Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Accuracy Check of Occupant Classification Sensor

ACCURACY CHECK OF OCCUPANT CLASSIFICATION SENSOR

The scan tool can be used to perform the next function.
- Zero-Calibration & System Test


CAUTION: The following precaution must be observed when executing accuracy testing and calibration.
- Perform the occupant classification sensor calibration at room temperature. (Proposal: 20 ± 15°C (68 ± 27° F)) Before the calibration, place the occupant classification sensor more than 30 minutes at room temperature.)
- Do not apply any load or vibration while the weight check and the calibration is performed.
- Perform the weight check and the calibration after seat components are all assembled.








CAUTION: prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

1. Connect scan tool MB991958 to the data link connector.
2. To execute accuracy check and calibration, operate scan tool MB991958 (M.U.T.-III Sub Assembly) as follows.
1. Select "OCM".
2. Select "Special Function".







3. Select "Zero Calibration & System Test".
4. The start of the zero calibration.







5. The execution check of the zero calibration.







6. The zero calibration has been completed when the screen as shown in the illustration is displayed. The OK button is pushed and it progresses to the next.
7. The start of 66 lbs system test.







8. The execution check of the 66 lbs system test.







9. The 66 lbs system test has been completed when the screen as shown in the illustration is displayed. The OK button is pushed and it progresses to the next.
10. The start of 0 lbs system test.







11. The execution check of the 0 lbs system test.







12. The 0 lbs system test has been completed when the screen as shown in the illustration is displayed.