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
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
). 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
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
).
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
).
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
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
). 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
Troubleshooting
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
Power supply circuit.
2
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
The fuel gauge needle moves excessively.
7
Tachometer does not work (other meters work).
8
Fuel Gauge does not work (other meters work).
9
Engine coolant temperature gauge does not work (other
meters work).
10
COMBINATION METER
CHASSIS ELECTRICAL
54A-54
YES :
Go to Step 2.
NO :
Diagnose the MPI system. (Refer to
GROUP 13A, Troubleshooting
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
NO :
Repair the CAN bus lines (Refer to GROUP
54D, Diagnosis
− Can Bus Diagnostics
Table
).
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