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: It is advisable not to use a cellular phone or to have a cellular phone in close proximity when working on the restraints control module or associated systems

NOTE: Given the legal implications of a restraints system failure, harness repairs to Air Bag module circuits are not acceptable. Where the text refers to "REPAIR the circuit", this will normally mean the replacement of a harness.

NOTE: If the control module or a 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 programme is in operation, prior to the installation of a new module/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: 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 diagnostic trouble codes 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

NOTE: Where an 'on demand self-test' is referred to, this can be accessed via the 'diagnostic trouble code monitor' tab on the manufacturers approved diagnostic system

The table below lists all diagnostic trouble codes (DTCs) that could be logged in the occupant classification system, for additional diagnosis and testing information refer to the relevant diagnosis and testing section. For additional information, refer to DIAGNOSIS AND TESTING .

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	General electrical failure	Clear diagnostic trouble code and re-test. If the problem persists, check and install a new safety belt tension sensor as required. Refer to the warranty policy and procedures manual, or determine if any prior approval programme is in operation, prior to the installation of a new module/component
B1A54-02	Occupant Belt Tension Sensor - General signal failure	General signal failure	Refer to the electrical circuit diagrams and check safety belt tension and mat pressure sensor circuits for short to each other
B1A54-11	Occupant Belt Tension Sensor - circuit short to ground	Safety belt tension sensor voltage reference or signal circuit - short to ground	Refer to the electrical circuit diagrams and check safety belt tension sensor voltage reference and signal circuits for short to ground
B1A54-12	Occupant Belt Tension Sensor - circuit short to battery	Safety belt tension sensor voltage reference or signal circuit - short to power	Refer to the electrical circuit diagrams and check safety belt tension sensor voltage reference and signal circuits for short to power
B1A54-13	Occupant Belt Tension Sensor - circuit open	Safety belt tension sensor voltage reference or signal circuit - open circuit	Refer to the electrical circuit diagrams and check safety belt tension sensor voltage reference and signal circuits for open circuit
B1A62-02	Pressure Sensor - General signal failure	General signal failure	Refer to the electrical circuit diagrams and check safety belt tension and mat pressure sensor circuits for short to each other
B1A62-11	Pressure Sensor - circuit short to ground	Mat pressure sensor voltage reference or signal circuits - short to ground	Refer to the electrical circuit diagrams and check mat pressure sensor voltage reference and signal circuits for short to ground
B1A62-12	Pressure Sensor - circuit short to battery	Mat pressure sensor voltage reference, ground or signal circuits - short to power	Refer to the electrical circuit diagrams and check mat pressure sensor voltage reference, ground and signal circuits for short to power
B1A62-13	Pressure Sensor - circuit open	Mat pressure sensor voltage reference or signal circuit - open circuit	Refer to the electrical circuit diagrams and check mat pressure sensor voltage reference and signal circuits for open circuit
B1A62-7B	Pressure Sensor - low fluid level	Low fluid level - bladder damaged	Check and install new bladder as required. Refer to the warranty policy and procedures manual, or determine if any prior approval programme is in operation, prior to the installation of a new module/component
U0001-88	High Speed CAN Communication Bus - Bus off	Bus off	Refer to the electrical circuit diagrams and check CAN network for short, open circuit. Carry out the CAN network integrity test using the manufacturer approved diagnostic system
U0151-00	Lost Communication With Restraints Control Module - no sub type information	Restraints control module missing message	Refer to the electrical circuit diagrams and check power and ground supplies to restraints control module. Carry out CAN network integrity test using the manufacturer approved diagnostic system
U0300-00	Internal Control Module Software Incompatibility - no sub type information	Master car configuration file ID does not correspond	Check correct occupancy seat module is installed for vehicle specification. Check rear junction box for related diagnostic trouble codes and refer to relevant diagnostic trouble code index
U2016-51	Control Module Main Software - not programmed	Main software not programmed	Check and install a new occupancy seat module as required. Refer to the warranty policy and procedures manual, or determine if any prior approval programme is in operation, prior to the installation of a new module/component
U201A-51	Control Module Main Calibration Data - not programmed	Main calibration data not programmed	Check and install a new occupancy seat module as required. Refer to the warranty policy and procedures manual, or determine if any prior approval programme is in operation, prior to the installation of a new module/component
U3000-04	Control Module - System Internal Failures	Occupancy seat module internal electronic failure	Check and install a new occupancy seat module as required. Refer to the warranty policy and procedures manual, or determine if any prior approval programme is in operation, prior to the installation of a new module/component
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 occupancy seat 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. Occupancy seat 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	Check battery is in fully charged and serviceable condition. Check integrity of charging system
U3003-17	Battery Voltage - circuit voltage above threshold	Circuit voltage above threshold	Check battery is in fully charged and serviceable condition. Check integrity of charging system