PINPOINT TEST Z : B0061:11, B0061:12, B0061:13, B0061:1C, and B0061:49: Notes
Diagnostic Overview
B0061:11, B0061:12, B0061:13, B0061:1C, and B0061:49
Refer to 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 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 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. |
Visual Inspection and Diagnostic Pre-checks
- Inspect for a damaged passenger safety belt or BTS
- Inspect for a damaged passenger seat cushion wiring harness
- Inspect for a loose or damaged OCSM or BTS connector
- Inspect for a damaged OCSM