CAN Communication Circuit Check: List
WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.
- Power unit CAN
Resistance value between CAN Hi and Lo Contents of inspection Remarks Ground short inspection Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>CHECK FOR SHORT TO GROUND (POWER UNIT CAN) Shorted to ground in the communication circuit or control module. Check power supply short Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>CHECK FOR SHORT TO POWER SUPPLY (POWER UNIT 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)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>MORE THAN 52 Ω AND LESS THAN 62 Ω (POWER UNIT 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)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION > 52 Ω OR LESS (POWER UNIT 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)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION > 62 Ω OR MORE (POWER UNIT 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 (TCM) Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω (POWER UNIT CAN_TCM) No TCM 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)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω (POWER UNIT CAN_VDC) No VDC data is received. Perform inspection when faulty is detected. Related lines, more than 52 Ω and less than 62 Ω (electric brake booster) Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω (POWER UNIT CAN_ELECTRIC BRAKE BOOSTER) No brake data is received. Perform inspection when faulty is detected. Related lines, more than 52 Ω and less than 62 Ω (electronically-controlled damper) Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω (POWER UNIT CAN_ELECTRONICALLY-CONTROLLED DAMPER) No electronically-controlled damper 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)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω (POWER UNIT CAN_RAB) No RAB 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)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω (POWER UNIT CAN_STEREO CAMERA) No stereo camera data is received. Perform inspection when faulty is detected. - (I) Power unit 2 CAN
Resistance value between CAN Hi and Lo Contents of inspection Remarks Ground short inspection Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>CHECK FOR SHORT TO GROUND ((I) POWER UNIT 2 CAN) Shorted to ground in the communication circuit or control module. Check power supply short Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>CHECK FOR SHORT TO POWER SUPPLY ((I) POWER UNIT 2 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)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>MORE THAN 52 Ω AND LESS THAN 62 Ω ((I) POWER UNIT 2 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)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION > 52 Ω OR LESS ((I) POWER UNIT 2 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)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION > 62 Ω OR MORE ((I) POWER UNIT 2 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 (TCM) Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω ((I) POWER UNIT 2 CAN_TCM) No TCM data is received. Perform inspection when faulty is detected. - (G) Chassis CAN
Resistance value between CAN Hi and Lo Contents of inspection Remarks Ground short inspection Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>CHECK FOR SHORT TO GROUND ((G) CHASSIS CAN) Shorted to ground in the communication circuit or control module. Check power supply short Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>CHECK FOR SHORT TO POWER SUPPLY ((G) CHASSIS 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)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>MORE THAN 52 Ω AND LESS THAN 62 Ω ((G) CHASSIS 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)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION > 52 Ω OR LESS ((G) CHASSIS 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)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION > 62 Ω OR MORE ((G) CHASSIS 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 (power steering) Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω ((G) CHASSIS 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 (electric brake booster) Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω ((G) CHASSIS CAN_ELECTRIC BRAKE BOOSTER) No brake 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)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω ((G) CHASSIS CAN_AIRBAG) No airbag 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)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω ((G) CHASSIS 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 (TPMS & keyless entry, TPMS or keyless entry) Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω ((G) CHASSIS CAN_TPMS & KEYLESS ENTRY, TPMS OR KEYLESS ENTRY) No map locator data is received. Perform inspection when faulty is detected. - Body CAN
Resistance value between CAN Hi and Lo Contents of inspection Remarks Ground short inspection Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>CHECK FOR SHORT TO GROUND (BODY CAN) Shorted to ground in the communication circuit or control module. Check power supply short Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>CHECK FOR SHORT TO POWER SUPPLY (BODY 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)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>MORE THAN 52 Ω AND LESS THAN 62 Ω (BODY 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)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION > 52 Ω OR LESS (BODY 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)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION > 62 Ω OR MORE (BODY 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 (body integrated unit) Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω (BODY CAN_BODY INTEGRATED UNIT) No body integrated data is received. Perform inspection when faulty is detected. Related lines, more than 52 Ω and less than 62 Ω (headlight beam leveler) Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω (BODY CAN_HEADLIGHT BEAM LEVELER) No headlight beam leveler data is received. Perform inspection when faulty is detected. Related lines, more than 52 Ω and less than 62 Ω (combination meter) Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω (BODY CAN_COMBINATION METER) No meter data is received. Perform inspection when faulty is detected. Related lines, more than 52 Ω and less than 62 Ω (keyless access) Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω (BODY CAN_KEYLESS ACCESS) No keyless access Control Module data is received. Perform inspection when faulty is detected. Related lines, more than 52 Ω and less than 62 Ω (rear view mirror) Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω (BODY CAN_REAR VIEW MIRROR) Perform inspection when rear view mirror malfunction is detected. Related lines, more than 52 Ω and less than 62 Ω (immobilizer) Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω (BODY CAN_IMMOBILIZER) No seat memory data is received. Perform inspection when faulty is detected. Related lines, more than 52 Ω and less than 62 Ω (A/C) Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω (BODY CAN_A/C) No air conditioner data is received. Perform inspection when faulty is detected. - (H) Advanced safety CAN
Resistance value between CAN Hi and Lo Contents of inspection Remarks Ground short inspection Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>CHECK FOR SHORT TO GROUND ((H) ADVANCED SAFETY CAN) Shorted to ground in the communication circuit or control module. Check power supply short Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>CHECK FOR SHORT TO POWER SUPPLY ((H) ADVANCED SAFETY 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)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>MORE THAN 52 Ω AND LESS THAN 62 Ω ((H) ADVANCED SAFETY 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)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION > 52 Ω OR LESS ((H) ADVANCED SAFETY 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)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION > 62 Ω OR MORE ((H) ADVANCED SAFETY 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 (radar sensor LH) Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω ((H) ADVANCED SAFETY CAN_RADAR SENSOR LH) No radar sensor LH 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)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω ((H) ADVANCED SAFETY 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 (stereo camera) Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω ((H) ADVANCED SAFETY 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 (EyeSight assist monitor) Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω ((H) ADVANCED SAFETY CAN_EYESIGHT ASSIST MONITOR) No EyeSight assist monitor data is received. Perform inspection when faulty is detected. - (J) Vehicle external connection CAN
Resistance value between CAN Hi and Lo Contents of inspection Remarks Ground short inspection Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>CHECK FOR SHORT TO GROUND ((J) VEHICLE EXTERNAL CONNECTION CAN) Shorted to ground in the communication circuit or control module. Check power supply short Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>CHECK FOR SHORT TO POWER SUPPLY ((J) VEHICLE EXTERNAL CONNECTION 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)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>MORE THAN 52 Ω AND LESS THAN 62 Ω ((J) VEHICLE EXTERNAL CONNECTION 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)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION > 52 Ω OR LESS ((J) VEHICLE EXTERNAL CONNECTION 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)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION > 62 Ω OR MORE ((J) VEHICLE EXTERNAL CONNECTION 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 (cockpit control) Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω ((J) VEHICLE EXTERNAL CONNECTION CAN_COCKPIT CONTROL) No AUDIO VISUAL NAVIGATION 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)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω ((J) VEHICLE EXTERNAL CONNECTION CAN_TELEMATICS) No telematics data is received. Perform inspection when faulty is detected. Related lines, more than 52 Ω and less than 62 Ω (OP connector (remote engine start)) Ref. to LAN SYSTEM (DIAGNOSTICS)>CAN COMMUNICATION CIRCUIT CHECK>INSPECTION>RELATED LINES, MORE THAN 52 Ω AND LESS THAN 62 Ω ((J) VEHICLE EXTERNAL CONNECTION CAN_OP CONNECTOR (REMOTE ENGINE START)) Perform inspection when the remote engine starter does not operate, while the mobile key side operates normally.