Code No.U0155 Meter CAN timeout
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- If diagnosis code No. U0155 is set, be sure to diagnose the CAN bus line.
- When replacing the ECU, always check that the communication circuit is normal.
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OPERATION
The combination meter sets diagnosis code No.U0155 when it cannot receive signals from the combination meter.
TROUBLE JUDGEMENT
If the communication with combination meter cannot be established for 2500 ms or more.
PROBABLE CAUSES
- Malfunction of CAN bas line
- Malfunction of combination meter power supply circuit
- Malfunction of combination meter
- Malfunction of clearance warning control unit
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 GROUP 54C - Troubleshooting 
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STEP 2. Check the M.U.T.-III Diagnosis code for other system.
Check if diagnosis code No. U0155 is set in the A/T-ECU.
Q.
Is the diagnosis code set?
Go to Step 3.
Go to Step 4.
STEP 3. Check whether the diagnosis code is set again.
Check again if the diagnosis code is set in the clearance warning control unit.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
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(3)Check if the diagnosis code is set.
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Q.
Is the diagnosis code set?
Replace the combination meter (Refer to ).
A poor connection, open circuit, or other intermittent malfunction in the CAN bus line between the clearance warning control unit and the combination meter. (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)
STEP 4. Check whether the diagnosis code is set again.
Check again if the diagnosis code is set in the clearance warning control unit.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
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(3)Check if the diagnosis code is set.
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Q.
Is the diagnosis code set?
Replace the clearance warning control unit (Refer to ).
A poor connection, open circuit, or other intermittent malfunction in the CAN bus line between the clearance warning control unit and the combination meter. (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)