PINPOINT TEST B : DTCs B0002:11, B0002:12, B0002:13 AND B0002:1A: Notes
Diagnostic Overview
Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Service Information for information about these practices.
Refer to Supplemental Restraint System , for schematic and connector information.
Normal Operation and Fault Conditions
The RCM continuously monitors the driver airbag stage 2 and circuits for the following faults:
- Resistance out of range
- Unexpected voltage
- Short to ground
- Faulted driver airbag
If a fault is detected, the RCM stores DTC B0002:11, B0002:12, B0002:13 or B0002:1A in memory and sends a message to the IPC to illuminate the airbag 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 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 the time of diagnosis. Following this direction helps make sure that minor changes in resistance do not create a repeat concern. This test uses process of elimination to diagnose each part of the deployment loop circuit including:
- Wiring
- Connections
- Clockspring
- Driver airbag
- RCM
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| B0002:11 | Driver Frontal Stage 2 Deployment Control: Circuit Short to Ground | A fault is indicated when the RCM senses a short to ground on either driver airbag stage 2 circuit for more than 6 seconds. |
| B0002:12 | Driver Frontal Stage 2 Deployment Control: Circuit Short to Battery | A fault is indicated when the RCM senses a short to voltage on either driver airbag stage 2 circuit for more than 6 seconds. |
| B0002:13 | Driver Frontal Stage 2 Deployment Control: Circuit Open | A fault is indicated when the RCM measures greater than the desired resistance range between driver airbag stage 2 circuits for more than 6 seconds. |
| B0002:1A | Driver Frontal Stage 2 Deployment Control: Circuit Resistance Below Threshold | A fault is indicated when the RCM measures less than the desired resistance range between driver airbag stage 2 circuits for more than 6 seconds. |
Possible Sources
- Wiring, terminals or connectors
- Clockspring
- Driver airbag
- RCM
Visual Inspection and Diagnostic Pre-checks
- Inspect for damaged wiring harness(es).
- Inspect for loose or damaged connectors.