Mitsubishi Colt Ralliart. Manual — part 320
DIAGNOSIS TROUBLE CODE PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-24
Diagnosis code No.U1073: Bus off
CAUTION
If diagnosis code No.U1703 is set in the
ETACS-ECU, diagnose the CAN bus lines.
CAUTION
Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.
TROUBLE JUDGMENT
Diagnosis code No.U1703 will be stored when the
ETACS-ECU ceases CAN communication (bus off)
and then resumes the communication by turning the
ignition switch to the "LOCK" (OFF) position.
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 SWS communi-
cation lines may be defective.
POSSIBLE CAUSES
Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the CAN bus line (Refer to GROUP
54D
− Diagnosis
). On completion,
go to Step 3.
Step 2. Check whether the diagnosis code is
reset.
Check again if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Ignition: LOCK (OFF) position to ON
(3) On completion, check that the diagnosis code is
not reset.
Q: Is the check result normal?
YES :
If a 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 Malfunction
).
NO :
Replace the ETACS-ECU, 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) Ignition switch: LOCK (OFF) position to ON
(3) Check if the diagnosis code is set.
Q: Is diagnoscode No.U1073 set?
YES :
Return to Step 1.
NO :
The procedure is complete.
Diagnosis code No.U1100: Engine-ECU <M/T> or Engine-CVT-ECU <CVT> time-out (related to engine)
Diagnosis code No.U1101: Engine-CVT-ECU time-out (related to CVT) <CVT>
CAUTION
• If diagnosis code No.U1100 or No.U1101 are
set in the ETACS, diagnose the CAN main bus
line.
• Whenever the ECU is replaced, ensure that
the communication circuit is normal.
TROUBLE JUDGMENT
Diagnosis Code No.U1100
• The ETACS-ECU receives engine and transmis-
sion control signals from the engine-ECU <M/T>
or engine-CVT-ECU <CVT> through the CAN bus
lines. If the ECU can not receive the engine con-
trol system-related signal at all, diagnosis code
No.U1100 will be set.
Diagnosis Code No.U1101
• The ETACS-ECU receives engine and transmis-
sion control signals from the engine-CVT-ECU
through the CAN bus lines. If the ECU can not
receive the transmission control system-related
signal at all, diagnosis code No.U1101 will be set.
Main
Index
Group
TOC
DIAGNOSIS TROUBLE CODE PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-25
COMMENTS ON TROUBLE SYMPTOM
Current trouble
• Connector(s) or wiring harness in the CAN bus
lines between the ETACS-ECU and the
engine-ECU <M/T> or engine-CVT-ECU <CVT>,
the power supply circuits to these ECUs, or the
ETACS-ECU itself may be defective.
Past trouble
• If diagnosis code No.U1100 and No.U1101 are
set as past trouble, carry out diagnosis with par-
ticular emphasis on wiring and connector(s) in
the CAN bus lines between the ETACS-ECU and
the engine-ECU <M/T> or engine-CVT-ECU
<CVT>, or power supply to the engine-ECU
<M/T> or engine-CVT-ECU <CVT>. For diagno-
sis procedures, refer to "How to treat past trou-
ble" (refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
− How
).
NOTE: For a past trouble, you can not find it by the
M.U.T.-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/Inspec-
tion Service Points
−
How to Cope with Intermit-
tent 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 communi-
cation-linked ECUs (Refer to GROUP 54D
−
CAN
PROBABLE CAUSES
• Malfunction of the engine-ECU <M/T>
• Malfunction of the engine-CVT-ECU <CVT>
• Malfunction of the ETACS-ECU
• Malfunction of the CAN bus
DIAGNOSIS PROCEDURE
Step 1. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the CAN bus line (Refer to GROUP
54D
− Diagnosis
). Repair the
CAN bus line.
Step 2. M.U.T.-III other system diagnosis code
Check whether the engine-ECU <M/T> or
engine-CVT-ECU <CVT> sets a diagnosis code.
Q: Is the check result normal?
YES :
Diagnose the engine or the CVT (Refer to
GROUP 13A
− Troubleshooting
<4A9>, GROUP 13B
− Troubleshooting
<4G1>, or GROUP 23A
−
Troubleshooting
NO :
Go to Step 3.
Step 3. M.U.T.-III other system diagnosis code
Check whether the combination meter-related diag-
nosis code is set.
Q: Is the check result normal?
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 the "LOCK" (OFF)
position to "ON" position.
(3) On completion, check that the diagnosis code is
not reset.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
use Troubleshooting/inspection Service
Points
− How to Cope with Intermittent
).
NO :
Replace the engine-ECU <M/T> or
engine-CVT-ECU <CVT>.
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 "LOCK" (OFF) position to
"ON" position.
(3) On completion, check that the diagnosis code is
not reset.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
use Troubleshooting/inspection Service
Points
− How to Cope with Intermittent
).
NO :
Replace the ETACS-ECU.
Main
Index
Group
TOC
DIAGNOSIS TROUBLE CODE PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-26
Diagnosis code No.U1102: ABS-ECU or ASC-ECU time-out
CAUTION
• If diagnosis code No.U1102 is set in the
ETACS-ECU, diagnose the CAN bus lines.
• Whenever the ECU is replaced, ensure that
the input and output signal circuits are nor-
mal.
TROUBLE JUDGMENT
The ETACS-ECU receives ABS or ASC sys-
tem-related signals from the ABS-ECU or ASC-ECU.
If meter-related signal can not be received at all,
diagnosis code No.U1102 will be set.
COMMENT ON TROUBLE SYMPTOM
Current trouble
• Connector(s) or wiring harness in the CAN bus
lines between the ABS-ECU or ASC-ECU and
the ETACS-ECU, the power supply system to the
ABS-ECU or ASC-ECU, the ABS-ECU or
ASC-ECU itself, or the ETACS-ECU may be
defective.
Past trouble
• If diagnosis code No.U1102 are stored as a past
trouble, carry out diagnosis with particular
emphasis on wiring and connector(s) in the CAN
bus line between the ABS-ECU or ASC-ECU and
the ETACS-ECU, and the power supply system to
the ABS-ECU or ASC-ECU. For diagnosis proce-
dures, refer to "How to treat past trouble" (refer to
GROUP 00, How to Use Troubleshooting/Inspec-
tion Service Points
− How to Treat Past Trouble
NOTE: For a past trouble, you can not find it by the
M.U.T.-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/Inspec-
tion Service Points
−
How to Cope with Intermit-
tent 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 communi-
cation-linked ECUs (Refer to GROUP 54D
−
CAN
PROBABLE CAUSES
• Malfunction of the ABS-ECU
• Malfunction of the ASC-ECU
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the CAN bus line (Refer to GROUP
54D
− Diagnosis
). On completion,
go to Step 5.
Step 2. M.U.T.-III other system diagnosis code
Check if a ABS-ECU or ASC-ECU diagnosis code is
set.
Q: Is the diagnosis code set?
YES :
Diagnose the ABS or ASC (Refer to
GROUP 35B
− Troubleshooting
<ABS> or GROUP 35C
− Troubleshooting
<ASC>).
NO :
Go to Step 3.
Step 3. M.U.T.-III other system diagnosis code
Check whether the combination meter sets ABS or
ASC-related time-out diagnosis code.
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 the "LOCK" (OFF)
position to "ON" position.
(3) On completion, check that the diagnosis code is
not reset.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
use Troubleshooting/inspection Service
Points
− How to Cope with Intermittent
).
NO :
Replace the ABS-ECU or ASC-ECU.
Main
Index
Group
TOC
DIAGNOSIS TROUBLE CODE PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-27
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 the "LOCK" (OFF)
position to "ON" position.
(3) On completion, check that the diagnosis code is
not reset.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
use Troubleshooting/inspection Service
Points
− How to Cope with Intermittent
).
NO :
Replace the ETACS-ECU.
Diagnosis code No.U1110: Meter and A/C-ECU time-out (related to A/C)
Diagnosis code No.U1108: Meter and A/C-ECU time-out (related to meter)
CAUTION
• If diagnosis code No.U1110 or No.U1108 are
set in the ETACS-ECU, diagnose the CAN bus
lines.
• Whenever the ECU is replaced, ensure that
the input and output signal circuits are nor-
mal.
TROUBLE JUDGMENT
Diagnosis Code No.U1110
• The ETACS-ECU receives air conditioner system
and meter-related signals from the combination
meter (incorporating the meter and A/C-ECU). If
air conditioner control system-related signal can
not be received at all, diagnosis code No.U1110
will be set.
Diagnosis Code No.U1108
• The ETACS-ECU receives air conditioner system
and meter-related signals from the combination
meter (incorporating the meter and A/C-ECU). If
meter-related signal can not be received at all,
diagnosis code No.U1108 will be set.
COMMENT ON TROUBLE SYMPTOM
Current trouble
• Connector(s) or wiring harness in the CAN bus
lines between the A/C-ECU and the
ETACS-ECU, the power supply system to the
combination meter, the combination meter itself,
or the ETACS-ECU may be defective.
Past trouble
• If diagnosis code No.U1110 or No.U1108 are
stored as a past trouble, carry out diagnosis with
particular emphasis on wiring and connector(s) in
the CAN bus line between the combination meter
and the ETACS-ECU, and the power supply sys-
tem to the combination meter. For diagnosis pro-
cedures, refer to "How to treat past trouble" (refer
to GROUP 00, How to Use Troubleshoot-
ing/Inspection Service Points
− How to Treat Past
Trouble
NOTE: For a past trouble, you can not find it by the
M.U.T.-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/Inspec-
tion Service Points
−
How to Cope with Intermit-
tent 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 communi-
cation-linked ECUs (Refer to GROUP 54D
−
CAN
PROBABLE CAUSES
• Malfunction of the combination meter (incorporat-
ing the meter and A/C-ECU)
• Malfunction of the ETACS-ECU
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the CAN bus line (Refer to GROUP
54D
− Diagnosis
). On completion,
go to Step 5.
Main
Index
Group
TOC
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