Roadmaster Estate Wagon V8-305 5.0L (1991)
Throttle Position Sensor: Electrical Specifications
RESISTANCE VALUES
Injector [1]...................................................................................................................................................................................................... 1.2 Ohms min.
[1] Check across injector terminals.
VOLTAGE VALUES
Throttle Position Sensor
Voltage [1]....................................................................................................................................................................................................... 0.20-0.95 volts
NOTE:
[1] The TPS has an auto zeroing feature. If the voltage reading is within the range of about 0.20 to 0.95 volts, the ECM will use that value as closed
throttle. If the voltage reading is out of the auto zero range at closed throttle, check for a binding throttle cable or damaged linkage.
ECM CONTROLLED RELAYS AND SOLENOIDS
Check the resistance of each ECM controlled relay or solenoid coil before replacing an ECM. Replace any relay or solenoid if the resistance
measurement is less than 20 ohms. See ECM wiring diagrams under ELECTRICAL AND ELECTRONIC DIAGRAMS for coil terminal
identification of solenoids and relays to be checked.
