Avenger L4-2.0L DOHC (1995)
Throttle Position Sensor: Description and Operation
Throttle Position Sensor Voltage Low
NAME OF CODE:
Throttle Position Sensor Voltage Low
WHEN MONITORED:
With the ignition ON.
SET CONDITION:
The Throttle Position (TP) sensor voltage at Powertrain Control Module (PCM) cavity 10 goes below 0.2 volt for 0.704 seconds, or MPH is
above 20, RPM is above 1500, and vacuum is below 2" with TP sensor voltage less than 0.5 volt for 0.704 seconds.
THEORY OF OPERATION:
The throttle position sensor contains a potentiometer that is operated by the throttle blade shaft. As the throttle plate rotates, the TP sensor
provides a variable 0 to 5-volt signal to PCM cavity 10. The voltage is directly proportional to throttle angle. When the throttle is fully open, the
voltage is high. With this signal, the PCM can determine precise throttle position under all operating conditions. The TP sensor receives a 5-volt
supply from PCM cavity 43. The sensor ground is provided by PCM cavity 51.
POSSIBLE CAUSES:
-
Sensor signal circuit shorted to ground
-
Throttle position sensor failure
-
Loss of 5-volt supply
