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.
Occupant Classification System Module (OCSM)
| DTC | Description | Action To Take |
|---|---|---|
| B1231 | Event Threshold Exceeded (Crash Data Memory Full) | INSPECT the passenger seat for damage. Refer to INSPECTION AND REPAIR AFTER A SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPLOYMENT in this information. |
| B1317 | Battery Voltage High | Go to PINPOINT TEST Z . |
| B1318 | Battery Voltage Low | Go to PINPOINT TEST Z . |
| B1342 | ECU is Faulted | INSTALL an Occupant Classification Sensor (OCS) service kit. Refer to OCCUPANT CLASSIFICATION SENSOR in this information. |
| B2290 | Occupant Classification System Fault | Go to PINPOINT TEST AA . |
| B2909 | Belt Tension Sensor Fault | Go to PINPOINT TEST AB . |
| C1941 | Zero Seat Weight Test Failure | This DTC is only reported when carrying out the System Reset. Go to PINPOINT TEST AA . |
| U0151 | Lost Communication with Restraints Control Module (RCM) |
NOTE:
The DTC 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.
Refer to MODULE COMMUNICATIONS NETWORK to diagnose the RCM . RCM does not respond to the scan tool. |
| U2050 | No Application Present | INSTALL a new OCS system service kit. Refer to OCCUPANT CLASSIFICATION SENSOR in this information. |
| U2051 | One or More Calibration Files Missing/Corrupt | INSTALL a new OCS system service kit. Refer to OCCUPANT CLASSIFICATION SENSOR in this information. |
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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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