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Home >> Ford >> 2012 >> Mustang Base, 2D Coupe, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 453 (Supplemental Restraint System) >> Diagnosis And Testing >> Airbag and Safety Belt Pretensioner Supplemental Restraint System (SRS) >> Pinpoint Test - Restraints Control Module (RCM) >> Pinpoint Test C: DTCs B0002:11, B0002:12, B0002:13 and B0002:1A >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2013 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.

The Restraints Control Module (RCM) continuously monitors the driver air bag module stage 2 and circuits for the following faults:

If a fault is detected, the RCM will store DTC B0002:11, B0002:12, B0002:13 or B0002:1A in memory and send a message to the Instrument Panel Cluster (IPC) to illuminate the air bag warning indicator.

The RCM analyzes the deployment loop resistance to determine if a fault exists. The value displayed in the PID is the deployment loop resistance as measured by the RCM. If the value displayed is lower or higher than the desired range (refer to diagram below), the RCM can set a DTC. As the deployment loop resistance drifts farther outside the desired range, the chance for a DTC increases. Small variations in resistance can occur due to the effect of road vibrations on terminal fit. Crimps and terminals can be affected by stress and harness movement and can cause an increase in resistance due to wire strain. These variables can result in an intermittent fault. For this reason, the test requires the PID value to be within the desired range before the fault is considered repaired, regardless if the module is reporting an on-demand DTC at time of diagnosis. Following this direction will help make sure that minor changes in resistance do not create a repeat concern. This test uses a process of elimination to diagnose each part of the deployment loop circuit including:

DTC FAULT TRIGGER CONDITIONS

DTC Description Fault Trigger Condition
  • B0002:11 - Driver Frontal Stage 2 Deployment Control: Circuit Short to Ground
 When the RCM senses a short to ground on either driver air bag stage 2 circuit, a fault will be indicated.
  • B0002:12 - Driver Frontal Stage 2 Deployment Control: Circuit Short to Battery
 When the RCM senses a short to voltage on either driver air bag stage 2 circuit, a fault will be indicated.
  • B0002:13 - Driver Frontal Stage 2 Deployment Control: Circuit Open
 When the RCM measures greater than the desired resistance range between driver air bag stage 2 circuits, a fault will be indicated.
  • B0002:1A - Driver Frontal Stage 2 Deployment Control: Circuit Resistance Below Threshold
 When the RCM measures less than the desired resistance range between driver air bag stage 2 circuits, a fault will be indicated.

This pinpoint test is intended to diagnose the following: 

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