Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2010 Mercury Milan Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Occupant Classification System Module (OCSM)
OCCUPANT CLASSIFICATION SYSTEM MODULE (OCSM) DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Action To Take |
|---|---|---|
| B00A0:54 | Occupant Classification System: Missing Calibration | Go To PINPOINT TEST AE . |
| B00A0:67 | Occupant Classification System: Signal Incorrect After Event | CARRY OUT the OCS System Reset. REFER to OCCUPANT CLASSIFICATION SENSOR (OCS) SYSTEM RESET . |
| B00A0:76 | Occupant Classification System: Wrong Mounting Position | Go To PINPOINT TEST AE . |
| B00A0:97 | Occupant Classification System: Component or System Operation Obstructed or Blocked | Go To PINPOINT TEST T . |
| B00C0:12 | Passenger Seat Occupant Classification Sensor "A": Circuit Short To Battery | Go To PINPOINT TEST U . |
| B00C0:13 | Passenger Seat Occupant Classification Sensor "A": Circuit Open | Go To PINPOINT TEST U . |
| B00C0:1A | Passenger Seat Occupant Classification Sensor "A": Circuit Resistance Below Threshold | Go To PINPOINT TEST U . |
| B00C0:49 | Passenger Seat Occupant Classification Sensor "A": Internal Electronic Failure | Go To PINPOINT TEST AE . |
| B00C0:81 | Passenger Seat Occupant Classification Sensor "A": Invalid Serial Data | CARRY out the Occupant Classification Sensor (OCS) System Reset. REFER to OCCUPANT CLASSIFICATION SENSOR (OCS) SYSTEM RESET . |
| B00C1:12 | Passenger Seat Occupant Classification Sensor "B": Circuit Short To Battery | Go To PINPOINT TEST V . |
| B00C1:13 | Passenger Seat Occupant Classification Sensor "B": Circuit Open | Go To PINPOINT TEST V . |
| B00C1:1A | Passenger Seat Occupant Classification Sensor "B": Circuit Resistance Blow Threshold | Go To PINPOINT TEST V . |
| B00C1:49 | Passenger Seat Occupant Classification Sensor "B": Internal Electronic Failure | Go To PINPOINT TEST AE . |
| B00C1:81 | Passenger Seat Occupant Classification Sensor "B": Invalid Serial Data | CARRY out the Occupant Classification Sensor (OCS) System Reset. REFER to OCCUPANT CLASSIFICATION SENSOR (OCS) SYSTEM RESET . |
| B00C2:12 | Passenger Seat Occupant Classification Sensor "C": Circuit Short To Battery | Go To PINPOINT TEST W . |
| B00C2:13 | Passenger Seat Occupant Classification Sensor "C": Circuit Open | Go To PINPOINT TEST W . |
| B00C2:1A | Passenger Seat Occupant Classification Sensor "C": Circuit Resistance Blow Threshold | Go To PINPOINT TEST W . |
| B00C2:49 | Passenger Seat Occupant Classification Sensor "C": Internal Electronic Failure | Go To PINPOINT TEST AE . |
| B00C2:81 | Passenger Seat Occupant Classification Sensor "C": Invalid Serial Data | CARRY out the Occupant Classification Sensor (OCS) System Reset. REFER to OCCUPANT CLASSIFICATION SENSOR (OCS) SYSTEM RESET . |
| B00C3:12 | Passenger Seat Occupant Classification Sensor "D": Circuit Short To Battery | Go To PINPOINT TEST X . |
| B00C3:13 | Passenger Seat Occupant Classification Sensor "D": Circuit Open | Go To PINPOINT TEST X . |
| B00C3:1A | Passenger Seat Occupant Classification Sensor "D": Circuit Resistance Blow Threshold | Go To PINPOINT TEST X . |
| B00C3:49 | Passenger Seat Occupant Classification Sensor "D": Internal Electronic Failure | Go To PINPOINT TEST AE . |
| B00C3:81 | Passenger Seat Occupant Classification Sensor "D": Invalid Serial Data | CARRY out the Occupant Classification Sensor (OCS) System Reset. REFER to OCCUPANT CLASSIFICATION SENSOR (OCS) SYSTEM RESET . |
| B1193:00 | Crash Event Storage Full and Locked: No Sub Type Information | INSTALL new OCS left and right weight sensor assemblies. REFER to INSPECTION AND REPAIR AFTER A SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPLOYMENT . |
| B1A59:01 | Sensor 5 Volt Supply: General Electrical Failure | Go To PINPOINT TEST AF . |
| B1A59:11 | Sensor 5 Volt Supply: Circuit Short to Ground | Go To PINPOINT TEST AF . |
| U0100:00 | Lost Communication With ECM/PCM "A": No Sub Type Information | U0100:00 will set in a module that is reporting a communication fault from another module on the data bus. The module that reports the fault is not the problem module. Do not install a new OCSM
as part of repair for DTC U0100:00. REFER to MODULE COMMUNICATIONS NETWORK to diagnose lost communication with the PCM. |
| U0151:00 | Lost Communication With Restraints Control Module: No Sub Type Information | U0151:00 will set in a module that is reporting a communication fault from another module on the data bus. The module that reports the fault is not the problem module. Do not install a new OCSM
as part of repair for DTC U0151:00. REFER to MODULE COMMUNICATIONS NETWORK to diagnose lost communication with the Restraints Control Module (RCM). |
| U0401:00 | Invalid Data Received From ECM/PCM "A": No Sub Type Information | U0401:00 will set in a module that is reporting a communication fault from another module on the data bus. The module that reports the fault is not the problem module. Do not install a new OCSM
as part of repair for DTC U0401:00. CARRY OUT PCM Self Test. REPAIR any speed-related DTCs. REFER to DTC chart in INTRODUCTION - GASOLINE MODELS or INTRODUCTION - HYBRID . |
| U200D:12 | Control Module Output Power A: Circuit Short To Battery | Go To PINPOINT TEST AH . |
| U3000:49 | Control Module: Internal Electronic Failure | INSTALL a new OCSM . REFER to OCCUPANT CLASSIFICATION SYSTEM MODULE (OCSM) . |
| U3000:53 | Control Module: Deactivated | INSTALL a new OCSM . REFER to OCCUPANT CLASSIFICATION SYSTEM MODULE (OCSM) . |
| U3000:54 | Control Module: Missing Calibration | CARRY out the Occupant Classification Sensor (OCS) System Reset. REFER to OCCUPANT CLASSIFICATION SENSOR (OCS) SYSTEM RESET . |
| U3003:16 | Battery Voltage: Circuit Voltage Below Threshold | Go To PINPOINT TEST AI . |
| U3003:17 | Battery Voltage: Circuit Voltage Above Threshold | Go To PINPOINT TEST AI . |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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