SENR9977 31 Systems Operation Section Supply Voltage Supply voltage is a constant voltage that is supplied to a component in order to provide electrical power for operation. Supply voltage may be generated by the ECM. Supply voltage may also be the battery voltage of the vehicle that is supplied by the vehicle wiring. Harness This harness is a test harness that is designed to permit normal circuit operation and the measurement of the voltage simultaneously. Typically, the harness is inserted between the two ends of a connector. Throttle Position The Throttle position is sent from the accelerator pedal. This signal is interpreted by the ECM.
The throttle position may be used as part of a power take-off control. Total Tattletale The total tattletale is the total number of changes to all system parameters.