Code No.U0100:
Engine CAN Timeout
caution |
- If diagnosis code No.U0100 is set, be sure to diagnose
the CAN main bus line.
- When replacing the ECU, always check that the communication circuit is normal.
|
DIAGNOSTIC FUNCTION
If signals from the engine-ECU transmitted via CAN bus line cannot be received, diagnosis
code No.U0100 is set.
note |
When diagnosis code No. U0100 is set, the e-Call switch flashes in green.
|
PROBABLE CAUSES
- Damaged wiring harness or connector
- Malfunction of the engine-ECU
- Malfunction of e-Call control unit
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III CAN bus diagnosis
- Use M.U.T.-III to perform CAN bus line diagnosis.
Q.
Is the check result normal?
Go to Step 2.
Repair CAN bus line (Refer to GROUP 54C - Troubleshooting - CAN
Bus Diagnostics Table
).
STEP 2. Use M.U.T.-III to confirm a diagnosis code of other systems.
Check that the other ECU performing CAN communication with engine-ECU sets diagnosis code
No.U0100, No.U1100.
Q.
Is 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 e-Call control unit.
|
(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 engine-ECU (Refer to GROUP 13B - Engine-ECU <6B3> or
GROUP 13C - Engine-ECU <4N1>).
Intermittent malfunction in CAN bus line between e-Call control unit and engine-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 set again.
Check again if the diagnosis code is set in the e-Call control unit.
|
(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 e-Call control unit (Refer to
).
Intermittent malfunction in CAN bus line between e-Call control unit and engine-ECU (Refer
to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How
to Cope with Intermittent Malfunctions).