Code No. U1108:
Meter CAN timeout/ Not equipped
| caution |
- If there is any
problem in the CAN bus lines, an incorrect diagnosis code may be set. Prior to this diagnosis,
diagnose the CAN bus lines (Refer to GROUP 54C, CAN Bus Diagnostics Table
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- Whenever ECU is replaced, ensure that the CAN bus lines are normal.
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OPERATION
The signals from the combination meter are sent to the
EPS-ECU.
DIAGNOSIS CODE SET CONDITION
EPS-ECU receives the odometer data (wheel speed sensor data) from the combination meter
via CAN bus lines. If the EPS-ECU cannot receive the odometer data, diagnosis code No.U1108
will be set.
COMMENT ON TROUBLE SYMPTOM
Current trouble
- The wiring harness or connector in the CAN bus lines between the EPS-ECU and combination meter,
the power supply system of the combination meter, or the EPS-ECU itself may be defective.
Past trouble
- If diagnosis code No.U1108 is set as a historic trouble, carry out the diagnosis
with particular emphasis on the wiring harness and connector in the CAN bus lines between the
EPS-ECU and combination meter as well as on the power supply system of the combination meter.
For diagnosis procedures, refer to "How to treat past trouble" (Refer to GROUP 00 - How
to Use Troubleshooting/Inspection Service Points ).
| note |
In case of a historic trouble, the M.U.T.-III CAN bus diagnosis cannot find the problem
even when there is an abnormality in the CAN bus. In this case, be sure to diagnose the CAN
bus lines in the same manner as for "How to Cope with Intermittent Malfunction" (refer to GROUP
00 - How to Use Troubleshooting/Inspection Service Points ).
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 - Explanation
About the M.U.T.-III CAN Bus Diagnostics ).
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PROBABLE CAUSES
- Defective harness wire(s) or connector(s)
- Malfunction of the combination meter
- Malfunction of the EPS-ECU
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STEP 1. M.U.T.-III CAN bus diagnosis
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Use the M.U.T.-III to diagnose the CAN bus lines.
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Q.
Is the check result normal?
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 Go to Step 2.
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 Repair the CAN bus lines (Refer to GROUP 54C, Troubleshooting ).
After repairing the CAN bus lines, go to Step 2.
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STEP 2. Use M.U.T.-III to confirm a diagnosis code of other systems.
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Check if a combination meter-related diagnosis code is set.
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Q.
Is the diagnosis code set?
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Perform the troubleshooting for the combination meter (Refer to GROUP 54A - Troubleshooting ).
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Go to Step 3.
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STEP 3. Check whether the diagnosis code is set again.
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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 diagnosis code U1108 set?
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Replace the EPS-ECU (Refer to ), and then go to
Step 4.
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Go to Step 4.
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STEP 4. Check whether the diagnosis code is set again.
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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 diagnosis code U1108 set?
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Return to Step 1.
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The diagnosis is complete.
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