Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSSUBARU2014IMPREZA SPORT LIMITEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 12 (LAN SYSTEM (DIAGNOSTICS) (HYBRID))CAN COMMUNICATION CIRCUIT CHECKPROCEDUREMAIN-CANNOTES
2014 Subaru Impreza Sport Limited
CAN Communication Circuit Check: Procedure: Main-Can: Notes
2014 Subaru Impreza Sport LimitedSECTION Notes
WARNING: This page is about a different car, the 2014 Subaru XV Crosstrek. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Also, even when the resistance value falls within approx. 53 - 61 Ξ©, related lines may be open if an error of communication for initializing or a CAN system U-code has occurred. (The resistance won't be between approx. 53 - 61 Ξ© if the main wiring harness is open.)
- When measuring the resistance of CAN communication circuit, measure it in sleep status.
To enter sleep status
- With ignition switch OFF and key or switch operation stopped, keep the doors, trunk, and rear gate all closed for one minute or more.
- On models with keyless access function, keep the access key 2 m or more away from the vehicle.
- When the bus line is measured, combined resistance of the end resistance (120 Ξ©) in ECM and the end resistance (120 Ξ©) in VDC Control Module can be measured. The combined resistance is supposed to be approximately 53 - 61 Ξ© with the stabilizing circuit included. If the measured resistance value becomes 52 Ξ© or less, main wiring harness or related lines may be shorted. Or, the combined resistance may have changed because of a resistance other than the end resistance created on the circuit. If the measured value is 62 Ξ© or more, there may be a malfunction such as open circuit in one of the end resistances, in the stabilizing circuit, or in the main wiring harness.
Also, even when the resistance value falls within approx. 53 - 61 Ξ©, related lines may be open if an error of communication for initializing or a CAN system U-code has occurred. (The resistance won't be between approx. 53 - 61 Ξ© if the main wiring harness is open.)
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.