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 MANUALSSUBARU2022IMPREZA BASE, 4D SEDAN, AUTOMATIC CVT TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 3 (LAN COMMUNICATION SYSTEM (DIAGNOSTICS) (HEV))CAN COMMUNICATION CIRCUIT CHECKLISTMAIN-CAN
2022 Subaru Impreza Base, 4D Sedan, Automatic CVT Trans
CAN Communication Circuit Check: List: Main-Can
2022 Subaru Impreza Base, 4D Sedan, Automatic CVT TransSECTION Main-Can
WARNING: This page is about a different car, the 2022 Subaru Crosstrek. However, it is still accessible from the selected car via links, so may be relevant.
| Resistance value between CAN Hi and Lo | Contents of inspection | Remarks |
|---|---|---|
| Ground short inspection | Ref. to LAN SYSTEM (DIAGNOSTICS) (HEV)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>GROUND SHORT INSPECTION (MAIN-CAN) . | Shorted to ground in the communication circuit or control module. |
| Check power supply short | Ref. to LAN SYSTEM (DIAGNOSTICS) (HEV)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>POWER SHORT INSPECTION (MAIN-CAN) . | Shorted to battery power supply in the communication circuit or control module. |
| More than 52 Ω and less than 62 Ω | Ref. to LAN SYSTEM (DIAGNOSTICS) (HEV)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>MORE THAN 52 Ω AND LESS THAN 62 Ω (MAIN-CAN) . | Combined resistance of end resistance does not have malfunction; short to ground or +B short of the CAN communication circuit is possible, however. |
| 52 Ω or less | Ref. to LAN SYSTEM (DIAGNOSTICS) (HEV)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>52 Ω OR LESS (MAIN-CAN) . | Resistance is lower than combined resistance of end resistance. Short to CAN Hi and CAN Lo on the CAN communication circuit is possible. |
| 62 Ω or more | Ref. to LAN SYSTEM (DIAGNOSTICS) (HEV)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>62 Ω OR MORE (MAIN-CAN) . | Resistance is higher than combined resistance of end resistance. Open circuit of CAN communication circuit is possible. |
| Related lines, more than 52 Ω and less than 62 Ω (AWD) | Ref. to LAN SYSTEM (DIAGNOSTICS) (HEV)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω (MAIN-CAN_AWD) . | No AWD data is received. Perform inspection when faulty is detected. |
| Related lines, more than 52 Ω and less than 62 Ω (power steering) | Ref. to LAN SYSTEM (DIAGNOSTICS) (HEV)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω (MAIN-CAN_POWER STEERING) . | No power steering data is received. Perform inspection when faulty is detected. |
| Related lines, more than 52 Ω and less than 62 Ω (VDC) | Ref. to LAN SYSTEM (DIAGNOSTICS) (HEV)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω (MAIN-CAN_VDC) . | No VDC data is received. Perform inspection when faulty is detected. |
| Related lines, more than 52 Ω and less than 62 Ω (steering angle sensor) | Ref. to LAN SYSTEM (DIAGNOSTICS) (HEV)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω (MAIN-CAN_STEERING ANGLE SENSOR) . | No steering angle sensor data is received. Perform inspection when faulty is detected. |
| Related lines, more than 52 Ω and less than 62 Ω (airbag) | Ref. to LAN SYSTEM (DIAGNOSTICS) (HEV)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω (MAIN-CAN_AIRBAG) . | No airbag data is received. Perform inspection when faulty is detected. |
| Related lines, more than 52 Ω and less than 62 Ω (stereo camera) | Ref. to LAN SYSTEM (DIAGNOSTICS) (HEV)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω (MAIN-CAN_STEREO CAMERA) . | No stereo camera data is received. Perform inspection when faulty is detected. |
| Related lines, more than 52 Ω and less than 62 Ω (telematics) | Ref. to LAN SYSTEM (DIAGNOSTICS) (HEV)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω (MAIN-CAN_ TELEMATICS) . | No telematics data is received. Perform inspection when faulty is detected. |
| Related lines, more than 52 Ω and less than 62 Ω (BSD/RCTA) | Ref. to LAN SYSTEM (DIAGNOSTICS) (HEV)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω (MAIN-CAN_BSD/RCTA) . | No Blind Spot Detection/Rear Cross Traffic Alert data is received. Perform inspection when faulty is detected. |
| Related lines, more than 52 Ω and less than 62 Ω (RAB) | Ref. to LAN SYSTEM (DIAGNOSTICS) (HEV)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω (MAIN-CAN_RAB) . | Perform inspection when no RAB data is received, or invalid data is detected. |
| Related lines, more than 52 Ω and less than 62 Ω (TPMS) | Ref. to LAN SYSTEM (DIAGNOSTICS) (HEV)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω (MAIN-CAN_TPMS) . | No TPMS data is received. Perform inspection when faulty is detected. |
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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.