SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSSUBARU2014FORESTER 2.5I, ENG CD FB25BA, STANDARD TRANSREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESLAN SYSTEM (DIAGNOSTICS)CAN COMMUNICATION CIRCUIT CHECKPROCEDUREWIRING DIAGRAM
2014 Subaru Forester 2.5i, Eng CD FB25BA, Standard Trans

CAN Communication Circuit Check: Procedure: Wiring Diagram

2014 Subaru Forester 2.5i, Eng CD FB25BA, Standard TransSECTION Wiring Diagram

CAN communication system < Ref. to WIRING DIAGRAM , CAN Communication System. >

  • Non-turbo model
    Fig 1: CAN Communication Wiring Diagram (Non-Turbo Model)
    G09485238Courtesy of SUBARU OF AMERICA, INC.
  • Turbo model
    Fig 2: CAN Communication Wiring Diagram (Turbo Model)
    G09485239Courtesy of SUBARU OF AMERICA, INC.
Step Check Yes No
1 CHECK BASIC DIAGNOSTIC PROCEDURE  .
Check if the basic diagnostic procedure was performed up to STEP 3.
NOTE: The above-mentioned step can easily narrow down a fault part by the inspection with SSM, before performing "Inspection of CAN communication circuit" using a circuit tester.
 Was the basic diagnostic procedure performed? Go to step 2  . Perform the basic diagnostic procedure. < Ref. to PROCEDURE , Basic Diagnostic Procedure. >
2 CHECK FROM DATA LINK CONNECTOR  .
Using the tester, measure the resistance between terminals.
Connector & terminal 
(B40) No. 6 - Chassis ground: 
(B40) No. 14 - Chassis ground: 		 Is the resistance 10 Ω or less? Check for ground short. < Ref. to GROUND SHORT INSPECTION , INSPECTION, CAN Communication Circuit Check. > Go to step 3  .
3 CHECK FROM DATA LINK CONNECTOR  .
  1. Turn the ignition switch to ON.
  2. Using the tester, measure the voltage between terminals.

    Connector & terminal 

    (B40) No. 6 - Chassis ground: 

    (B40) No. 14 - Chassis ground: 

 Is the voltage 5 V or less? Go to step 4  . Check for battery short. < Ref. to BATTERY SHORT INSPECTION , INSPECTION, CAN Communication Circuit Check. >
4 CHECK FROM DATA LINK CONNECTOR  .
  1. Turn the ignition switch to OFF.
  2. Using the tester, measure the resistance between terminals.

    Connector & terminal 

    (B40) No. 6 - No. 14: 

 Is the resistance 52 Ω or less? Perform the inspection for the resistance of 52 Ω or less. < Ref. to 52 Ω OR LESS , INSPECTION, CAN Communication Circuit Check. > Go to step 5  .
5 CHECK FROM DATA LINK CONNECTOR  .
Using the tester, measure the resistance between terminals.
Connector & terminal 
(B40) No. 6 - No. 14: 		 Is the resistance 62 Ω or more? Perform the inspection for the resistance of 62 Ω or more. < Ref. to 62 Ω OR MORE , INSPECTION, CAN Communication Circuit Check. > If the display of CAN system U-code disappears from the current malfunction, the CAN network is currently normal. If the U-code has detected as current malfunction, related lines may be open. Perform the inspection for the related line corresponding to the detected DTC. < Ref. to LIST , CAN Communication Circuit Check. >
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.