Code No.U0155:
Meter CAN timeout
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- If diagnosis
code U0155 is set in the multivision display, diagnose the CAN main bus line.
- Whenever the ECU is replaced, ensure that the communication circuit is normal.
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| note |
When the diagnosis codes relating to the CAN communication error are set, make sure of
the vehicle equipment. When the vehicle is not equipped with the system the multivision display communicates
to, the diagnosis code is always set. This is not abnormal.
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TROUBLE JUDGEMENT
The multivision display receives signal from the combination meter via CAN bus lines.
If it cannot receive all the necessary signals from the combination meter, diagnosis code U0155
is set.
COMMENTS ON TROUBLE SYMPTOM
Current trouble
- Connector(s) or wiring harness in the CAN bus lines between the combination meter
and the multivision display, the power supply system to the combination meter, the combination
meter itself, or the multivision display 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 multivision display, and the power supply
system to the combination meter. For diagnosis procedures, refer to "How to cope with past trouble"
(Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points).
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For a past trouble, you may 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/Inspection
Service Points. 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 54C - CAN Bus Line Diagnostic Flow).
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PROBABLE CAUSES
- Damaged harness wires and connectors
- Malfunction of combination meter
- Malfunction of multivision display
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 lines. (Refer to GROUP 54C - Troubleshooting 
).
Repair the CAN bus line and go to Step 4.
STEP 2. M.U.T.-III other system diagnosis code
Check that the combination meter sets a diagnosis code.
Q.
Is the diagnosis code set?
Diagnose the combination meter 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.
ETACS-ECU
- Code No.U1108: meter 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 to "ON" position.
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(3)On completion, check that the diagnosis code is not set again.
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Q.
Is the diagnosis code set?
Replace combination meter and then go to Step 6.
A poor connection, open circuit or other intermittent malfunction is present in
the CAN bus lines between the combination meter and the multivision display (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.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch to "ON" position.
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(3)On completion, check that the diagnosis code is not set again.
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Q.
Is the diagnosis code set?
Replace multivision display (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 combination meter and the multivision display (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.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch to "ON" position.
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(3)On completion, check that the diagnosis code is not set again.
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Q.
Is the diagnosis code set?
Go to Step 1.
The procedure is complete.