P0741

Diagnostic Chart:

Schematic:

The torque converter clutch (TCC lockup) pressure control (PC) solenoid is used to apply and release the TCC. The TCC can be applied in 3rd, 4th and 5th gears. The TCC PC solenoid is normally closed. The transaxle control module (TCM) controls TCC by pulse width modulating an internal driver that pulls the solenoid circuit to ground. The TCM uses engine RPM and transaxle input speed sensor (ISS) to calculate the TCC Slip Speed. DTC P0741 sets when the TCC is commanded On, and the TCC Slip Speed is greater than 100 rpm.

DTC PARAMETERS
DTC P0741 sets if TCC is commanded ON, and the TCC Slip Speed is greater than 100 rpm when:
^ Ignition voltage is at least 10.5 volts
^ Transaxle is in a forward gear.
^ APP Angle is a least 20%
^ Engine Speed is not more than 4000 rpm
^ Condition exits for 12 seconds

DTC P0741 diagnostic runs continuously when the above conditions have been met.

DTC P0741 is a type A DTC.

DIAGNOSTIC AIDS

IMPORTANT: If DTC, P0717, P0727, P0963, or P0966 is set, diagnose that DTC first.

Observe ENGINE RPM and TRANSMISSION ISS with Scan tool. Compare with a known good vehicle to determine if the speed sensors are reading correctly.

Possible causes of TCC stuck OFF:
^ Shift solenoid 4 stuck open
^ TCC Lockup PC solenoid (SLU) stuck closed
^ Stuck valves in valvebody
^ Torque converter faulty
^ TCM

If the TCC Lockup PC solenoid is stuck closed, harsh 1-2, 2-1, and 3-2 shifts, and flare on 2-3 shift will result.