Component Testing

TP Sensor

1. Ignition OFF, disconnect the harness connector of the throttle body assembly.
2. Measure for 1,160-1,175 ohms between the 5-volt reference and the low reference terminals of the TP sensor.
   • If the resistance is not within the specified range, replace the throttle body assembly.
3. Measure the resistance between the signal terminal and the low reference terminal of the TP sensor. Sweep the TP sensor through the entire range. The resistance should vary between 1,530 and 630 ohms without any spikes or dropouts.
   • If the resistance is not within the specified range or is erratic, replace the throttle body assembly.
4. Apply 5 volts and ground to the applicable terminals of the TP sensor, and measure the voltage between the signal and the low reference terminals. Sweep the TP sensor through the entire range. The voltage should vary between 4.3-0.6 volts without any spikes or dropouts.
   • If the voltage is not within the specified range or is erratic, replace the throttle body assembly.

MAP Sensor

1. Ignition OFF, disconnect the harness connector of the MAP sensor.
2. Apply 5 volts and ground to the applicable terminals of the MAP sensor and measure the voltage from the signal circuit of the MAP sensor to the negative battery terminal. Apply the specified vacuum to the MAP sensor.
   • If voltage is not with in the specified range, replace the MAP sensor.