Normal Operation

WARNING: This page is about a different car, the 2012 Ford Pickup, 2012 Ford F550 Super Duty, 2012 Ford F450 Super Duty, and 2012 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

The Restraints Control Module (RCM) monitors all deployable device and sensor circuits for a signal cross coupled (short) between circuits. If the RCM detects a short between the circuits of one device and another device, it stores a DTC for each of the signal cross coupled faults in memory. The RCM sends a message to the Instrument Panel Cluster (IPC) to illuminate the air bag warning indicator. When a normal loop fault is present (one loop is either shorted to battery/ground, open circuit or low resistance), signal cross coupled diagnostics are not active. Once the normal loop fault is repaired, the signal cross coupled diagnostics resume.

DTC Description	Fault Trigger Condition
B0001:2B - Driver Frontal Stage 1 Deployment Control: Signal Cross Coupled	If the RCM detects a short between the driver air bag module circuits and the circuits of another Supplemental Restraint System (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 air bag module circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B0020:2B - Left Side Airbag Deployment Control: Signal Cross Coupled	If the RCM detects a short between the driver seat side air bag module circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B0021:2B - Left Curtain Deployment Control: Signal Cross Coupled	If the RCM detects a short between the driver Safety Canopy® module circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B0028:2B - Right Side Airbag Deployment Control: Signal Cross Coupled	If the RCM detects a short between the passenger seat side air bag module circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B0029:2B - Right Curtain Deployment Control: Signal Cross Coupled	If the RCM detects a short between the passenger Safety Canopy® module 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 safety belt sensor circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B00DF:2B - Passenger Restraints Disable Switch: Signal Cross Coupled	If the RCM detects a short between the Passenger Air Bag Deactivation (PAD) circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B1211:2B - Driver Seatbelt Retractor Pretensioner Deployment Control: Signal Cross Coupled	If the RCM detects a short between the driver safety belt retractor pretensioner circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.
B1214:2B - Passenger Seatbelt Retractor Pretensioner Deployment Control: Signal Cross Coupled	If the RCM detects a short between the passenger safety belt retractor pretensioner circuits and the circuits of another SRS component, it sets this DTC and the DTC of the corresponding SRS component.

This pinpoint test is intended to diagnose the following:

Wiring, terminals or connectors
RCM