Calibrating the Front Passenger's Weight Sensor Unit
Calibrating the Front Passenger's Weight Sensor UnitWhen the front passenger's weight sensors and/or weight sensor unit is replaced, calibrate the weight sensor unit by following the procedure.
While calibrating the front passenger's weight sensor unit, observe these precautions:
- Make sure all components of the front passenger's seat are correctly installed.
- Make sure all optional parts such as seat covers are removed.
- Make sure nothing is on or under the front passenger's seat.
- Make sure there is nothing in the front passenger's seat back pocket.
- Keep the windows closed.
- Perform all calibration procedures except test driving in the service bay.
- Make sure the vehicle is on level ground.
- Keep the A/C and the heater off.
- Do not touch the front passenger's seat until you drive the vehicle.
- Do not expose the front passenger's seat to sudden temperature changes.
1. Position the front passenger's seat to the rear most position, adjust the seat height to the lowest position, and adjust the recliner to the most forward position. Do not move from these positions.
2. Connect the Honda Diagnostic System (HDS) to the data link connector (DLC) (A).
3. Drive the vehicle, and accelerate to 20 mph (36 km/hr), then stop on level ground.
4. From the tester's Main Menu, select SRS, then Misc Test, then Adjustments. Select "SWS INIT" in the Adjustment Menu and follow the prompts unit the initialization operation has been completed between the seat weight sensor unit and the sensor.
5. Prepare a weight between 55 to 77 lbs (25 to 35 kg) then measure and note its actual weight (M) with a weight scale.
NOTE: The accuracy of the weight scale must be within ± 2.2 lbs (1 kg).
6. Place the prepared weight on the front passenger's seat.
NOTE: Leave the tester connected in the Misc Menu.
7. Drive the vehicle, and accelerate to 20 mph (36 km/hr), then stop on level ground.
8. From the tester's Main Menu, select SRS, then Misc Test, then Inspection. Select "SEAT OUTPUT CHK." in the tester's Inspection Menu. The weight (T) of the front passenger's seat is displayed by the tester. Write this measurement down as "T" on a piece of paper.
9. Calculate the variance between the weight measured by the weight scale (M) and the tester (T) with the formula.
Variance = (T)-(M) < ± 8.6 lbs (3.9 kg)
M: Weight measured by the weight scale.
T: Weight measured by the tester with the weight en the seat.
- If the variance is ± 8.6 lbs (± 3.9 kg) or less, calibration is complete. Go to step 18.
- If the variance is more than ± 8.6 lbs (± 3.9 kg), remove the seat weight sensors, and reinstall them, then go to step 10.
10. Remove weight from the front passenger's seat.
11. Drive the vehicle, accelerate to 20 mph (36 km/hr), then stop on level ground.
12. From the tester's inspection menu, select "SEAT OUTPUT CHK." The weight (T0) of the front passenger's seat is displayed by the tester. Write this measurement down as "T0".
- If the reading on the tester (T0) is ± 6.6 lbs (± 3.0 kg) or less, go to step 13.
- If the reading on the tester (T0) is more than ± 6.6 lbs (± 3.0 kg), repeat this procedure from the beginning.
13. Measure and note the prepare weight (M1) again with a weight scale.
14. Place the weight on the front passenger's seat.
15. Drive the vehicle, accelerate to 20 mph (36 km/hr), then stop on level ground.
16. From the tester's Main Menu, select SRS, then Misc Test, then Inspection. Select "SEAT OUTPUT CHK." in the tester's Inspection Menu. The weight (T1) of the front passenger's seat is displayed by the tester. Write this measurement down as "T1".
17. Calculate the variance between the weight measured by the weight scale and the tester with the formula.
Variance = (TI)-(M1) < ± 8.6 lbs (3.9 kg)
T1: Weight measured by the tester with the weight on the seat.
M1: Weight measured by the weight scale.
- If the variance is ± 8.6 lbs (± 3.9 kg) or less, calibration is complete. Go to step 18.
- If the variance is more than ± 8.6 lbs (± 3.9 kg), replace the front passenger's weight sensors (if they were not replaced before this step), and repeat this procedure from the beginning.
18. Turn the ignition switch OFF, and disconnect the HDS from the DLC.