Drive Test - Torque Converter Clutch Control

The OSC values for TCC_OSC to engage or disengage the TCC are as follows:

• 0 - PCM in normal control of TCC and OSC is cancelled
• 1 or OFF - Commands PCM to keep the torque converter clutch from engaging
• 2 or ON - Commands PCM to engage the TCC using a normal ramp rate
• 3 or ON - Commands PCM to engage the TCC using a fast ramp rate

Controlling the TCC will assist the technician in testing the operation of the torque converter for engagements and disengagements. Also, the technician may find it easier to evaluate upshifts and downshifts by first using OSC to keep the TCC from engaging.

Vehicle requirements when using TCC_OSC - Controlling the TCC.

When SENDING the TCC_OSC value [1 or OFF], the engine must be running with the transaxle in the DRIVE position and the vehicle speed must be greater than 5 km/h (3 mph).

When SENDING the TCC_OSC value [2 or 3 or ON], the engine must be running with the selector lever in the DRIVE position, transaxle in 3rd, 4th, 5th or 6th gear, transaxle temperature between 4°C (40°F) and 121°C (250°F), the vehicle speed must be below 24 km/h (15 mph) and engine speed greater than 1,100 rpm with minimal engine load.