DTC U1073: Bus Off: Diagnosis
WARNING: This page is about a different car, the 2009 Mitsubishi Eclipse. However, it is still accessible from the selected car via links, so may be relevant.
Required Special Tools:
- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: Vehicle Communication Interface (V. C. I.)
- MB991827: M.U.T.-III USB Cable
- MB991910: M.U.T.-III Main Harness A
- STEP 1. Using scan tool MB991958, diagnose the CAN bus line. CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
- Connect scan tool MB991958 to the data link connector.
- Turn the ignition switch to the "ON" position.
- Diagnose the CAN bus line.
- Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the CAN bus line found to be normal?
YES : Go to Step 2.
NO : Repair the CAN bus line. Refer to CONTROLLER AREA NETWORK (CAN) . Then go to Step 3.
- STEP 2. Recheck for diagnostic trouble code.
Check again if the DTC is set.
- Turn the ignition switch to the "ON" position.
- Erase the DTC.
- Turn the ignition switch to the "LOCK" (OFF) position.
- Turn the ignition switch to the "ON" position.
- Check if the DTC is set.
- Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC U1073 set?
YES : Replace the hydraulic unit (integrated with TCL/ASC - ECU). Then go to Step 3.
NO : It can be assumed that this malfunction is intermittent. Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTIONS .
- STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set.
- Turn the ignition switch to the "ON" position.
- Erase the DTC.
- Turn the ignition switch to the "LOCK" (OFF) position.
- Turn the ignition switch to the "ON" position.
- Check if the DTC is set.
- Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC U1073 set?
YES : Go to Step 1.
NO : The procedure is complete.