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
).
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
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
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
).
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
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
). 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
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
).
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
).
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
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
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
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
). 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. 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
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
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
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
). On completion, go to Step
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
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
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
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?
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