Mitsubishi Grandis. Manual - part 356

COMBINATION METER

CHASSIS ELECTRICAL

54A-43

Step 7. Check the wiring harness between fuel 
gauge unit connector D-07 (terminal 2) and fuel 
tank pump and gauge unit assembly connector 
D-15 (terminal 2).

Q: Is the wiring harness between fuel gauge unit 

connector D-07 (terminal 2) and fuel tank pump and 

gauge unit assembly connector D-15 (terminal 2) in 
good condition?

YES : 

Go to Step 9.

NO : 

Repair the harness, and then go to Step 10.

Step 8. MUT-III data list

Item No.8A: Fuel gauge (target value)

OK: Fuel gauge and MUT-III displayed values 
agree with each other.

Q: Is the check result normal?

YES : 

Go to Step 11.

NO : 

Go to Step 9.

Step 9. Retest the system.

Check that the fuel gauge works normally.

Q: Is the check result normal?

YES : 

The procedure is complete.

NO : 

Replace fuel tank pump and gauge unit 
assembly and then go to Step 10.

Step 10. Retest the system.

Check that the fuel gauge works normally.

Q: Is the check result normal?

YES : 

The procedure is complete.

NO : 

Replace fuel gauge unit and then go to Step 
11.

Step 11. Retest the system.

Check that the fuel gauge works normally.

Q: Is the check result normal?

YES : 

The procedure is complete.

NO : 

Go to Step 1.

Code No.U1073 Bus Off

CAUTION

If diagnosis code U1073 is set in the combination 
meter, always diagnose the CAN bus lines.

CAUTION

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

TROUBLE JUDGMENT

If the combination meter ceases communicating 
once (i.e. bus off) and then returns to it, the 
combination meter will not communicate for three 

minutes immediately after that point. This 
three-minute period is called "Penalty mode." 
Immediately after the combination meter returns to 
communication, the diagnosis code is set.

COMMENTS ON TROUBLE SYMPTOM

The wiring harness wire or connectors may have 
loose, corroded, or damage terminals, or terminals 
pushed back in the connector, or the combination 
meter may be defective.

AC310633AF

Connector: D-07 <LHD>

Harness side

AC310205

AF

Harness side

Connector: D-07 <RHD>

AC310207

AG

Connector: D-15

D-15 (GR)

Harness side

COMBINATION METER

CHASSIS ELECTRICAL

54A-44

POSSIBLE CAUSES

• Damaged harness wires and connectors

• 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 3.

Step 2. 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 : 

If the trouble is solved, it is determined that 

there is an intermittent malfunction such as 
poor engaged connector(s) or open circuit 
(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 3.

Step 3. 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.U1100 Engine-ECU <M/T> or Engine-A/T-ECU <A/T> Time-out (Related to Engine)

CAUTION

If diagnosis code U1100 or U1101 is set in the 
combination meter, always diagnose the CAN 
bus lines.

CAUTION

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

TROUBLE JUDGMENT

The combination meter receives engine control 
system-related signals from the engine-ECU <M/T> 
or engine-A/T-ECU <A/T> via CAN bus lines. If the 
display unit can not receives the necessary signals, 
diagnosis code U1100 will be set.

COMMENTS ON TROUBLE SYMPTOM

Current trouble

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

lines between the engine-ECU <M/T> or 
engine-A/T-ECU <A/T> and the combination 
meter, the power supply system to the 
engine-ECU <M/T> or engine-A/T-ECU <A/T>, 
the engine-ECU <M/T> or engine-A/T-ECU 
<A/T> 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 engine-ECU <M/T> or 
engine-A/T-ECU <A/T> and the combination 
meter, and the power supply system to the 
engine-ECU <M/T> or engine-A/T-ECU <A/T>. 
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

).

COMBINATION METER

CHASSIS ELECTRICAL

54A-45

CAUTION

If the ignition switch is turned on without starting 
the engine and then three minutes passes, the 
combination meter may store U1102 as past 
trouble.

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 whether the MPI system and the A/T system 
diagnosis codes are set or not.

Q: Is the diagnosis code set?

YES : 

Diagnose the MPI system or the A/T system 

(Refer to GROUP 13A, Troubleshooting 

P.13A-20

 or GROUP 23A, Troubleshooting 

P.23A-17

).

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.
ABS-ECU or TCL/ASC-ECU

• Code No.U1100: engine-ECU <M/T> or 

engine-A/T-ECU <A/T> time-out (related to 
Engine)

Centre display

• Code No.U1100: engine-ECU <M/T> or 

engine-A/T-ECU <A/T> time-out (related to 
Engine)

ETACS-ECU

• Code No.11: engine-ECU <M/T> or 

engine-A/T-ECU <A/T> time-out (related to 
Engine)

A/C-ECU

• Code No.U1100: engine-ECU <M/T> or 

engine-A/T-ECU <A/T> time-out (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 
CAN bus 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.

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?

COMBINATION METER

CHASSIS ELECTRICAL

54A-46

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 
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.U1101 Engine-A/T-ECU <A/T> Time-out (Related to Automatic Transmission)

CAUTION

If diagnosis code U1100 or U1101 is set in the 
combination meter, always diagnose the CAN 
bus lines.

CAUTION

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

TROUBLE JUDGMENT

The combination meter receives transmission control 
system-related signal from the engine-A/T-ECU 
<A/T> via CAN bus lines. If the display unit can not 
receive the necessary signals, diagnosis code U1101 
will be set.
NOTE: For M/T-vehicles, diagnosis code No.U1101 
does not mean that there is a problem.

COMMENTS ON TROUBLE SYMPTOM

Current trouble

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

lines between the engine-A/T-ECU <A/T> and the 
combination meter, the power supply system to 
the engine-A/T-ECU <A/T>, the engine-A/T-ECU 
<A/T> 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 engine-A/T-ECU <A/T> and the 
combination meter, and the power supply system 
to the engine-A/T-ECU <A/T>. 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

).

CAUTION

If the ignition switch is turned to the ON position 
without starting the engine, diagnosis code (past 
trouble) U1102 may be set on the combination 
meter after three minutes.

POSSIBLE CAUSES

• Damaged harness wires and connectors

• Malfunction of 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 whether the MPI system and the A/T system 
diagnosis codes are set or not.

Q: Is the diagnosis code set?