P1126 Cadillac Throttle Control Motor Relay Circuit Open
– Magnetic Clutch harness is open or shorted
– Magnetic Clutch circuit poor electrical connection
Magnetic clutch is mounted between the throttle motor and the valve, and it connects the throttle motor with the throttle valve.
Therefore, the throttle motor opens and closes the throttle valve through the magnetic clutch.
If the electric throttle control system has a malfunction, the magnetic clutch separates the throttle motor from the throttle valve in order not to operate the throttle valve by the throttle motor.
If the P1126 Cadillac code is stored, the Engine Control Module (ECM) shuts down the power for the throttle motor and the magnetic clutch, and the throttle valve is fully closed by the return spring.
However, the opening angle of the throttle valve can be controlled by the accelerator pedal through the throttle cable.