Occupant Classification Module (OCM)

B2206-CURRENT VIN MISSING/MISMATCH







- When Monitored:
During power-up, the Occupant Classification Module (OCM) monitors the CAN bus for the VIN message.

- Set Condition:
This DTC will set if the VIN information received from the Powertrain Control Module (PCM) or Engine Control Module (ECM) is different from the stored VIN.





1. CHECK FOR ACTIVE DTC

NOTE: Make sure that the battery is fully charged.

NOTE: This DTC cannot be cleared until the RE-ZERO OCM SEAT WEIGHT SENSORS diagnostic procedure has been completed successfully.

NOTE: Troubleshoot any Ignition, Battery, Seat Weight Sensor or OCM Internal DTC BEFORE proceeding

1. With the scan tool, read the OCM DTC.

Does the scan tool display active B2206-CURRENT VIN MISSING/MISMATCH DTC?

Yes

- Go To 2

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time.

2. CHECK THE VIN STORED IN THE PCM OR ECM
1. With the scan tool, compare the VIN that is stored in the Powertrain Control Module (PCM) or Engine control Module (ECM) to the VIN of the vehicles VIN plate.

Does the VIN stored in the PCM or ECM match the vehicles VIN?

Yes

- Go To 3

No

- Replace and Configure the Powertrain Control Module (PCM) or Engine Control Module (ECM).
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test for gas engine applications.

3. PERFORM THE RE-ZERO OCM SEAT WEIGHT SENSORS PROCEDURE

NOTE: Make sure that the battery is fully charged.

NOTE: The Occupant Classification Seat Weights 9077 and Strain Gage Alignment Tool 9698A are required to perform this test.

1. Verify that the passenger seat is empty.

NOTE: Failure to follow the test instructions or aborting the test causes 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 OCS Verification Test.

2. With the scan tool in OCM, select More Options, 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 completes, wait two minutes and then proceed as follows.
3. With the scan tool, read the OCM DTC.

Does the scan tool display any active B2206-CURRENT VIN MISSING/MISMATCH DTC?

Yes

- Go To 4

No

- Perform the OCS VERIFICATION TEST. OCS Verification Test.

4. VERIFY PASSENGER SEAT RISER, TRACKS AND STRUCTURE

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 the passenger seat is empty.

CAUTION: To avoid seat weight sensor damage, the Strain Gage Alignment Tool 9698A must be used to when loosening or tightening the sensor retainers.

2. 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 causes 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 OCS Verification Test.

3. With the scan tool in OCM, select More Options, 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 completes, wait two minutes and then proceed as follows.
4. With the scan tool, read the OCM DTC.

Does the scan tool display active B2206-CURRENT VIN MISSING/MISMATCH DTC?

Yes

- 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.

- 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 may result in possible serious or fatal injury.

- Replace the OCM.
- Replace the Service Kit if a seat from another vehicle was installed.
- Perform the OCS VERIFICATION TEST. OCS Verification Test.

No - Other DTC Present

- Diagnose and repair the other DTC. Testing and Inspection.

No Active DTC Present

- Perform the OCS VERIFICATION TEST. OCS Verification Test.