Pinpoint Test - DTC: AK
B0061:11, B0061:12, B0061:13, B0061:49 and B0061:64
Refer to Wiring Diagrams Cell 46 for schematic and connector information.
Normal Operation and Fault Conditions
The Belt Tension Sensor (BTS) operates in conjunction with the OCS. The OCS interprets a variable voltage signal provided by the Belt Tension Sensor (BTS) to identify the possible presence of a child safety seat in the front passenger seat. The voltage output of the Belt Tension Sensor (BTS) is proportional to the amount of tension applied to the sensor by the belt: no belt tension causes a low voltage (approximately 0.95 volt) to be output and high belt tension causes a high voltage (approximately 3.8 volts) to be returned to the OCSM.
The OCSM monitors the Belt Tension Sensor (BTS) and related circuits for the following faults:
Resistance out of range Unexpected voltage Short to ground Faulted Belt Tension Sensor (BTS) (part of RH front passenger safety belt buckle)
If a fault is detected, the OCSM stores DTC B0061:11, B0061:12, B0061:13, B0061:49 or B0061:64 in memory and sends a message to the RCM over the HS-CAN2 indicating that an OCS fault is present. Upon receipt of this message, the RCM sets DTC B00A0:09 and sends a message to the IPC to illuminate the airbag warning indicator.
DTC Fault Trigger Conditions
DTC | Description | Fault Trigger Conditions |
|---|---|---|
B0061:11 | Passenger Seatbelt Tension Sensor: Circuit Short to Ground | A fault is indicated when the OCSM measures voltage below a predetermined threshold on the Belt Tension Sensor (BTS) signal circuit. An open Belt Tension Sensor (BTS) VREF circuit can also set this DTC. |
B0061:12 Passenger Seatbelt Tension Sensor: Circuit Short to Battery | A fault is indicated when the OCSM measures voltage above a predetermined threshold on the Belt Tension Sensor (BTS) signal circuit. An open Belt Tension Sensor (BTS) return circuit can also set this DTC. | |
B0061:13 Passenger Seatbelt Tension Sensor: Circuit Open | A fault is indicated when the OCSM senses an open on either Belt Tension Sensor (BTS) circuit. | |
B0061:49 Passenger Seatbelt Tension Sensor: Internal Electronic Failure | A fault is indicated when the OCSM senses an internal fault on the Belt Tension Sensor (BTS) signal circuit. | |
B0061:64 Passenger Seatbelt Tension Sensor: Signal Plausibility Failure | A fault is indicated when the passenger safety belt is unbuckled and the OCSM measures voltage on the Belt Tension Sensor (BTS) signal circuit greater than the maximum voltage returned during normal sensor operation. |
Possible Sources
Wiring, terminals or connectors Belt Tension Sensor (BTS) (part of RH front passenger safety belt buckle) OCSM
Visual Inspection and Diagnostic Pre-checks
Inspect for a damaged passenger safety belt buckle or Belt Tension Sensor (BTS). Inspect for a damaged passenger seat cushion wiring harness. Inspect for a loose or damaged OCSM or Belt Tension Sensor (BTS) connector. Inspect for a damaged OCSM.
PINPOINT TEST A : B0061:11, B0061:12, B0061:13, B0061:49 AND B0061:64
WARNING: Incorrect repair techniques or actions can cause an accidental Supplemental Restraint System (SRS) deployment. Never compromise or depart from these instructions. Failure to precisely follow all instructions could result in serious personal injury from an accidental deployment.
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test.
NOTE: Only disconnect or reconnect SRS components when instructed to do so within a pinpoint test step. Failure to follow this instruction may result in incorrect diagnosis of the SRS.
NOTE: Always make sure the correct SRS component is being installed. Parts released for other vehicles may not be compatible even if they appear physically similar. Check the part number listed in the Ford parts catalog to make sure the correct component is being installed. If an incorrect SRS component is installed, Diagnostic Trouble Codes (DTCs) may set.
NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
A1 RETRIEVE OCSM (OCCUPANT CLASSIFICATION SYSTEM MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
WARNING: Before beginning any service procedure in this section, refer to Safety Warnings in section 100-00 General Information. Failure to follow this instruction may result in serious personal injury.
REFER to: Pyrotechnic Device Health and Safety Precautions (100-00 General Information, Description and Operation).
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.