Code No.U0141
ETACS CAN Timeout
caution |
- If diagnosis
code No. U0141 is set, be sure to diagnose the CAN bus line.
- When replacing the ECU, always check that the communication circuit is normal.
|
TROUBLE JUDGEMENT
If the signal from ETACS-ECU cannot be received, the gateway-ECU sets diagnosis code No.
U0141.
JUDGEMENT CRITERIA
With the ignition switch is at "ON" position, diagnosis code No. U1190 is not set, if
the communication with ETACS-ECU cannot be established for 2500 ms or more, the gateway-ECU
determines that a problem has occurred.
PROBABLE CAUSES
- Malfunction of CAN bus line
- Malfunction of the gateway-ECU
- 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?
Go to Step 2.
Repair the CAN bus line (Refer to
). Repair the
CAN bus line and go to Step 6.
STEP 2. M.U.T.-III other system diagnosis code
Check again if the diagnosis code is set in the ETACS-ECU.
Q.
Is the diagnosis code set?
Diagnose the ETACS-ECU (Refer to GROUP 54A - ETACS, Troubleshooting
).
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.
A/C-ECU
- Code No.U0141: ETACS CAN timeout
Q.
Is the diagnosis code set?
Go to Step 4.
Go to Step 5.
STEP 4. Check whether the diagnosis code is set again.
Recheck if the diagnosis code is set.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
|
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(3)On completion, check that the diagnosis code is not set again.
|
Q.
Is the diagnosis code set?
Replace ETACS-ECU (Refer to GROUP 54A - ETACS
)
and then go to Step 6.
A poor connection, open circuit or other intermittent malfunction is present in
the CAN bus lines between the ETACS-ECU and the gateway-ECU (Refer to GROUP 00 - How
to Use Troubleshooting/Inspection Service Points
).
STEP 5. Check whether the diagnosis code is set again.
Recheck if the diagnosis code is set.
|
(1)Erase the diagnosis code.
|
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(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
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(3)On completion, check that the diagnosis code is not set again.
|
Q.
Is the diagnosis code set?
Replace gateway-ECU (Refer to
) and then go to
Step 6.
A poor connection, open circuit or other intermittent malfunction is present in
the CAN bus lines between the ETACS-ECU and the gateway-ECU (Refer to GROUP 00 - How
to Use Troubleshooting/Inspection Service Points
).
STEP 6. Check whether the diagnosis code is set again.
Recheck if the diagnosis code is set.
|
(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 not set again.
|
Q.
Is the diagnosis code set?
Go to Step 1.
The procedure is complete.