[ Model - ECLIPSE CROSS / Year - 2018 ]
2018 / ECLIPSE CROSS / EC - Workshop Manual
54 -CHASSIS ELECTRICAL > 54A-CHASSIS ELECTRICAL > ETACS > DIAGNOSIS CODE PROCEDURES > CODE No. U1073 BUS OFF
Code No.U1073 Bus off (CAN-C-Mid)
 
 
caution
  • If diagnosis code No.U1073 is set in the ETACS-ECU, diagnose the CAN bus (CAN-C-Mid) lines.
  • Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.
 
 
TROUBLE JUDGEMENT
If the ETACS-ECU detects a bus off error (CAN-C-Mid), diagnosis code No. U1073 will be set.
 
 
COMMENTS ON TROUBLE SYMPTOM
The ETACS-ECU or its CAN bus (CAN-C-Mid) lines may be defective.
 
 
PROBABLE CAUSES
  • Malfunction of the ETACS-ECU
  • Malfunction of wiring harness or connector
 
 
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-IIISE CAN bus diagnostics
Use the M.U.T.-IIISE to diagnose the CAN bus lines.
Is the check result normal?
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting ). On completion, go to Step 3.
 
STEP 2. Check whether the diagnosis code is set again.
Check again if the diagnosis code is set in the ETACS-ECU.
(1) Erase the diagnosis code.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3) On completion, check that the diagnosis code is set again.
Is the diagnosis code set?
Refer to GROUP 54C, Diagnosis Item 5 "Communication with no ECUs is possible (CAN-C-Mid)" , and Then go to Step 3.
If the trouble is solved, it is determined that there is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).
 
STEP 3. Check whether the diagnosis code is set again.
Recheck if the diagnosis code is set in the ETACS-ECU.
(1) Erase the diagnosis code.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3) Check if the diagnosis code is set again.
Is the diagnosis code set?
Replace the ETACS-ECU
The procedure is complete.