TCC in DRIVE MODE:

This OSC function is used to test whether the torque converter clutch is engaging and disengaging correctly.

The OSC functions for the TCC parameter allows the technician to choose the following:

• TCC - activates TCC OFF and ON.
• ON - turns TCC solenoid ON.
• OFF - turns TCC solenoid OFF.

OSC "TCC OFF" DRIVE MODE Operates ONLY when:

• VSS and digital TR sensors are operational.
• No VSS and digital TR sensor DTCs present.
• Engine ON.
• Transmission range selector lever in O/D.
• Vehicle speed is greater than 2 mph.

OSC "TCC ON" DRIVE MODE Operates ONLY when:

• VSS and digital TR sensors are operational.
• No VSS and digital TR sensor DTCs present.
• Engine on.
• Transmission range selector lever in O/D.
• Vehicle speed is greater than 2 mph.
• Transmission in 2nd gear or higher.
• TFT is between 60°F and 275 °F.
• Brake not applied "OFF" below 20 mph.
• Not an excessive load on engine (engine lugging).

OSC Command Values

• OFF - turns TCC OFF.
• ON - turns TCC ON.
• XXX - cancels OSC value sent.
• SEND - sends the values to PCM.