DTC DETECTION LOGIC
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
U1000
CAN communication line
When ECM is not transmitting or receiving CAN communication signal of OBD (emission related diagnosis) for 2 seconds or more.
Harness or connectors
(CAN communication line is open or shorted)
U1001
When ECM is not transmitting or receiving CAN communication signal other than OBD (emission related diagnosis) for 2 seconds or more.
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
Turn ignition switch ON and wait at least 3 seconds.
Check DTC.
Is DTC detected?
YES
>>
Diagnosis Procedure
.
NO
>>
INSPECTION END
