Pinpoint Test D: DTCs B0004:11, B0004:12, B0004:13 and B0004:1A

Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS)

Refer to Wiring Diagram Set 46 for schematic and connector information. [1][2]Diagrams By Number





Pinpoint Test - Supplemental Restraint System (SRS)

Pinpoint Test D: DTCs B0004:11, B0004:12, B0004:13 and B0004:1A

Refer to Wiring Diagram Set 46, Supplemental Restraint System for schematic and connector information. [1][2]Diagrams By Number

Normal Operation
The Restraints Control Module (RCM) continuously monitors the driver knee bolster air bag module and circuits for the following faults:

- Resistance out of range
- Unexpected voltage
- Short to ground
- Faulted driver knee bolster air bag module
If a fault is detected, the RCM (Restraints Control Module) will store DTC B0004:11, B0004:12, B0004:13 or B0004:1A in memory and send a message to the Instrument Panel Cluster (IPC) to illuminate the air bag warning indicator.
The RCM (Restraints Control Module) analyzes the deployment loop resistance and uses this measurement in combination with an age correction factor to determine if a fault exists. The value displayed in the PID is the deployment loop resistance as measured by the RCM (Restraints Control Module). If the value displayed is lower or higher than the desired range (refer to diagram below), the RCM (Restraints Control Module) can set a DTC. As the deployment loop resistance drifts farther outside the desired range, the chance for a DTC increases. The RCM (Restraints Control Module) fault trigger threshold may vary as the vehicle ages. Small variations in resistance can occur due to the effect of road vibrations on terminal fit and/or temperature changes. These variables can result in an intermittent fault. For this reason, the test will require 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 will use a process of elimination to diagnose each part of the deployment loop circuit including:

- Wiring
- Connections
- Driver knee bolster air bag module
- RCM (Restraints Control Module)











This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- Driver knee bolster air bag module
- RCM (Restraints Control Module)