P0740

Test 1 Through 2:

Test 3 Through 7:

Test 8 Through 9:

Symptom:
P0740-TORQUE CONVERTER CLUTCH CONTROL CIRCUIT

When Monitored and Set Condition:
P0740-TORQUE CONVERTER CLUTCH CONTROL CIRCUIT

When Monitored:
During Partial Electronically Modulated Converter Clutch (PEMCC) operation.

Set Condition:
The trans must be in PEMCC, input speed greater than 1750 rpm. The TCC/L-R solenoid must achieve max duty cycle and NOT be able to pull the engine speed within 60 rpm of input speed. The code sets after 3 attempts at less than 30 deg of throttle angle.

POSSIBLE CAUSES
CHECKING SYMPTOMS AND POSSIBLE CAUSES
LOW BATTERY VOLTAGE
CODE P1784 ALSO PRESENT
NO PEMCC TO FEMCC TRANSITION DURING TIP IN
OIL PUMP BUSHING LOW PRESSURE
SOLENOID PACK ASSEMBLY L-R SOLENOID OPEN
VALVE BODY DEFECTIVE VALVE MECHANISM
INTERMITTENT CODE P0740