Mitsubishi Colt Ralliart. Manual — part 321
DIAGNOSIS TROUBLE CODE PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-28
Step 2. M.U.T.-III other system diagnosis code
Check if a combination meter diagnosis code is set.
Q: Is the diagnosis code set?
YES :
Diagnose the combination meter (Refer to
GROUP 54A
− Troubleshooting
NO :
Go to Step 3.
Step 3. M.U.T.-III other system diagnosis code
Check whether the engine-ECU <M/T> or
engine-CVT-ECU <CVT> sets meter and air-condi-
tioner-related time-out diagnosis code.
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 combination meter
(incorporating the meter and A/C-ECU).
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.
Main
Index
Group
TOC
DIAGNOSIS TROUBLE CODE PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-29
Diagnosis code No.U1128: Meter and A/C-ECU failure information (related to meter)
CAUTION
• If diagnosis code No.U1128 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 combination
meter-related signal from the combination meter via
the CAN bus lines. If a fail-safe related data is con-
tained in the signal from the combination meter, diag-
nosis code No.U1128 will be stored.
COMMENT ON TROUBLE SYMPTOM
Current trouble
• Connector(s) or wiring harness in the CAN bus
lines, the engine-ECU <M/T> or
engine-CVT-ECU <CVT>, the combination meter
or the ETACS-ECU may be defective.
Past trouble
• If diagnosis code No.U1128 is 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 system to the
combination meter. For diagnosis procedures,
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 engine-ECU <M/T>
• Malfunction of the engine-CVT-ECU <CVT>
• Defective combination meter
• Malfunction of the ETACS-ECU
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
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 diagnosis code set?
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 diagnosis code set?
YES :
Diagnose the combination meter (Refer to
GROUP 54A
− Troubleshooting
NO :
Go to Step 4.
Step 4. Check whether the diagnosis code is
reset
Check again 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.
Main
Index
Group
TOC
DIAGNOSIS TROUBLE CODE PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-30
Diagnosis code No.B1706: Blown fuse is detected in fuse No.31 (hazard fuse).
CAUTION
• If diagnosis code No.B1706 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
When junction block fuse No.31 is blown, diagnosis
diagnosis code No.B1706 is set. However, if the sys-
tem returns to normal condition, diagnosis code
No.B1706 will be erased automatically.
COMMENT ON TROUBLE SYMPTOM
Junction block fuse No.31 or the ETACS-ECU may
be defective.
PROBABLE CAUSES
• Malfunction of the Junction block fuse No. 31
• Damaged harness wires and connectors
• Malfunction of the ETACS-ECU
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
Step 2. Check the Junction block fuse No.31
Q: Is the fuse in good condition?
YES :
Go to Step 3.
NO :
Replace the Junction block fuse No.31, and
then go to Step 6.
Step 3. Connector check: B-134 ETACS-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Repair the defective connector.
Step 4. Voltage measurement at the B-134
ETACS-ECU connector
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Voltage between B-134 ETACS-ECU connector
terminal No. 5 and body earth
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Go to Step 5.
AC313826
Connector: B-134
AG
Junction block side
Junction block (Rear view)
AC313826
Connector: B-134
AG
Junction block side
Junction block (Rear view)
AC310507 FG
Connector B-134
(Junction block side)
Main
Index
Group
TOC
DIAGNOSIS TROUBLE CODE PROCEDURES
SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR
54B-31
Step 5. Check the wiring harness between
B-134ETACS-ECU connector terminal No. 1 to
fusible link (1).
Check the power supply line for open circuit.
NOTE:
Prior to the wiring harness inspection, check junction
block connector B-108 and repair if necessary.
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 : .
Repair the wiring harness.
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 the "LOCK" (OFF)
position to "ON" position.
(3) Check if the diagnosis code is set.
Q: Is the check result satisfactory?
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.
AC313826
Connector: B-134
AG
Junction block side
Junction block (Rear view)
AC313824 AG
Connector: B-108
Harness side
Junction block (Front view)
B-108 (B)
Main
Index
Group
TOC
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст