P1631

P1631 No ID From ECU

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 communication is one of the vehicle communications
method, which is now widely used to transfer the vehicle data.

DTC Description

When the TCM cannot read the data from the ECM through the CAN-BUS line, the TCM sets this code. CAN-BUS circuit malfunctioning or ECM can be a possible cause of this DTC.

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 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.


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.

4. Are any DTCs present ?

YES

1) Go to the applicable troubleshooting procedure.

NO

1) System performing to specification at this time.