P1780

DTC P1780 Torque Control Signal Failure

Component Location:

General Description
Many control units is applied to the vehicle due to vehicle to be electronic control type and these perform many controls by receiving signals from sensors. So the common use of each sensors and the need of common informations became a prominent figure. CAN communication method is used at power train (ABS, transmission, engine, ECS etc) control of vehicle because it withstands electronic external noise by spark and can high-speed communication. Though CAN communication, ECM and TCM hold engine RPM, APS, step of transmission, decreasing of torque in common and perform the active control.

DTC Detecting Condition:

Schematic Diagram:

DTC Description
This code is set, if ITM-ECU detects invalid engine information like engine displacement, torque. If failure is detected TCCU prohibits the ITM control and cuts the current to control coil.

Monitor DTC Status
1. Connect scantool to Data Link Connector (DLC).
2. Warm up the engine to normal operating temperature.





3. Monitor DTC (Diagnostics Trouble Code) on the scantool.
4. Is the same DTC displayed again?

YES
1) Check engine information.
2) Repair or replace as necessary and go to "Verification of vehicle Repair" procedure below.

NO
1) Fault is intermittent caused by poor contact in the sensor's and/or TCCU's connector or was repaired and TCCU memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of vehicle Repair" procedure below.

Verification of Vehicle Repair
After a repair, it is essential to verifying that the fault has been corrected.
1. Connect scan tool and select "Diagnostic Trouble Codes (DTCs)" mode.
2. Using 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 is performing to specification at this time.