Prentice; Test the accelerator pedal transmitter under normal and slow operational conditions by a disconnecting the L25 plug from it's socket and apply 10v to the plug's 1 and 3 pins. Look for the pin numbers of the back side of the plug.
Voltage across connections 1 and 2 should read 4.5V dc with the pedal in neutral position. With the pedal actuated the voltage across 1 and 2 pins should be 4.5v to 10v. Rising and falling uniformly and if not within specification replace the transmitter.