TCC Overtemp

(P0740) TCC OVERTEMP





When Monitored and Set Condition
- When Monitored: Solenoid supply active. No Input Speed Sensor N2 - N3, CAN Bus, PCM, CAN Engine, CAN Engine Speed DTCs present. Torque Converter Clutch in slip mode.
- Set Condition: Friction loss factor reaches threshold.

POSSIBLE CAUSES
- INTERNAL TRANSMISSION

Diagnostic Test
1. PRE-DIAGNOSTIC CHECK OUT





Note: Low fluid level can be the cause of many transmission problems. If the fluid level is low, locate and repair the leak then check and adjust the fluid level in accordance with the Service Information.

Note: Always perform diagnostics with a fully charged battery to avoid false symptoms.
With the DRB III*, read the engine DTCs. Check and repair all engine DTCs prior to performing transmission symptom diagnostics.
With the DRB III*, read and record all Transmission DTCs.

Note: Check connectors - Clean/repair as necessary. Poor pin to terminal connections can set DTCs.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Repair as necessary.
Most DTCs set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run.

Note: Verify flash level of transmission controller. Some problems are corrected by software upgrades to the transmission controller.

Note: Check for any Technical Service Bulletins that may apply.

Perform this procedure prior to Symptom diagnosis.
Continue
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2. INTERNAL TRANSMISSION
This DTC is an informational DTC.
Check for any Technical Service Bulletins or Controller updates that may apply.
This is usually a sign of TCC failure or internal transmission problems.
Check the Engine and Transmission Cooling Systems for proper operation.
View repair.
Repair >> Repair internal Transmission as necessary. Refer to the Service Information for proper repair procedure.