P1630

P1630 Can Communication Bus Off

Component Location






General Description

The TCM can either receive data from the Engine Control Module or ABS control module, or it can send data to the ECM and ABSCM by using CAN communication. The CAN communicaton is one of the vehicle communications method, which is now widely used to transfer the vehicle data.

DTC Description

The TCM reads data on the CAN-BUS line and checks whether the data is equal to the data which the TCM sent before. If the data is not the same the TCM decides that either the CAN-BUS line or TCM are malfuncting and sets this code.

DTC Detecting Condition






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. GP. 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) Go to "W/Harness Inspection" procedure.


Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.

2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.

3. Has a problem been found?

YES

1) Repair as necessary and go to "Verification vehicle Repair" procedure.

NO

1) Go to "Signal circuit inspection" procedure.


Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.

1. Connect scan tool and select "Diagnostic Trouble Codes (DTCs)" mode.

2. Using a scantool, Clear DTC.

3. Operate the vehicle within DTC Enable conditions in General information.

YES

1) Go to the applicable troubleshooting procedure.

NO

1) System performing to specification at this time.