P0740

Tests 1 - 2:

Tests 3 - 7:

SYMPTOM
P0740 - TORQUE CONVERTER CLUTCH, NO RPM DROP AT LOCKUP

WHEN MONITORED
Continuously when no matured or maturing Trouble Code and throttle position > 10% and constant for 4.4 seconds before TCC engagement requested: No TCC solenoid circuit, any cam/crank-related code, VSS, any TPS-related code and Battery voltage > 11.0 volts

SET CONDITION
Torque Converter malfunctions that are detected are the FTC not locking up properly when desired, and the torque converter not unlocking properly when desired. 3 consecutive test failures over one trip will store the code. 2 bad trips will set the code.

POSSIBLE CAUSES
- Fused ignition switch output circuit open
- DIFF shaft, or gears defective
- TCC solenoid defective
- Torque converter assembly defect or TCC solenoid stuck
- Transmission fluid dirty or level low
- Vehicle configuration non-standard