DTC U1202 Can-HS Bus Off: Trouble Symptom

CAN communication is not normal.

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK CAN COMMUNICATION CIRCUIT. Check CAN communication circuit. Refer to PROCEDURE .	Is CAN communication circuit faulty?	Repair the faulty portion, following the diagnosis procedure.	Go to step 2 .
2 CHECK DTC. Start the engine. Using the Subaru Select Monitor, read DTC of CAN system.	Is U1202 a current malfunction?	Go to step 3 .	It may be a temporary poor contact. Perform the clear memory.
3 CHECK CONTROL MODULE. Turn the ignition switch to OFF. Disconnect the control modules other than body integrated unit in order. NOTE: When disconnecting ECM or VDC CM, connect resistance of 120 Ω between CAN Hi and CAN Lo as an alternative of end resistance. Turn the ignition switch to ON. Using the Subaru Select Monitor, read DTC of CAN system.	Is there any control module that U1201 is not detected as current malfunction?	Replace the control module.	Repeat 1) to 4) in step 3 until U1202 is not detected.