P0740

Symptom:
P0740-TORQUE CONVERTER CLUTCH CONTROL CIRCUIT

Test 1:

Test 2-5:

When Monitored:
The Torque Converter Clutch (TCC) is in FEMCC or PEMCC, Transmission temperature is hot, Engine temperature is greater than 38°C or 100°F. Transmission Input Speed greater than 1750 RPM, TPS less than 30°.

Set Condition:
The TCC is modulated by controlling the duty cycle of the L/R Solenoid until the difference between the Engine and the Transmission Input Speed RPM or duty cycle is within a desired range. The DTC is set after the period of 10 seconds and 3 occurrences of either: FEMCC - with slip greater than 100 RPM or PEMCC - duty cycle greater than 85%.

POSSIBLE CAUSES
- RELATED DTC'S PRESENT
- INTERNAL TRANSMISSION
- INTERMITTENT WIRING AND CONNECTORS