SECTION 8—TILLER
Zoom 300 and Zoom 400
60
Part No 1122167
3. Put a block under the frame of the scooter to raise the drive wheels off the ground for
testing purposes.
4. Remove the upper tiller shroud. Refer to Removing/Installing the Upper Tiller Shroud
on page 44.
5. Using a 5/64” allen head tool, loosen the two (2) set screws slightly. Refer to
FIGURE 8.16.
NOTE: DO NOT remove the set screws.
6. Turn the key to the ON position.
7. Locate the RED and WHITE wires from the throttle potentiometer.
8. Using a digital volt meter, take a DC voltage reading from the RED and WHITE wires.
A reading of 2.3 VDC (±0.2) should be displayed. If the reading does not fall within
this range, go to STEP 9.
NOTE: A normal reading is around 2.3 VDC (±0.2), but if the Status LED continues to blink six
(6) times, the throttle pot needs to be re-calibrated.
9. To re-calibrate the throttle pot, perform the following:
A. Leave the digital multimeter hooked up to the red and white wires.
B. Using a small flat screwdriver, adjust the throttle potentiometer by turning the
potentiometer clockwise or counter-clockwise until the multimeter reading is
around 2.3 Volts (±0.2).
10. When the throttle potentiometer is re-calibrated and the reading falls within the
recommended range, tighten the two (2) set screws.
11. Replace the upper tiller shroud. Refer to Removing/Installing the Upper Tiller Shroud
on page 44.
12. Engage the brake release lever. Refer to Disengaging/Engaging the Brake Release
Lever on page 66.
13. Turn the power to the scooter off then on again.
14. Look at the Status LED. A solid GREEN LED should be displayed and the scooter can
be driven.
15. Test drive the scooter.
NOTE: If the scooter does not drive, repeat this procedure. If the scooter still does not drive, call
Invacare at the number listed on the back cover of this manual.
