If there is any problem in the CAN bus lines,
an incorrect diagnosis code may be set. Prior to this diagnosis, always diagnose the CAN bus
lines.
OPERATION
EV-ECU communicates with the combination meter via CAN.
DIAGNOSIS CODE SET CONDITIONS
When the CAN data cannot be received from the combination
meter, the diagnosis code No. U1108 will be set.
PROBABLE CAUSES
Damaged wiring harness or connector(s)
Malfunction of the combination meter system
ETACS-ECU malfunction
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III CAN bus diagnosis
Use the M.U.T.-III to diagnose the CAN bus lines.
Q.
Is the check result normal?
Go to Step 3.
Repair the CAN bus line. (Refer to GROUP 54C - Troubleshooting .)
Then go to Step 2.
STEP 2. Diagnosis code recheck after resetting CAN bus lines
Check again if the diagnosis code No. U1108 is set to the EV-ECU.
(1)Erase the stored diagnosis code.
(2)Set the electric motor switch from the LOCK (OFF) position to the ON position.
(3)Check if the diagnosis code is set.
Q.
Is the diagnosis code set?
Go to Step 3.
This diagnosis is complete.
STEP 3. Use M.U.T.-III to confirm a diagnosis code of other systems.
Check if the combination meter-related diagnosis code is set.
Q.
Is the diagnosis code set?
Carry out troubleshooting for the combination meter. (Refer to GROUP 54A - Combination
Meter- Diagnosis Code Chart .)
Go to Step 4.
STEP 4. M.U.T.-III Diagnosis code of other systems
Check if the diagnosis code No. U1108 is set to the ETACS-ECU.
Q.
Is the diagnosis code set?
Go to Step 5.
Go to Step 6.
STEP 5. Diagnosis code recheck
Check again if the diagnosis code is set to the EV-ECU.
(1)Erase the stored diagnosis code.
(2)Set the electric motor switch from the LOCK (OFF) position to the ON position.
(3)Check if the diagnosis code is set.
Q.
Is the diagnosis code set?
Replace the combination meter. (Refer to GROUP 54A - Combination Meter - Removal
and Installation .)
A poor connection, open circuit of the wiring harness or other intermittent malfunction
is present in the CAN bus line between the combination meter and EV-ECU (Refer to GROUP 00 - How
to Use Troubleshooting/Inspection Service Points, How to Handle Intermittent Malfunction)
STEP 6. Diagnosis code recheck
Check again if the diagnosis code is set to ETACS-ECU.
(1)Erase the stored diagnosis code.
(2)Set the electric motor switch from the LOCK (OFF) position to the ON position.
(3)Check if the diagnosis code is set.
Q.
Is the diagnosis code set?
Replace the EV-ECU. (Refer to .)
A poor connection, open circuit of the wiring harness or other intermittent malfunction
is present in the CAN bus line between the combination meter and EV-ECU (Refer to GROUP 00 - How
to Use Troubleshooting/Inspection Service Points, How to Handle Intermittent Malfunction)
Go to Step 3.
Repair the CAN bus line. (Refer to GROUP 54C - Troubleshooting 
.)
Then go to Step 2.