Monitor DTC Status

U0001 Can Communication BUS Off

Scantool Diagnostics - Monitor Scantool Data

Monitor Scantool Data

1. Connect scantool to data link connector (DLC)
2. Engine "ON".
3. Monitor the "CAN COMMUNICATION SERVICE DATA (ENGINE RPM, VEHICLE SPEED SENSOR, THROTTLE P. SENSOR)" parameters on the scantool
4. Compare it with referance data as below




5. Does "CAN BUS LINE DATA" follow the referance data?
YES
1) Fault is intermittent caused by poor contact in the sensor's and/or PCM/TCM's connector or was repaired and PCM/TCM memory was not cleared. And go to Verification of Vehicle Repair procedure.
NO
1) Substitute with a known-good PCM/TCM and check for proper operation. If the problem is corrected, replace PCM/TCM as necessary and then go to "Verification of Vehicle Repair" procedure.