P1764

P1764 TCU Can Mi-Com Malfunction

Component Location





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.

Description

Without CAN communication, an independent pin and wiring is needed to receive a sensor information from a TCM. The more information to be communicated, the more wirings is required. In case of CAN communication type, all the information need to be communicated among control modules such as TCM and ABS control module use CAN lines. If the TCM detects out of signal in communication line, the DTC will be set.

DTC Description

When the TCM judges that the CAN micro-computer , which is installed inside the TCM, is malfunctioning,the TCM 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 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) Replace TCM and then go to "Verification 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.

YES

1) Go to the applicable troubleshooting procedure.

NO

1) System performing to specification at this time.