Occupant Classification Module (OCM)

B210D-BATTERY VOLTAGE LOW







- When Monitored:
While the Occupant Classification Module (OCM) CAN bus ignition status received is RUN or signal not available, the module checks the (A952) Fused B(+) circuit voltage input range.

The Occupant Restraint Controller (ORC) checks the (F100) Fused Ignition Switch Output (RUN) and (F200) Fused Ignition Switch Output (RUN/START) circuit voltage input range.

- Set Condition:
If the OCM detects that the battery voltage is less than or equal to 6.25 volts ±0.25 volts.

If the ORC detects battery voltage is less than or equal to 6.25 volts ±0.25 volts on both (F100) Fused Ignition Switch Output (RUN) and (F200) Fused Ignition Switch Output (RUN/START) circuits.





1. IDENTIFY MODULE REPORTING B210D-BATTERY VOLTAGE LOW

NOTE: Make sure the battery is fully charged.

NOTE: Troubleshoot any PCM charging/cranking DTCs before proceeding.

NOTE: Troubleshoot B212C-Ignition Run/Start Input Circuit Open or B212D-Ignition Run Only Input Circuit Open before proceeding.

1. Turn the ignition on.
2. With the scan tool, read the OCM and ORC DTCs.

Select the module displaying the: B210D-BATTERY VOLTAGE LOW DTC?

OCM

- Go To 2

ORC

- Go To 5

2. VERIFY THAT OCM DTC B210D-BATTERY VOLTAGE LOW IS ACTIVE
1. With the scan tool, read the Occupant Classification Module (OCM) DTCs.

Does the scan tool display active: B210D-BATTERY VOLTAGE LOW IS ACTIVE?

Yes

- Go To 3

No

- Go To 7

3. CHECK FOR CHARGING SYSTEM RELATED DTCs IN THE POWERTRAIN CONTROL MODULE (PCM)
1. With the scan tool in ECU View, select PCM and check for any Charging System related DTCs.

Does the scan tool display any Charging System related DTCs?

Yes

- Diagnose and repair the DTCs. Testing and Inspection.

No

- Go To 4

4. CHECK VOLTAGE OF OCM (A952) FUSED B(+).
1. With the scan tool in Data Display, read OCM battery voltage.

Is the battery voltage below 6.5 volts?

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 can result in accidental airbag deployment and serious or fatal injury.

- Replace the OCM.
- Perform the OCM VERIFICATION TEST. Occupant Classification Module (OCM) System Verification Test.

No

- Repair the (A952) Fused B(+) circuit for an open or high resistance.
- Perform the ORC VERIFICATION TEST. Occupant Restraint Controller (ORC) Verification Test.

5. CHECK FOR CHARGING SYSTEM RELATED DTCs IN THE POWERTRAIN CONTROL MODULE (PCM)
1. With the scan tool in ECU View, select PCM and check for any Charging System related DTCs.

Does the scan tool display any Charging System related DTCs?

Yes

- Diagnose and repair the DTCs. Testing and Inspection.

No

- Go To 6

6. CHECK ORC VOLTAGE.
1. With the scan tool in Data Display, read ORC battery voltage.

Is the ORC battery voltage below 6.5 volts?

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 Restraint Controller (ORC) is dropped at any time, it must be replaced. Failure to follow these instructions may result in possible serious or fatal injury.

- Replace the ORC.
- Perform the ORC SYSTEM VERIFICATION TEST. Occupant Restraint Controller (ORC) Verification Test.

No

- Repair both (F100) Fused Ignition Switch Output (RUN) and (F200) Fused Ignition Switch Output (RUN/START) circuits for an open or high resistance.
- Perform the AIRBAG SYSTEM VERIFICATION TEST. Airbag System Verification Test.

7. CHECKING STORED OR INTERMITTENT CODES

NOTE: Diagnose and repair all active codes before diagnosing stored codes.

1. With the scan tool, record and erase all Airbag System Module DTCs.

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.

2. Using the wiring diagram/schematic as a guide, inspect the related wiring and connectors for chafed, pierced, pinched, and partially broken wires, and for broken, bent, pushed out, corroded, and contaminated terminals. Repair as necessary.
3. Reconnect all disconnected components and harness connectors.

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

Does the scan tool display any ACTIVE DTCs?

Yes

- Select appropriate diagnostic procedure. Testing and Inspection.

No

- No problem found at this time. Erase all codes before returning vehicle to customer.