DTC 83, TCC PWM Solenoid Circuit Fault: Notes
TCC PWM is used in combination with TCC solenoid to regulate fluid to torque converter and attached to transmission control valve body. PCM supplies a ground, allowing current to flow through solenoid coil according to duty cycle (percentage of on and off time). This current flow through solenoid coil creates a magnetic field that magnetizes the solenoid core. The magnetized core attracts the checkball to seat against spring pressure. This blocks the exhaust for the TCC signal fluid and allows 2-3 drive fluid to feed TCC signal circuit. TCC signal fluid pressure acts on TCC regulator valve to regulate line pressure and to apply fluid pressure to torque converter clutch shift valve. When TCC shift valve is in apply position, regulated fluid pressure is directed through TCC valve to apply torque converter clutch.
DTC 83 will set when:
- PCM commands solenoid on and voltage remains high (B+).
Or
- PCM commands solenoid off and voltage remains low (zero volt).
- All conditions are met for 2 seconds.
PCM will default to inhibit TCC operation and inhibit 4th gear operation if in hot mode.
- This test checks if PCM is commanding TCC solenoid on.
- This test checks for voltage to solenoid.