B0013
DTC B0012, B0013, B0014, B0016, B0017, or B0018
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.
DTC Descriptors
DTC B0012
- Passenger Frontal Deployment Loop (Stage 2) Resistance Low
DTC B0013
- Passenger Frontal Deployment Loop (Stage 2) Open
DTC B0014
- Passenger Frontal Deployment Loop (Stage 2) Voltage Out of Range
DTC B0016
- Passenger Frontal Deployment Loop (Stage 1) Resistance Low
DTC B0017
- Passenger Frontal Deployment Loop (Stage 1) Open
DTC B0018
- Passenger Frontal Deployment Loop (Stage 1) Voltage Out of Range
Diagnostic Fault Information
Circuit/System Description
The passenger deployment loop consists of a dual stage inflatable restraint instrument panel (I/P) module. The I/P module high circuits, and the I/P module low circuits exist for both stages 1 and 2. There are 2 shorting bars used within the I/P module connector. These shorting bars short together the I/P module stage 1 high circuits, and low circuits, and the I/P module stage 2 high circuits and low circuits when the connector is disconnected. This prevents unwanted deployment of the inflator module during servicing. During a frontal crash of sufficient force the inflatable restraint sensing and diagnostic module (SDM) will allow current to flow through the deployment loop. This flow of current will deploy the I/P module. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity, and for shorts-to-ground or voltage. If a malfunction is detected, a diagnostic trouble code (DTC) will be stored in memory.
Conditions for Running the DTC
Ignition voltage is between 9-16 volts.
Conditions for Setting the DTC
B0012 stage 2 or B0016 stage 1
The I/P module deployment loop resistance is less than 1.3 ohms for 500 milliseconds.
B0013 stage 2 or B0017 stage 1
* The I/P module stage 1 or stage 2 high circuit is less than 2.4 volts and the I/P module stage 1 or stage 2 deployment loop is more than 6 ohms for 500 milliseconds.
* The I/P module stage 1 or stage 2 deployment loop resistance is greater than 4.8 ohms for 500 milliseconds.
B0014 stage 2 or B0018 stage 1
* The I/P module stage 1 or stage 2 high and/or low circuits is short to ground or short to voltage for 500 milliseconds.
* The I/P module stage 1 or stage 2 high circuit is less than 2.4 volts and I/P module stage 1 or stage 2 deployment loop resistance is less than 6 ohms for 500 milliseconds.
Action Taken When the DTC Sets
* The SDM commands the AIR BAG indicator ON.
* The SIR system is disabled and no deployments are allowed.
Conditions for Clearing the DTC
* The condition for setting the DTC no longer exists.
* A history DTC will clear once 100 malfunction-free ignition cycles have occurred.
Diagnostic Aids
If there is more than one DTC set diagnose the open DTC first. The following are possible causes of the malfunction:
* A short between the I/P module stage 1 or stage 2, high and low circuits
* An open or a high resistance in the I/P module stage 1 or stage 2, high or low circuits
* A short to ground or a short to voltage in the I/P module stage 1 or stage 2, high or low circuits
* A malfunctioning I/P module connector
* A malfunctioning SDM connector
* A malfunctioning I/P module
* A malfunctioning SDM
Reference Information
Schematic Reference
SIR Schematics ([1][2]Air Bag Systems)
Connector End View Reference
Component Connector End Views (Connector Views)
Electrical Information Reference
* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information.
Special Tools
* EL 38715-125 Load Tool Adapter
* J 38715-A Driver/Passenger Load tool
Circuit/System Testing
1. With the ignition OFF, disconnect I/P module in-line connector.
2. Inspect the component and wiring harness sides of the in-line connector for the I/P module for damage or corrosion.
• If the in-line connector for the I/P module is damaged, the I/P module must be replaced.
• If the I/P module wiring harness side connector is damaged, replace the harness side of the connector.
3. Use EL 38715-125 adapter to connect the J 38715-A SIR Driver/Passenger Load Tool to the harness side of the I/P module in-line wiring harness connector. Use the BASE of COLUMN and PASSENGER INFLATOR connectors located on the load tool.
4. With the ignition ON, use a scan tool to observe the SIR DTC display. Verify DTC B0012, B0013, B0014, B0016, B0017, or B0018 are set in history.
• If DTC B0012, B0013, B0014, B0016, B0017, or B0018 is history replace the I/P module.
5. With the ignition OFF, disconnect and remove the J 38715-A and adapter.
6. Remove the inflatable restraint sensing and diagnostic module (SDM) connector. Inspect the SDM connector for damage or corrosion that may cause a malfunction in the I/P module stage 1 or stage 2 high and/or low circuits.
• If damage or corrosion is found make the appropriate repair.
7. Test the high and low circuits between the SDM and I/P module for a short to voltage, short to ground, or open/low resistance.
• If circuits test good then replace the SDM.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* SIR/SRS Wiring Repairs (Component Tests and General Diagnostics)
* Inflatable Restraint Instrument Panel Module Replacement (Service and Repair)
* Control Module References (Programming and Relearning) for SDM replacement, setup, and programming