Engine Controls - Tests W/codes - 7.4L: Specifications Chevrolet Suburban K1500

CODE 69, TORQUE CONVERTER CLUTCH STUCK ON 4L60-E TRANSMISSION

Control module commands TCC PWM solenoid on by modulating signal fluid on converter clutch shift valve. TCC apply fluid applies torque converter clutch.

Note. Test numbers refer to numbers on diagnostic chart.

1. Checks mechanical state of TCC. When TCC is commanded off, slip speed should increase.

CODE 69, TORQUE CONVERTER CLUTCH STUCK ON 4L80-E TRANSMISSION

Control module commands TCC PWM solenoid on by modulating signal fluid on converter clutch shift valve. TCC apply fluid applies torque converter clutch.

Note. Test numbers refer to numbers on diagnostic chart.

1. Checks mechanical state of TCC. When TCC is commanded off, slip speed should increase.