DTC U0293 Lost Communication with HV ECU
Monitor description
The Controller Area Network (CAN) is a serial data communication system for real-time application. It is a multiplex communication system designed for on-vehicle use that provides a superior communication speed of 500 kbps and a capability to detect malfunctions. Through the combination of the CANH and CANL bus lines, the CAN is able to maintain communication based on differential voltage.
| DTC No. | DTC Detection Condition | Trouble Area |
| U0293 | Communication with power management control ECU is interrupted (1 trip detection logic). |
|
Monitor strategy
| Frequency of Operation | Continuous |
Confirmation driving pattern
- Connect the intelligent tester to the DLC3.
- Turn the power switch on (IG) and turn the tester on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation).
- Turn the power switch off and wait for 30 seconds.
- Turn the power switch on (IG) and turn the tester on.
- Wait 5 seconds or more.
- Enter the following menus: Powertrain / Engine and ECT / DTC.
- Read the pending DTCs.
HINT:
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
- Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
- Input the DTC: U0293.
- Check the DTC judgment result.
Tester Display Description NORMAL - DTC judgment completed
- System normal
ABNORMAL - DTC judgment completed
- System abnormal
INCOMPLETE - DTC judgment not completed
- Perform driving pattern after confirming DTC enabling conditions
UNKNOWN - Unable to perform DTC judgment
- Number of DTCs which do not fulfill DTC preconditions has reached ECU's memory limit
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
Wiring diagram
Inspection procedure
Refer to the CAN Communication System .