B1BBC

B1BBC-OCS NEGATIVE SYSTEM WEIGHT





- When Monitored:
While the CAN bus ignition status is in IGN_RUN, the Occupant Classification module (OCM) checks the sensor input ranges.

- Set Condition:
If the OCM detects a seat weight sensor input with the total seat weight below -6.5 kg (+/- 1 kg)





1. CHECK FOR ACTIVE OCM DTCs
- Active Internal DTC
- Ignition DTC
- Battery DTC
- Seat Weight Sensor DTC

NOTE: Make sure the battery is fully charged.

1. Turn the ignition on, then off and then on again.
2. With the scan tool, read the Occupant Classification Module (OCM) DTCs.

Does the scan tool display any active DTCs listed above?

Yes

- Perform the appropriate DTC. Testing and Inspection.

No

- Go To 2

2. ACTIVE OR STORED DTC
1. With the scan tool, read the OCM DTCs.

Does the scan tool display active B1BBC-OCS NEGATIVE SYSTEM WEIGHT DTC?

Yes

- Go To 3

No

- Perform the OCS INTERMITTENT TEST. .

3. PERFORM OCCUPANT CLASSIFICATION MODULE SYSTEM VERIFICATION TEST
1. Verify that the passenger seat is empty.

NOTE: Failure to follow the test instructions or aborting the test will cause faults to set when performing the Occupant Classification Module System Verification Test. To prevent faults due to process errors: verify that all tests steps that led you here were performed as directed, verify that the ignition is in run. Wait 30 seconds after changing the seat weight before proceeding to allow the system to stabilize. Only press scan tool buttons when directed to do so and perform the Occupant Classification Module System Verification Test to completion.

2. With the scan tool in OCM, select More Options, select System Tests and select Occupant Classification Module System Verification Test. Run the test by following the instructions displayed on the scan tool. When the test is complete, proceed as follows.
3. With the scan tool, read the OCM DTCs.

Does the scan tool display active B1BA8-OCS NOT CALIBRATED DTC?

Yes

- Go To 4

No

- Active DTCs are present. Testing and Inspection Perform the appropriate DTC.

No

- No Active DTCs Present.
- Perform the OCS VERIFICATION TEST. .

4. VERIFY SENSOR IS TIGHTENED TO SPECIFICATION

WARNING: Turn the ignition off, disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

1. Verify that all of the Seat Weight Sensor mounting screws are tightened to specification. [1][2]Restraints and Safety Systems.

WARNING: Turn the ignition on, then reconnect the 12-volt battery. Failure to follow these instructions may result in possible serious or fatal injury.

NOTE: Failure to follow the test instructions or aborting the test will cause faults to set when performing the Occupant Classification Module System Verification Test. To prevent faults due to process errors: verify that all tests steps that led you here were performed as directed, verify that the ignition is in run. Wait 30 seconds after changing the seat weight before proceeding to allow the system to stabilize. Only press scan tool buttons when directed to do so and perform the Occupant Classification Module System Verification Test to completion.

2. With the scan tool in OCM, select More Options, select System Tests and select Occupant Classification Module System Verification Test. Run the test by following the instructions displayed on the scan tool. When the test is complete, proceed as follows.
3. With the scan tool, read the OCM DTCs.

Does the scan tool display active B1BA8-OCS NOT CALIBRATED DTC?

Yes

- Perform the DIAGNOSIS AND CHECKOUT PROCEDURE FOR SEAT WEIGHT SENSORS diagnostic procedure.

No

- DTCs are Present. Testing and Inspection Perform the appropriate DTC.

No

- No Active DTCs Present.
- Perform the OCS VERIFICATION TEST. .