OSC_TCC in Drive Mode
WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
This function is used to test whether the torque converter clutch is locking and unlocking correctly.
The OSC functions for the TCC parameter allows the technician to choose the following:
- NORMAL - Allows the PCM to control the TCC normally.
- LOCK - Commands TCC solenoid ON (100% duty cycle) to engage the converter clutch.
- UNLOCK - Commands TCC solenoid OFF (0% duty cycle) to disengage the converter clutch.
The vehicle requirements must be met when sending the OSC value for OSC_TCC. If the vehicle requirements are not met when sending the OSC value, the command will be canceled. When the command is canceled, OSC is aborted and must be restarted. After the OSC value for OSC_TCC is sent, if the vehicle requirements are no longer met, the OSC value will be canceled by the PCM (monitoring corresponding PID).
The vehicle requirements for SENDING the OSCTCC value LOCK is as follows:
- Engine is running
- Gear selector is in Overdrive (Circle D)
- Vehicle speed is greater than 3 km/h (2 mph)
- Transmission fluid temperature (TFT) is between 16°C (60°F) and 116°C (240°F)
- Brake is off when vehicle speed is below 32 km/h (20 mph)
- Not an excessive load on the engine
- Not during an upshift or downshift
- Engine speed is greater then 1,500 RPM
The vehicle requirements for SENDING the OSC_TCC value UNLOCK is as follows:
- Engine is running
- The selector lever is in Overdrive (Circle D)
- Vehicle speed is greater than 3 km/h (2 mph)