DTC 69, Torque Converter Clutch (TCC) Stuck On (1994): Notes

The purpose of the automatic transmission Torque Converter Clutch (TCC) feature is to eliminate power loss of the torque converter stage when vehicle is in a cruise condition. This allows the convenience of the automatic transmission, and fuel economy of a manual transmission.

PCM/TCM commands the TCC PWM solenoid on by modulating TCC signal fluid acting on converter clutch shift valve. TCC fluid applies torque converter clutch.

DTC 69 will set when DTC(s) 21, 22, 28, 71 or 74 is not present, TCC is commanded off, TCC slip speed is between -5 and 10 RPM, TPS signal is greater than 25 percent, transmission range switch indicates "D3" or "D4", transmission is in 2nd or 3rd gear and all conditions are met for 2 seconds.

NOTE: Test number refers to number on diagnostic chart.

Test Number 1) This test checks mechanical state of TCC. When PCM/TCM commands TCC solenoid off, TCC slip speed should increase.