Normal Operation and Fault Conditions
WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.
The RCM monitors all deployable device and sensor circuits for a signal cross coupled (short) between components. Signal cross coupled DTCs are present when one or both circuits of a component are shorted to one or both circuits of another component. Signal cross coupled DTCs do not set when the circuits of a single device are shorted together, a different DTC is present (for example, a DTC for circuit resistance below threshold). The RCM sends a message to the IPC to illuminate the airbag warning indicator. When a normal loop fault is present (one loop is either shorted to battery/ground, open circuit or low resistance), then signal cross coupled diagnostics are not active. Once the normal loop fault is repaired, the signal cross coupled diagnostics resume.
PPT AE RCM DTC FAULT TRIGGER CONDITIONS
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| B0001:2B | Driver Frontal Stage 1 Deployment Control: Signal Cross Coupled | If the RCM detects a short between the driver airbag stage 1 circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B0002:2B | Driver Frontal Stage 2 Deployment Control: Signal Cross Coupled | If the RCM detects a short between the driver airbag stage 2 circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B0004:2B | Driver Knee Bolster Deployment Control: Signal Cross Coupled | If the RCM detects a short between the driver lower airbag circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B0010:2B | Passenger Frontal Stage 1 Deployment Control: Signal Cross Coupled | If the RCM detects a short between the passenger airbag stage 1 circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B0011:2B | Passenger Frontal Stage 2 Deployment Control: Signal Cross Coupled | If the RCM detects a short between the passenger airbag stage 2 circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B0050:2B | Driver Seatbelt Sensor: Signal Cross Coupled | If the RCM detects a short between the driver seatbelt buckle switch circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B0052:2B | Passenger Seatbelt Sensor: Signal Cross Coupled | If the RCM detects a short between the passenger seatbelt buckle switch circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B0070:2B | Driver Seatbelt Pretensioner "A" Deployment Control: Signal Cross Coupled | If the RCM detects a short between the driver seatbelt anchor pretensioner circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B0072:2B | Passenger Seatbelt Pretensioner "A" Deployment Control: Signal Cross Coupled | If the RCM detects a short between the passenger seatbelt anchor pretensioner circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B007E:2B | Driver Seatbelt Pretensioner "C" Deployment Control: Signal Cross Coupled | If the RCM detects a short between the driver seatbelt retractor pretensioner circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B007F:2B | Passenger Seatbelt Pretensioner "C" Deployment Control: Signal Cross Coupled | If the RCM detects a short between the passenger seatbelt retractor pretensioner circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B0082:2B | Passenger Seatbelt Load Limiter Deployment Control: Signal Cross Coupled | If the RCM detects a short between the passenger seatbelt load limiter circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B00B5:2B | Driver Seat Track Position Restraints Sensor: Signal Cross Coupled | If the RCM detects a short between the driver seat track position sensor circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B00C5:2B | Passenger Seat Track Position Restraints Sensor: Signal Cross Coupled | If the RCM detects a short between the passenger seat track position sensor circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B11CF:2B | Passenger Frontal Airbag Canister Vent: Signal Cross Coupled | If the RCM detects a short between the passenger airbag canister vent circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B1404:2B | Driver Side Airbag Deployment Control: Signal Cross Coupled | If the RCM detects a short between the driver side airbag circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B1405:2B | Driver Curtain Deployment Control 1: Signal Cross | Coupled If the RCM detects a short between the left side air curtain circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B1407:2B | Passenger Side Airbag Deployment | Control: Signal Cross Coupled If the RCM detects a short between the front passenger side airbag circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B1408:2B | Passenger Curtain Deployment Control 1: Signal Cross Coupled | If the RCM detects a short between the right side air curtain circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B1413:2B | Driver Frontal Restraints Sensor: Signal Cross Coupled | If the RCM detects a short between the left frontal restraints sensor circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B1414:2B | Driver Side Restraints Sensor 1: Signal Cross Coupled | If the RCM detects a short between the right C-pillar or driver front door restraints sensor circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B1417:2B | Right Frontal Restraints Sensor: Signal Cross Coupled | If the RCM detects a short between the right frontal restraints sensor circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B1418:2B | Passenger Side Restraints Sensor 1: Signal Cross Coupled | If the RCM detects a short between the left second row or passenger front door restraints sensor circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B0001:2B | Driver Frontal Stage 1 Deployment Control: Signal Cross Coupled | If the RCM detects a short between the driver airbag stage 1 circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B0002:2B | Driver Frontal Stage 2 Deployment Control: Signal Cross Coupled | If the RCM detects a short between the driver airbag stage 2 circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B0005:2B | Collapsible Steering Column Deployment Control: Signal Cross Coupled | If the RCM detects a short between the deployable steering column circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B0010:2B | Passenger Frontal Stage 1 Deployment Control: Signal Cross Coupled | If the RCM detects a short between the passenger airbag stage 1 circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B0011:2B | Passenger Frontal Stage 2 Deployment Control: Signal Cross Coupled | If the RCM detects a short between the passenger airbag stage 2 circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B0050:2B | Driver Seatbelt Sensor: Signal Cross Coupled | If the RCM detects a short between the driver seatbelt buckle switch circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B0052:2B | Passenger Seatbelt Sensor: Signal Cross Coupled | If the RCM detects a short between the passenger seatbelt buckle switch circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B0054:2B | Second Row Center Seatbelt Sensor: Signal Cross Coupled | If the RCM detects a short between the second row center seatbelt buckle switch circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B0057:2B | Third Row Center Seatbelt Sensor: Signal Cross Coupled | If the RCM detects a short between the third row center seatbelt buckle switch circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B0070:2B | Driver Seatbelt Pretensioner "A" Deployment Control: Signal Cross Coupled | If the RCM detects a short between the driver seatbelt anchor pretensioner circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B0072:2B | Passenger Seatbelt Pretensioner "A" Deployment Control: Signal Cross Coupled | If the RCM detects a short between the passenger seatbelt anchor pretensioner circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B007E:2B | Driver Seatbelt Pretensioner "C" Deployment Control: Signal Cross Coupled | If the RCM detects a short between the driver seatbelt retractor pretensioner circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B007F:2B | Passenger Seatbelt Pretensioner "C" Deployment Control: Signal Cross Coupled | If the RCM detects a short between the passenger seatbelt retractor pretensioner circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B0082:2B | Passenger Seatbelt Load Limiter Deployment Control: Signal Cross Coupled | If the RCM detects a short between the passenger seatbelt retractor load limiter circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B00B5:2B | Driver Seat Track Position Restraints Sensor: Signal Cross Coupled | If the RCM detects a short between the left seat track position sensor circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B00C5:2B | Passenger Seat Track Position Restraints Sensor: Signal Cross Coupled | If the RCM detects a short between the right seat track position sensor circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B11CF:2B | Passenger Frontal Airbag Canister Vent: Signal Cross Coupled | If the RCM detects a short between the passenger airbag canister vent circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B1404:2B | Driver Side Airbag Deployment Control: Signal Cross Coupled | If the RCM detects a short between the driver side airbag circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B1405:2B | Driver Curtain Deployment Control 1: Signal Cross Coupled | If the RCM detects a short between the left side air curtain circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B1407:2B | Passenger Side Airbag Deployment Control: Signal Cross Coupled | If the RCM detects a short between the passenger side airbag circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B1408:2B | Passenger Curtain Deployment Control 1: Signal Cross Coupled | If the RCM detects a short between the right side air curtain circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B140C:2B | Second Row Driver Side Seatbelt Sensor: Signal Cross Coupled | If the RCM detects a short between the second row left seatbelt buckle sensor circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B140D:2B | Second Row Passenger Side Seatbelt Sensor: Signal Cross Coupled | If the RCM detects a short between the second row right seatbelt buckle sensor circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B140E:2B | Third Row Driver Side Seatbelt Sensor: Signal Cross Coupled | If the RCM detects a short between the second row left seatbelt buckle sensor circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B140F:2B | Third Row Passenger Side Seatbelt Sensor: Signal Cross Coupled | If the RCM detects a short between the third row right seatbelt buckle sensor circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B1413:81 | Driver Frontal Restraints Sensor: Invalid Serial Data Received | If the RCM detects a short between the driver front impact sensor circuit and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B1414:81 | Driver Side Restraints Sensor 1: Invalid Serial Data Received | If the RCM detects a short between the driver front door side impact sensor circuit and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B1415:81 | Driver Side Restraints Sensor 2: Invalid Serial Data Received | If the RCM detects a short between the driver C-pillar side impact sensor circuit and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B1417:81 | Passenger Frontal Restraints Sensor: Invalid Serial Data Received | If the RCM detects a short between the passenger front impact sensor circuit and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B1418:81 | Passenger Side Restraints Sensor 1: Invalid Serial Data Received | If the RCM detects a short between the passenger front door side impact sensor circuit and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B1419:81 | Passenger Side Restraints Sensor 2: Invalid Serial Data Received | If the RCM detects a short between the passenger C-pillar side impact sensor circuit and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B141B:2B | Second Row Driver Side Inflatable Seatbelt Deployment Control: Signal Cross Coupled | If the RCM detects a short between the third row left seatbelt inflator circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B141C:2B | Second Row Passenger Side Inflatable Seatbelt Deployment Control: Signal Cross Coupled | If the RCM detects a short between the second row right seatbelt inflator circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B1517:2B | Third Row Driver Side Inflatable Seatbelt Deployment Control: Signal Cross Coupled | If the RCM detects a short between the third row left seatbelt inflator circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |
| B1518:2B | Third Row Passenger Side Inflatable Seatbelt Deployment Control: Signal Cross Coupled | If the RCM detects a short between the third row right seatbelt inflator circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component. |