B1BA8

B1BA8-OCM SYSTEM OUT OF CALIBRATION/NOT CALIBRATED

Theory of Operation

When powered, the Occupant Classification Module (OCM) monitors the memory location containing the calibration flag. The calibration flag will be set (not calibrated) if the on board diagnostics determines that the OCM has not been calibrated, a new OCM is installed, the OCM Rezero Test failed, or the OCM Rezero process was not successfully completed.

- When Monitored:
When powered, the Occupant Classification Module (OCM) monitors the memory location containing the calibration flag.

- Set Condition:
This DTC will set if a new OCM is installed, or the OCM Rezero process was not successfully completed.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Restraints System Pre-Diagnostic Procedure

Diagnostic Test

1. VERIFY POST DEPLOYMENT REPAIRS
NOTE: Ensure that the battery is fully charged.

NOTE: Verify that the scan tool has the latest software update before proceeding with this test.

NOTE: If any airbags have been deployed, make sure all components related to the deployment have been inspected or replaced.

NOTE: Correct any active ORC power supply, Bus related DTCs before performing this procedure.

NOTE: Make sure that the passenger seat is empty and in the full rearward position before performing this procedure.

NOTE: Make sure the vehicle is setting level and the interior is at room temperature.

NOTE: Make sure the Passenger Seat Belt is unbuckled and completely retracted.



Continue

- Go To 2

2. PERFORM THE OCM REZERO TEST
With the scan tool in OCM, select MISC. FUNCTION and OCM REZERO.
Follow the instructions on the Scan Tool to complete the test.
Select the OCM REZERO procedure results from the list below.


Rezero Passed and Completed

- The OCM has passed the Rezero test and the repair is complete.
- Perform *RESTRAINTS SYSTEM VERIFICATION TEST. Verification Tests.

OCM Rezero Failed

- Go To 3

3. REZERO TEST RESULTS
With the scan tool, read the active OCM DTC.
The B1BA8-OCM SYSTEM OUT OF CALIBRATION/NOT CALIBRATED DTC will remain active until the REZERO test is completed successfully.
Does the scan tool display any active trouble codes except B1BA7 and B1BA8 DTC?

Yes

- Refer to the appropriate DTC procedure or symptom diagnostic Restraint System

No

- Go To 4

4. PERFORM SECOND OCM REZERO TEST
With the scan tool in OCM, select MISC. FUNCTION and OCM REZERO.
Follow the instructions on the Scan Tool to complete the test.
Select the OCM REZERO procedure results from the list below.
Does the scan tool display any active trouble codes except B1BA7 and B1BA8 DTC?

Rezero Passed and Completed

- The OCM has passed the Rezero test and the repair is complete.
- Perform *RESTRAINTS SYSTEM VERIFICATION TEST. Verification Tests.

OCM Rezero Failed

- Go To 5

5. REZERO TEST RESULTS
With the scan tool, read the active OCM DTC.
Does the scan tool display any active trouble codes except the B1BA8?

Yes

- Refer to the appropriate DTC procedure or symptom diagnostic Restraint System

No

- Go To 6

6. PERFORM THIRD OCM REZERO TEST
With the scan tool in OCM, select MISC. FUNCTION and OCM REZERO.
Follow the instructions on the Scan Tool to complete the test.
Select the OCM REZERO procedure results from the list below.


Rezero Passed and Completed

- The OCM has passed the Rezero test and the repair is complete.
- Perform *RESTRAINTS SYSTEM VERIFICATION TEST. Verification Tests.

OCM Rezero Failed

WARNING: To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.

WARNING: If the Occupant Classification Module (OCM) is dropped at any time, it must be replaced. Failure to take the proper precautions could result in accidental airbag deployment and serious or fatal injury.

CAUTION: Disconnecting or connecting the OCM connectors with the battery connected will permanently damage the OCM.

- Replace the OCM.
- Perform the *OCM REZERO. Restraint System