Diagnostic Trouble Code Descriptions

DESCRIPTION
The torque converter clutch (TCC) solenoid is a Pulse Width Modulating (PWM) style solenoid. The PWM solenoid is used to control the apply and release of the bypass clutch in the torque converter. By modulating the pulse width of the TCC solenoid the pressure in the S4 circuit varies modulating the apply and release of the bypass clutch in the torque converter.

SYMPTOMS
- Failed ON-Engine stalls in manual 2nd. Engine lugging, poor performance at low engine speeds, harsh shifts.
- Failed OFF-Poor fuel economy, overheating, TCC will not engage.

DTC's
P0741**: TCC Engagement Error
P0743*: TCC Solenoid Circuit Failure During On-Board Diagnostics
P1741**: Continuous Slip Error
P1742**: TCC Solenoid Failed ON (California Only)
P1743**: TCC Solenoid Failed ON (California Only)
P1744**: TCC Excessive Slip Detected (California Only)

** May also be generated by other NON-electronic related transmission hardware conditions.
* Output circuit check, generated only by an electrical condition.