P2783-TORQUE CONVERTER TEMPERATURE TOO HIGH

For a complete wiring diagram Refer to Section 8W

Theory of Operation

The Transmission Control Module (TCM) monitors the friction loss of the torque converter clutch while it is in slipping mode. The TCM calculates friction loss using CAN communication signals such as, engine speed and engine torque, as well as the torque converter turbine speed computed by the TCM. Depending on the friction loss calculated in each program cycle, a corresponding value is added to a factor as long as the torque converter clutch is in slipping mode. The factor is set to 0 when the clutch is opened. If the factor reaches a specified value a DTC is set.

When Monitored:
When the solenoid supply voltage is active. With no reporting Input Speed Sensor 1 or 2 (N2 - N3), CAN Bus, PCM, CAN Engine, and/or CAN Engine Speed DTCs present. Torque Converter Clutch in slip mode.
Set Condition:
When the friction loss factor reaches threshold.

Possible Causes

INTERNAL TRANSMISSION OR TORQUE CONVERTER CLUTCH PROBLEM

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - NAG1 - STANDARD PROCEDURE)

Diagnostic Test

1. CHECK FOR AN INTERNAL TRANSMISSION PROBLEM

This DTC is an informational DTC.
Check for any Service Information Tune-ups or Technical Service Bulletins that may apply.
This is usually a sign of Torque Converter Clutch failure or an internal transmission problem.
Check the Engine and Transmission Cooling Systems for proper operation.

View repair.

Repair

Repair internal Transmission, Torque Converter, and/or Transmission and Engine Cooling systems as necessary. Refer to 21- AUTOMATIC - NAG1 for the appropriate service procedure(s).

Perform NAG1 TRANSMISSION VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - NAG1 - STANDARD PROCEDURE)