Engine Code

Test 1:

Tests 2 - 6:

Tests 7 - 9:

SYMPTOM
P0740-TORQUE CONVERTER CLUTCH, NO RPM DROP AT LOCKUP (3 SPEED AUTO TRANS)

WHEN MONITORED
Run in third with converter unlocked for 10 seconds, apply throttle until it locks then run for 5 seconds, vehicle speed less than 60 MPH. No DTCs set for: TCC solenoids, any CAM/crank conditions, VSS, TPS signal, TPS voltage too high or too low.

SET CONDITION
Torque converter malfunctions are detected when it does not lock or unlock properly. Two consecutive trips that fail will store the code. Mountainous terrain may cause this trouble code.

POSSIBLE CAUSES
- Intermittent condition
- DTCS present
- Transmission fluid
- Tire and wheel size
- Fused ignition output circuit
- TCC solenoid
- TCC assembly or TCC solenoid stuck
- TCC solenoid operation