If diagnosis
code No.U1108 is set in the ETACS-ECU, diagnose the CAN main bus line.
Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.
TROUBLE JUDGEMENT
If signal from the combination meter cannot be received for 500 milliseconds or more,
the ETACS-ECU sets diagnosis code No. U1108.
PROBABLE CAUSES
Malfunction of the combination meter
Malfunction of the ETACS-ECU
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?
Go to Step 2
Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting ).
On completion, go to Step 5.
STEP 2. Check the M.U.T.-III Diagnosis code for other systems
Check that the combination meter set a diagnosis code.
Q.
Is the diagnosis code set?
Diagnose the combination meter. Refer to .
Go to Step 3
STEP 3. 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 electric motor switch from "LOCK" (OFF) position to "ON" position.
(3)On completion, check that the diagnosis code is reset.
Q.
Is the diagnosis code set?
Replace the combination meter. After replacing the ECU, carry out the CAN bus diagnostics.
Then go to Step 4.
A poor connection, open circuit or other intermittent malfunction is present in
the CAN bus lines between the combination meter and the ETACS-ECU (Refer to GROUP 00, How to
Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent
Malfunctions ).
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 electric motor switch from "LOCK" (OFF) position to "ON" position.
(3)On completion, check that the diagnosis code is not reset.
Q.
Is the diagnosis code set?
Replace the ETACS-ECU and register the ID codes (Refer to ).
After replacing the ECU, carry out the CAN bus diagnostics. Then go to Step 5.
A poor connection, open circuit or other intermittent malfunction is present in
the CAN bus lines between the combination meter 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.
Recheck if the diagnosis code is set to the ETACS-ECU.
(1)Erase the diagnosis code.
(2)Turn the electric motor switch from "LOCK" (OFF) position to "ON" position.
(3)On completion, check that the diagnosis code is reset.
Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting 
).
On completion, go to Step 5.