No 5 Volts to TP Sensor

NAME OF CODE:
No 5 Volts to TP Sensor

WHEN MONITORED:
Vehicle speed above 20 mph, MAP sensor vacuum above 3 in., and engine speed above 1500 rpm.

SET CONDITION:
TP sensor signal goes below 0.5 volts.

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 61.
- The sensor ground is provided by PCM cavity 43.

POSSIBLE CAUSES:
- Open 5 volt supply
- TP sensor failure