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HOMESERVICE MANUALSSUBARU2014FORESTER 2.5I, ENG CD FB25BA, STANDARD TRANSREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESLAN SYSTEM (DIAGNOSTICS)DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)DTC U0073: CONTROL MODULE COMMUNICATION BUS "A" OFFTROUBLE SYMPTOM
2014 Subaru Forester 2.5i, Eng CD FB25BA, Standard Trans

DTC U0073: Control Module Communication Bus "A" Off: Trouble Symptom

2014 Subaru Forester 2.5i, Eng CD FB25BA, Standard TransSECTION Trouble Symptom

CAN communication is not normal.

DTC PROCEDURE

Step Check Yes No
1 CHECK PERFORMING OF BASIC DIAGNOSTIC PROCEDURE  . Was the basic diagnostic procedure performed up to step 8? Go to step 2  . Perform the basic diagnostic procedure. < Ref. to BASIC DIAGNOSTIC PROCEDURE . >
2 CHECK DTC  .
  1. Start the engine.
  2. Using the Subaru Select Monitor, read DTC of CAN system.
 Is U0073 a current malfunction? Go to step 3  . It may be a temporary poor contact. Perform the clear memory.
3 CHECK CAN COMMUNICATION CIRCUIT  .
Check CAN communication circuit. < Ref. to PROCEDURE , CAN Communication Circuit Check. >		 Is CAN communication circuit faulty? Repair the faulty portion, following the diagnosis procedure. Go to step 4  .
4 CHECK DTC  .
  1. Perform the inspection using the DTC check sheet. < Ref. to CHECK USING THE DTC CHECK SHEET , LIST, List of Diagnostic Trouble Code (DTC). >
  2. Using the Subaru Select Monitor, read DTC of CAN system.
 Is U0073 a current malfunction? Go to step 5  . System is normal.
5 CHECK CONTROL MODULE  .
  1. Turn the ignition switch to OFF.
  2. Disconnect the control modules other than body integrated unit in order.
    NOTE: When disconnecting ECM or VDC Control Module, connect resistance of 120 Ω between CAN Hi and CAN Lo as an alternative of end resistance.
  3. Turn the ignition switch to ON.
  4. Using the Subaru Select Monitor, read DTC of CAN system.
 Is there any control module that U0073 is not detected as current malfunction? Replace the control module. Repeat  1) to  4) in step 3 until U0073 is not detected.
RENDER: 1.0x

NO RELATED

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