B0061:11, B0061:12, B0061:13, B0061:1C, and B0061:49

Refer to OEM Wiring Diagrams - SUPPLEMENTAL RESTRAINT SYSTEM for schematic and connector information.

The BTS operates in conjunction with the OCS. The OCS interprets a variable voltage signal provided by the BTS to identify the possible presence of a child safety seat in the front passenger seat. The voltage output of the 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 BTS and related circuits for the following faults:

Resistance out of range
Unexpected voltage
Short to ground
Faulted BTS (part of front passenger safety belt)

If a fault is detected, the OCSM stores DTC B0061:11, B0061:12, B0061:13, B0061:1C or B0061:49 in memory and sends a message to the RCM over the HS-CAN indicating that an OCS fault is present. Upon receipt of this message, the RCM sets DTC B00A0:09 and sends a message over the HS-CAN to the IPC to illuminate the air bag 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 BTS signal circuit. An open 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 BTS signal circuit. An open 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 BTS circuit.
B0061:1C	Passenger Seatbelt Tension Sensor: Circuit Voltage Out of Range	A fault is indicated when the passenger safety belt is unbuckled and the OCSM measures voltage on the BTS signal circuit greater the maximum voltage returned during normal sensor operation.
B0061:49	Passenger Seatbelt Tension Sensor: Internal Electronic Failure	A fault is indicated when the OCSM senses an internal fault on the BTS signal circuit.