Occupant Classification System (OCS)

CAUTION: Diagnosis by substitution from a donor vehicle is NOT acceptable. Substitution of control modules does not guarantee confirmation of a fault, and may also cause additional faults in the vehicle being tested and/or the donor vehicle.

CAUTION: When probing connectors to take measurements in the course of the pinpoint tests, use the adaptor kit, part number 3548-1358-00.

NOTE: If a control module or component is suspect and the vehicle remains under manufacturer warranty, refer to the Warranty Policy and Procedures manual (section B1.2), or determine if any prior approval program is in operation, before the replacement of a component.

NOTE: Generic scan tools may not read the codes listed, or may read only 5-digit codes. Match the 5 digits from the scan tool to the first 5 digits of the 7-digit code listed to identify the fault (the last 2 digits give extra information read by the manufacturer-approved diagnostic system).

NOTE: When performing voltage or resistance tests, always use a digital multimeter (DMM) accurate to three decimal places, and with an up-to-date calibration certificate. When testing resistance always take the resistance of the DMM leads into account.

NOTE: Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.

NOTE: Inspect connectors for signs of water ingress, and pins for damage and/or corrosion.

NOTE: If DTCs are recorded and, after performing the pinpoint tests, a fault is not present, an intermittent concern may be the cause. Always check for loose connections and corroded terminals.

Description And Operation

For a detailed description of the occupant classification system, refer to the relevant Description and Operation section in the workshop manual. Refer to Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS) .

OCCUPANT CLASSIFICATION SYSTEM (OCS)

DTC	Description	Possible Cause	Action
B1193-53	Crash Event Storage Full and Locked - deactivated	Crash event occurred	Clear diagnostic trouble code and re-test
B1A54-01	Occupant Belt Tension Sensor - General Electrical Failure	Seatbelt tension sensor internal fault	Clear the diagnostic trouble code and re-test. If the problem persists, install a new seatbelt tension sensor as necessary
B1A54-02	Occupant Belt Tension Sensor - General signal failure	Seatbelt tension sensor signal circuit short circuit to ground, short circuit to power, open circuit, high resistance	Refer to the electrical circuit diagrams and test the seatbelt tension sensor signal circuit for short circuit to ground, short circuit to power, open circuit, high resistance
B1A54-11	Occupant Belt Tension Sensor - circuit short to ground	Seatbelt tension sensor signal circuit short circuit to ground	Refer to the electrical circuit diagrams and test the seatbelt tension sensor signal circuit for short circuit to ground
B1A54-12	Occupant Belt Tension Sensor - circuit short to battery	Seatbelt tension sensor signal circuit short circuit to power	Refer to the electrical circuit diagrams and test the seatbelt tension sensor signal circuit for short circuit to power
B1A54-13	Occupant Belt Tension Sensor - circuit open	Seatbelt tension sensor signal circuit open circuit	Refer to the electrical circuit diagrams and test the seatbelt tension sensor signal circuit for open circuit
B1A62-02	Pressure Sensor - General signal failure	Occupant detection sensor signal circuit short circuit to ground, short circuit to power, open circuit, high resistance	Refer to the electrical circuit diagrams and test the occupant detection sensor circuit for short circuit to ground, short circuit to power, open circuit, high resistance
B1A62-11	Pressure Sensor - circuit short to ground	Occupant detection sensor signal circuit short circuit to ground	Refer to the electrical circuit diagrams and test the occupant detection sensor signal circuit for short circuit to ground
B1A62-12	Pressure Sensor - circuit short to battery	Occupant detection sensor signal circuit short circuit to power	Refer to the electrical circuit diagrams and test the occupant detection sensor signal circuit for short circuit to power
B1A62-13	Pressure Sensor - circuit open	Occupant detection sensor signal circuit open circuit	Refer to the electrical circuit diagrams and test the occupant detection sensor signal circuit for open circuit
B1A62-7B	Pressure Sensor - low fluid level	Occupant detection sensor bladder ruptured	Install a new bladder as necessary
U0001-88	High Speed CAN Communication Bus - Bus off	High speed CAN bus circuit fault	Using the manufacturer approved diagnostic system, complete a CAN network integrity test Refer to the electrical circuit diagrams and test the CAN network for short circuit, open circuit
U0151-00	Lost Communication With Restraints Control Module - no sub type information	Lost communication with the restraints control module	Using the manufacturer approved diagnostic system, complete a CAN network integrity test Refer to the electrical circuit diagrams and test the power and ground connections to the restraints control module Refer to the electrical circuit diagrams and test the CAN network between the restraints control module and the occupant classification sensor control module
U0300-00	Internal Control Module Software Incompatibility - no sub type information	Master car configuration file ID does not correspond	Check that the correct the occupant classification sensor control module is installed for vehicle specification. Check central junction box for related diagnostic trouble codes and refer to relevant diagnostic trouble code index
U2016-51	Control Module Main Software - not programmed	Occupant classification sensor control module internal failure	Install a new occupant classification sensor control module as necessary
U201A-51	Control Module Main Calibration Data - not programmed	Occupant classification sensor control module internal failure	Install a new occupant classification sensor control module as necessary
U3000-04	Control Module - System Internal Failures	Occupant classification sensor control module internal failure	Install a new occupant classification sensor control module as necessary
U3000-54	Control Module - missing calibration	This diagnostic trouble code is set if a 'calibrate occupancy seat module empty seat offset' routine is requested and fails due to one of the pre-conditions to execute the routine	Check the following criteria have all been achieved: Ignition status set to RUN/START. Verify seat is always empty after power-up before re-zero is requested. The occupant classification sensor control module has gone through the seat assembly plant calibration. No collision event received from the restraints control module during the current ignition cycle. No faults present in the current ignition cycle. The trigger message for calibrate empty seat offset has been received from the diagnostic tool. Occupant classification sensor control module has enough time to begin classification. Temperature is between 6C (42F) and 36C (97F)
U3003-16	Battery Voltage - circuit voltage below threshold	Circuit voltage below threshold	Test the battery Test the charging system
U3003-17	Battery Voltage - circuit voltage above threshold	Circuit voltage above threshold	Test the charging system