DTC U122C Can-HS SCU No-Receive Data: Wiring Diagram

CAN communication system. See appropriate SYSTEM WIRING DIAGRAM article.

Fig 1: CAN Communication System - Wiring Diagram

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Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK CAN COMMUNICATION CIRCUIT. Check CAN communication circuit. Refer to BUS "A" (MAIN-CAN) .	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 U122C a current malfunction?	Go to step 3 .	It may be a temporary poor contact. Perform the clear memory.
3 CHECK DTC. Turn the ignition switch to OFF. Install normal SCM from another vehicle to the faulty vehicle. Turn the ignition switch to ON. Using the Subaru Select Monitor, read DTC of CAN system.	Is U122C a current malfunction?	Replace the body integrated unit.	Refer to REMOVAL . Replace SCM. Refer to REMOVAL .