P1860 Buick TCC PWM Solenoid Circuit Electrical
Possible causes
– Faulty Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid
– Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid harness is open or shorted
– Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid circuit poor electrical connection
– Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid harness is open or shorted
– Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid circuit poor electrical connection
What about the obd code?
When the PCM detects a continuous open, short to ground or short to power in the TCC PWM solenoid valve circuit, then DTC P1860 Buick sets. DTC P1860 Buick is a type B DTC.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1860 Buick Description
The Torque Converter Clutch Pulse Width Modulation (TCC PWM) solenoid valve controls the fluid acting on the converter clutch valve. The converter clutch valve controls the TCC application and release. The solenoid attaches to the control valve body within the transmission. The solenoid receives ignition voltage through circuit 239. The Powertrain Control Module (PCM) controls the solenoid by providing a ground path on circuit 418. Current flows through the solenoid coil according to the duty cycle (percentage of ON and OFF time). The TCC PWM solenoid valve provides a smooth engagement of the torque converter clutch by operating during a duty cycle percent of ON time.
Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre – Buick Lucerne – Buick Park Avenue – Buick Regal – Buick Verano – Buick Enclave – Buick Encore – Buick Rainier – Buick Rendezvous – Buick Terraza – Buick Riviera