Convertible Top Diagnosis
DTC U1073 Bus OffCAUTION:
- If DTC U1073 is set, be sure to diagnose the CAN bus line.
- When replacing the ECU, always check that the communication circuit is normal.
DTC SET CONDITION
If the CAN circuit malfunction occurs, the convertible top control module sets DTC U1073.
PROBABLE CAUSES
Malfunction of CAN bus line
DIAGNOSIS
STEP 1. Recheck the DTC.
Q: Is DTC U1073 set?
YES : Go to Step 2.
NO : Intermittent malfunction (Refer to General (Body and Chassis) How to use Troubleshooting/inspection Service Points, How to Cope with Intermittent Malfunction).
STEP 2. Using scan tool MB991958, diagnose the CAN bus line.
Q: Is the check result normal?
YES : Intermittent malfunction (Refer to General (Body and Chassis) How to use Troubleshooting/inspection Service Points, How to Cope with Intermittent Malfunction).
NO : Repair the CAN bus line (Refer to Controller Area Network, Diagnosis).