Code No.U0245
Audio visual navigation unit CAN timeout
caution
If the diagnosis
code No. U0245 is set to the ETACS-ECU, always diagnose the CAN bus line.
Before replacing the ECU, ensure that the communication circuit is normal.
DIAGNOSTIC FUNCTION
When the signals from CAN box unit (audio visual navigation unit) cannot be received,
the ETACS-ECU sets the diagnosis code No. U0245.
JUDGMENT CRITERIA
After the following statuses continue to be true for 5 seconds, if the communication with
the CAN box unit (audio visual navigation unit) be established for 2,500 ms or more, the ETACS-ECU
determines that a problem has occurred.
No abnormality is present to the network.
Ignition switch is in the ON position.
No abnormality is present to the power supply fuse, or the odometer value is at
80.5 km or more.
ETACS-ECU system voltage is at 10-16 V.
PROBABLE CAUSES
Malfunctions of CAN box unit
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 ).
STEP 2. M.U.T.-III other system diagnosis code
Check if diagnosis code is set to the audio visual navigation unit.
Q.
Is the diagnosis code set?
Perform the diagnosis code troubleshooting to the audio visual navigation unit.
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 ignition switch from "LOCK" (OFF) position to "ON" position.
(3)Check if diagnosis code is set.
Q.
Is the diagnosis code set?
Replace the CAN box unit (audio visual navigation unit), then go to Step 4.
The trouble can be an intermittent malfunction such as a poor connection or open
circuit in the CAN bus lines between the CAN box unit (audio visual navigation unit) and the
ETACS-ECU (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 reset.
Check again if the diagnosis code is set to the ETACS-ECU.
(1)Erase the diagnosis code.
(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3)Check if diagnosis code is set.
Q.
Is the diagnosis code set?
Replace the ETACS-ECU.
The trouble can be an intermittent malfunction such as a poor connection or open
circuit in the CAN bus lines between the CAN box unit (audio visual navigation unit) and the
ETACS-ECU (Refer to GROUP 00 -
How to Use Troubleshooting/Inspection Service Points -
How
to Cope with Intermittent Malfunction ).
Repair the CAN bus line (Refer to GROUP 54C -
Troubleshooting 
).