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Calibrating ACR4 Weight Scale

WARNING: This page is about a different car, the 2002 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.

Calibrate the scale every three months.

To calibrate the weight scale on the ACR4 (J-39500-NI):

  1. Press Shift/Reset  and Enter  at the same time.
  2. Press 8787. "A1"  will be displayed.
  3. Remove all weight from the scale.
  4. Press 0  , then press Enter . "0.00"  will be displayed and change to "A2". 
  5. Place a known weight (dumbbell or similar weight), between 4.5 and 36.3 kg (10 and 80 lb) on the center of the weight scale.
  6. Enter the known weight using four digits. (Example 10 lbs = 10.00, 10.5 lbs = 10.50)
  7. Press Enter  - the display returns to the vacuum mode.
  8. Press Shift/Reset  and Enter  at the same time.
  9. Press 6  - the known weight on the scale is displayed.
  10. Remove the known weight from the scale. "0.00"  will be displayed.
  11. Press Shift/Reset  to return the ACR4 to the program mode.
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