JUDGMENT

The combination meter communicates with the 
engine-ECU <M/T> or engine-A/T-ECU <A/T> via 
CAN bus line. If failure information is sent to the 
engine-ECU <M/T> or engine-A/T-ECU <A/T>, 
diagnosis code U1120 will be set.

COMMENTS ON TROUBLE SYMPTOM

Current trouble

• The engine-ECU <M/T> or engine-A/T-ECU 

<A/T> or the combination meter may be 
defective.

Past trouble

• Carry out diagnosis with particular emphasis on 

connector(s) or wiring harness between the 
engine-ECU <M/T> or engine-A/T-ECU <A/T> 
and the combination meter. 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

).

POSSIBLE CAUSES

• Damaged harness wires and connectors

• Malfunction of engine-ECU <M/T> or 

engine-A/T-ECU <A/T>

• Malfunction of combination meter

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 6.

Step 2. MUT-III other system diagnosis code
Check if an MPI system diagnosis code is set.

Q: Is the diagnosis code set?

YES : 

Diagnose the MPI system (Refer to GROUP 

13A, Troubleshooting 

P.13A-20

).

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.
Centre display

• Code No.U1120: Failure information on 

engine-ECU <M/T> or engine-A/T-ECU <A/T> 
(related to engine)

A/C-ECU

• Code No.U1120: Failure information on 

engine-ECU <M/T> or engine-A/T-ECU <A/T> 
(related to engine)

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 
lines between the engine-ECU <M/T> or 
engine-A/T-ECU <A/T> and the combination 
meter (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.

COMBINATION METER

CHASSIS ELECTRICAL

54A-52

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 
lines between the engine-ECU <M/T> or 
engine-A/T-ECU <A/T> and the combination 
meter (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 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.U1206 Flag invalid

CAUTION

If diagnosis code U1206 is set in the combination 
meter, diagnose the CAN main bus line.

TROUBLE JUDGMENT

When the ignition switch is in the LOCK (OFF) 
position, the combination meter receives door-open 
signal or communication standby instruction from the 
ETACS-ECU and keeps CAN communication. If 
there is a contradiction between these two signals, 
diagnosis code U1206 will be set.

COMMENTS ON TROUBLE SYMPTOM

Current trouble

• The door switch system of the ETACS-ECU, the 

ETACS-ECU, or the combination meter may be 
defective.

Past trouble

• Carry out diagnosis with particular emphasis on 

connector(s) or wiring harness between the 
ETACS-ECU and the door switch, 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

).

POSSIBLE CAUSES

• Damaged harness wires and connectors

• Malfunction of ETACS-ECU

• Malfunction of combination meter

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 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. Replace the ETACS-ECU and then 
recheck the diagnosis code.

Replace the ETACS-ECU, and then check that the 
diagnosis code is not reset.

Q: Is the check result satisfactory?

YES : 

Go to Step 4.

NO : 

Replace combination meter and then go to 
step 4.

COMBINATION METER

CHASSIS ELECTRICAL

54A-53

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.

TROUBLE SYMPTOM CHART

M1543007201332

CAUTION

During diagnosis, a diagnosis code associated 
with other system may be set when the ignition 
switch is turned on with connector(s) 
disconnected. On completion, confirm all 
systems for diagnosis code(s). If diagnosis 
code(s) are set, erase them all.

CAUTION

When the battery cable is disconnected or the 
combination meter is removed, the fuel gauge 
learned value will be erased. To let the display 
unit re-learn it, enter the vehicle speed (by 
driving the vehicle or entering simulated vehicle 
speed) and then stop the vehicle.

SYMPTOM PROCEDURES

INSPECTION PROCEDURE 1: Communication with the MUT-III is not possible.

COMMENTS ON TROUBLE SYMPTOM

If the system does not communicate with the MUT-III, 
power supply to the diagnosis connector or CAN bus 
lines may be defective.

POSSIBLE CAUSES

• Damaged harness wires and connectors

DIAGNOSTIC PROCEDURE

Step 1. Check that the engine-ECU <M/T> or the 
engine-A/T-ECU <A/T> communicates with the 
MUT-III.

Check that the MUT-III communicates with the 
engine-ECU <M/T> or the engine-A/T-ECU when the 
MUT-III is operated..

Q: Is the check result satisfactory?

Trouble symptom

Inspection 
procedure 
number

Reference page

Communication with the MUT-III is not possible.

1

P.54A-53

Power supply circuit.

2

P.54A-55

Odometer and trip meter are not displayed.

3

All the needle meters do not work.

4

When the ignition switch is turned to the ON position, the 
indicator and warning lamps do not illuminate.

5

Speedometer does not work (other meters work).

6

P.54A-62

The fuel gauge needle moves excessively.

7

Tachometer does not work (other meters work).

8

P.54A-64

Fuel Gauge does not work (other meters work).

9

P.54A-66

Engine coolant temperature gauge does not work (other 
meters work).

10

P.54A-73

COMBINATION METER

CHASSIS ELECTRICAL

54A-54

YES : 

Go to Step 2.

NO : 

Diagnose the MPI system. (Refer to 
GROUP 13A, Troubleshooting 

P.13A-20

.)

Step 2. MUT-III CAN bus diagnostics

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

Q: Is the check result satisfactory?

YES : 

Diagnose the power supply circuit. Refer to 

P.54A-55

.

NO : 

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

− Can Bus Diagnostics 

Table 

P.54D-16

).