Mitsubishi L200. Manual — part 783
ETACS
CHASSIS ELECTRICAL
54A-499
STEP 3. Check the wiring harness between C-218
ETACS-ECU connector terminal No.20 and the
fusible link (20).
NOTE:
Prior to the wiring harness inspection, check junction
block connector C-213, and repair if necessary.
• Check the power supply line for open circuit.
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Repair the wiring harness. Go to Step 5.
AC503086
AD
Battery
Front of vehicle
24
23
22
21
20
19
Fusible link (20)
AC509934
Connectors: C-213, C-218 <LHD>
Junction block (Front view)
C-213
C-213
CP
Harness side
C-218
C-218
Junction block side
AC509943
Connector: C-218 <RHD>
AC
Junction block
(Rear view)
Junction block side
AC509936
Connector: C-213 <RHD>
Harness side
AI
Junction block
(Front view)
ETACS
CHASSIS ELECTRICAL
54A-500
STEP 4. Check the wiring harness between C-219
ETACS-ECU connector terminal No.74 and the
ignition switch (ACC).
NOTE:
Prior to the wiring harness inspection, check joint
connector C-127, junction block connectors C-207
and C-208, and repair if necessary.
• Check the power supply line for open circuit.
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
Malfunction ). Go to Step 5.
NO :
Repair the wiring harness. Go to Step 5.
STEP 5. Check whether the diagnosis code is
reset.
Check if diagnosis code No.B1762 or B1765 is set to
the ETACS-ECU.
Q: Is the diagnosis code set?
YES :
Replace the ETACS-ECU and register the
ID codes (Refer to
NO :
The procedure is complete.
AC509935AG
Connectors: C-207, C-208, C-219 <LHD>
C-219 (GR)
C-207
Harness side
C-219
C-208
C-208
C-207
Harness side
Harness side
AC509943
Connector: C-219 <RHD>
AB
C-219 (GR)
Harness side
Junction block
(Rear view)
AC903853
Connector: C-127 <LHD>
AE
C-127 (GR)
AC903865
Connector: C-127 <RHD>
AD
C-127 (GR)
AC509936
Connectors: C-207, C-208 <RHD>
C-207
C-208
C-207
Harness side
Harness side
C-208
AB
Junction block
(Front view)
ETACS
CHASSIS ELECTRICAL
54A-501
Code No.U1073: Bus off
CAUTION
• If diagnosis code No.U1073 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 JUDGEMENT
Diagnosis code No.U1073 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.
COMMENT ON TROUBLE SYMPTOM
The wiring harness wire or connectors may have
loose, corroded, or damaged terminals, or terminals
pushed back in the connector.
PROBABLE 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
54C
− Troubleshooting ). On completion, go
to Step 3.
STEP 2. Check whether the diagnosis code is
reset.
Check again if the diagnosis code is set to the
ETACS-ECU.
(1) Erase the diagnosis code.
(2) Turn the ignition switch from "LOCK" (OFF)
position to "ON" position.
(3) On completion, check that the diagnosis code is
reset.
Q: Is the diagnosis code set?
YES :
Replace the ETACS-ECU and register the
ID codes (Refer to
), and Then go
to Step 3.
NO :
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
).
STEP 3. Check whether the diagnosis code is
reset.
Recheck if the diagnosis code is set to the ETACS-
ECU.
(1) Erase the diagnosis code.
(2) Turn the ignition switch from "LOCK" (OFF)
position to "ON" position.
(3) Check if the diagnosis code is reset.
Q: Is the diagnosis code set?
YES :
Return to Step 1.
NO :
The procedure is complete.
Code No.U1100: Engine-ECU time-out (Related to Engine)
Code No.U1101: A/T-ECU time-out (Related to A/T)
CAUTION
• If diagnosis code No.U1100 or U1101 is set in
the ETACS, diagnose the CAN main bus line.
• Whenever the ECU is replaced, ensure that
the communication circuit is normal.
• For M/T-vehicles, diagnosis code No. U1101
does not mean that there is a problem..
TROUBLE JUDGEMENT
Diagnosis code No.U1100
• The ETACS-ECU receives engine control sys-
tem-related signals from the engine-ECU through
the CAN bus lines. If the ECU cannot receive the
engine control system-related signal at all, diag-
nosis code No.U1100 will be set.
Diagnosis code No.U1101
• The ETACS-ECU receives the transmission con-
trol signals from the A/T-ECU <A/T> via CAN bus
lines. If the ECU cannot receive the transmission
control signal at all, diagnosis code No.U1101 will
be set.
ETACS
CHASSIS ELECTRICAL
54A-502
COMMENT ON TROUBLE SYMPTOM
The M.U.T.-III shows a diagnosis code status as
active.
• Connector(s) or wiring harness in the CAN bus
lines between the ETACS-ECU and the engine-
ECU or the A/T-ECU <A/T>, the power supply cir-
cuits to the engine-ECU or the A/T-ECU <A/T>
itself may be defective.
The M.U.T.-III shows a diagnosis code status as
stored.
• If diagnosis code No.U1100 or U1101 is set as
past trouble, carry out diagnosis with particular
emphasis on wiring and connector(s) in the CAN
bus lines between the ETACS-ECU and the
engine-ECU or the A/T-ECU <A/T>, or power
supply to the engine-ECU or the A/T-ECU <A/T>.
For diagnosis procedures, refer to GROUP 00,
How to Use Troubleshooting/Inspection Service
Points
− How to Treat Past Trouble .
NOTE: For a past trouble, you cannot 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 probable cause of the
trouble by referring to the diagnosis code, which
is set regarding the CAN communication-linked
ECUs (Refer to GROUP 54C
−
CAN Bus Line
Diagnostic Flow ).
PROBABLE CAUSES
• Malfunction of the engine-ECU or the A/T-ECU
<A/T>
• 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
54C
− Troubleshooting ). On completion, go
to Step 6.
STEP 2. Check the diagnosis code of the engine-
ECU or the A/T-ECU <A/T>.
Check if the diagnosis code is set in either of the
engine-ECU or the A/T-ECU <A/T>.
Q: Is the diagnosis code set?
YES :
Diagnose the engine-ECU or the A/T-ECU
(Refer to GROUP 13A
− Troubleshooting
<engine-ECU> or GROUP 23A
Troubleshooting <A/T-ECU>). On
completion, go to Step 6.
NO :
Go to Step 3.
STEP 3. M.U.T.-III other system diagnosis code
Check if a diagnosis code, which relates to CAN
communication-linked systems below, is set.
• ABS-ECU
U1100: Engine-ECU time-out or U1101: A/T-ECU
time-out <A/T>
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.
Check again if the diagnosis code is set to the
ETACS-ECU.
(1) Erase the diagnosis code.
(2) Turn the ignition switch from "LOCK" (OFF)
position to "ON" position.
(3) On completion, check that the diagnosis code is
reset.
Q: Is the diagnosis code set?
YES :
Replace the engine-ECU or the A/T-ECU
<A/T>. Then, carry out the CAN bus
diagnostics.Then go to Step 6.
NO :
A poor connection, open circuit or other
intermittent malfunction is present in the
CAN bus lines between the engine-ECU or
the A/T-ECU <A/T> and the ETACS-ECU
(Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
−
How to Cope with Intermittent Malfunctions
).
STEP 5. Check whether the diagnosis code is
reset.
Check again if the diagnosis code is set to the
ETACS-ECU.
(1) Erase the diagnosis code.
(2) Turn the ignition switch from "LOCK" (OFF)
position to "ON" position.
(3) On completion, check that the diagnosis code is
reset.
Q: Is the diagnosis code set?
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