Chrysler
Type:
    Powertrain - Transmission - ISO/SAE Controlled
Description:
    Torque Converter Clutch Circuit Conditions
Cause:
    No PCM or TCM codes set, vehicle in 3rd gear with TCC unlocked for 10 seconds, VSS less than 70 mph, throttle applied to 1/3 open until the TCC locks, TCC locked for 5 seconds, then test started and the PCM detected that the engine speed (RPM) did not drop with the TCC engaged

Generic
Type:
    Powertrain - Transmission - ISO/SAE Controlled
Description:
    Torque Converter Clutch Circuit/Open

GM
Type:
    Powertrain - Transmission - ISO/SAE Controlled
Description:
    TCC Enable Circuit Electrical (4L60-E Transmission)
Cause:
    Engine speed over 450 rpm for 5 seconds, system voltage from 10-18v, Fuel Cutoff not active, then the VCM detected one of the following conditions for 5 seconds Condition 1: TCC solenoid commanded on and voltage feedback remained high Condition 2: TCC solenoid commanded off and voltage feedback remained low

Nissan
Type:
    Powertrain - Transmission - ISO/SAE Controlled
Description:
    Torque converter clutch solenoid - voltage low
Cause:
    Wiring, clutch solenoid, TCM