Throttle position sensor

1. Check:

• Throttle position sensor

a. Connect the digital circuit tester to the terminals of the throttle body sensor assembly coupler as shown.

• Positive tester probe → gray/red terminal "1"
• Negative tester probe → gray/black terminal "2"

b. Measure the throttle position sensor input voltage.

Out of specification → Replace or repair the wire harness.

c. Connect the digital circuit tester to the terminals of the throttle body sensor assembly coupler as shown.

• Positive tester probe → yellow terminal "3"
• Negative tester probe → gray/black terminal "2"

d. While slowly opening the throttle, check that the throttle position sensor output voltage is increased.

Voltage does not change or it changes abruptly → Replace the throttle body.

Out of specification (closed position) → Replace the throttle body.