Operation CHARM: Car repair manuals for everyone.
Hosted by mcallihan.com
Home >> Honda >> 2006 >> S2000 L4-2.2L >> Repair and Diagnosis >> Restraints and Safety Systems >> Relays and Modules - Restraints and Safety Systems >> Seat Occupant Classification Module - Air Bag >> Testing and Inspection >> Component Tests and General Diagnostics

Component Tests and General Diagnostics

Operation Check of the Passenger's Weight Sensor Unit ('06 Model)

The operation of the passenger's weight sensor unit must be checked after any of these actions.
- Replacement of passenger's seat component(s) (except weight sensor unit and/or weight sensors)
- After a vehicle collision

Pre-Operation Check Set-up

- Make sure all the components of the passenger's seat are correctly installed.
- Position the passenger's seat to the rear most position.
- Adjust the seat recline to the forward most position.
- Do not move the seat from this position.
- Make sure nothing is on or under the passenger's seat.
- Keep the windows closed.
- Perform all calibration procedures, except test-driving, in the service bay.
- Make sure the vehicle is on level ground.
- Turn the heater and the A/C off.
- Do not touch the passenger's seat during the calibration.
- Do not expose the passenger's seat to sudden temperature changes.

After Replacing Passenger's Seat Component(s)




1. Connect the HDS to the data link connector (DLC) (A).
2. Drive the vehicle, accelerate to 20 mph (36 km/h), then stop on level ground.
3. From the HDS Main Menu, select SRS, then weight sensor, then Misc Test. then Inspection. In the HDS Inspection Menu, select "SEAT OUTPUT CHK." The weight (TO) of the passenger's seat is recorded by the HDS.
- If the reading on the HDS (TO) is ±6.6 lbs (±3.0 kg), or less, go to step 4.
- If the reading on the HDS (TO) is more than ±6.6 lbs (±3.0 kg), turn the ignition switch OFF, and go to step 1 of "Calibrating the Front Passenger's Weight Sensor Unit."

4. Prepare a 55 to 77 lbs (25 to 35 kg) weight, then measure and note its actual weight (M) with a scale.

NOTE: The accuracy of the scale must be within ±2.2 lbs (1 kg).

5. Place the prepared weight on the passenger's seat.
6. Drive the vehicle, and accelerate to 20 mph (36 km/h), then stop on level ground.
7. From the HDS Main Menu, select SRS, then Weight Sensor, then Misc Test, then Inspection. In the HDS Inspection Menu, select "SEAT OUTPUT CHK." The weight (T1) of the passenger's seat is recorded by the HDS.
8. Calculate the variance between the weight measured on the scale and the HDS with the formula shown.

Variance = (T1)-(TO)-(M1))< ±8.6 lbs (3.9 kg)

T1: Weight measured by the HDS with the weight on the seat
TO: Weight measured by the HDS with no load on the seat
M1: Weight measured on the scale

- If the variance is ±8.6 lbs (±3.9 kg) or less, the check is complete. Go to step 9.
- If the variance is more than ±8.6 lbs (±3.9 kg), remove the passenger's weight sensors, reinstall them, then repeat this procedure from the beginning.
- If after reinstalling the passenger's weight sensors, the variance is still more than ±8.6 lbs (±3.9 kg), replace the passenger's weight sensors (if they were not replaced).

9. Turn the ignition switch OFF, and disconnect the HDS from the DLC.

After a vehicle collision

10. Position the passenger's seat to the rear most position, adjust the recliner to the most forward position. Do not move it from these positions.




11. Connect the HDS to the data link connector (DLC) (A),
12. Drive the vehicle, accelerate to 20 mph (36 km/h), then stop on level ground.
13. From the HDS inspection menu, select Weight Sensor, then "SEAT OUTPUT CHK." The weight (TO) of the passenger's seat is recorded by the HDS.
- If the reading on the HDS (TO) is ±6.6 lbs (±3.0 kg) or less, go to step 14.
- If the reading on the HDS (TO) is more than ±6.6 lbs (±3.0 kg), remove the passenger's weight sensors, reinstall them, then repeat steps 1 through 3.
- If after reinstalling the passenger's weight sensors, the reading on the HDS (TO) is still more than ±6.6 lbs (±3.0 kg), go to step 1 of "Calibrating the Front Passenger's Weight Sensor Unit."

14. Prepare a 55 to 77 lbs (25 to 35 kg) weight, then measure and note its actual weight (M) on a scale.

NOTE: The accuracy of the scale must be within ±2.2 lbs (1 kg).

15. Place the prepared weight on the passenger's seat.
16. Drive the vehicle, and accelerate to 20 mph (36 km/h), then stop on level ground.
17. From the HDS Inspection Menu, select Weight Sensor, then "SEAT OUTPUT CHK." The weight (T1) of the passenger's seat is recorded by the HDS.
18. Calculate the variance between the weight measured on the scale and the HDS with the formula shown.

Variance = ((T1)-(TO)-(M1))< ±8.6 lbs (3.9 kg)

T1: Weight measured by the HDS with the weight on the seat
TO: Weight measured by the HDS with no load on the seat
M1: Weight measured on the scale

- If the variance is ±8.6 lbs (±3.9 kg) or less, the check is complete. Go to step 19.
- If the variance is more than ±8.6 lbs (±3.9 kg), remove the passenger's weight sensors, and reinstall them, then repeat this procedure from the beginning.
- If after reinstalling the passenger's weight sensors, the variance still more than ±8.6 lbs (±3.9 kg), replace the passenger's weight sensors and the seat riser, then go to step 1 of "Calibrating the Passenger's Weight Sensor Unit."

19. Turn the ignition switch OFF, and disconnect the HDS from the DLC.
pro multis · About Operation CHARM