Note: Before adjusting the throttle position sensor, the engine idling speed should be properly adjusted.
1. Inspect: throttle position sensor
a. Disconnect the throttle position sensor coupler.
b. Connect the pocket tester (Ω x 1k) to the throttle position sensor.
- Tester positive lead → blue (1)
- Tester negative lead → black (2)
c. Check the throttle position sensor resistance "R1".
Out of specification → Replace the throttle position sensor.
- Throttle position sensor resistance "R1": 4-6 kΩ at 20°C (68°F) (blue - black)
d. Connect the pocket tester (Ω x 1k) to the throttle position sensor.
- Tester positive lead → yellow (3)
- Tester negative lead → black (2)
e. While slowly opening the throttle, check that the throttle position sensor resistance "R2" is within the specified range.
Out of specification → Replace the throttle position sensor.
- Throttle position sensor resistance "R1": 0.56-0.84 kΩ to 3.01-4.51 kΩ at 20°C (68°F) (yellow - black)
2. Adjust: throttle position sensor angle
a. Loosen the throttle position sensor screws (1).
b. Turn the throttle position sensor in direction (a) or (b) until the specified closed-throttle resistance is indicated on the pocket tester.
- Closed-throttle resistance 0.56-0.84 kΩ at 20°C (yellow - black)
c. Tighten the throttle position sensor screws.
Note: Remove the pocket tester leads and connect the throttle position sensor coupler.