Diagnostic Instructions

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	Short to Ground	High Resistance	Open	Short to Voltage	Signal Performance
I/P Module Stage 1 High Circuit	B0018	B0018	B0017	B0018	B0016
I/P Module Stage 1 Low Circuit	B0018	B0018	B0017	B0018	B0016
I/P Module Stage 2 High Circuit	B0014	B0014	B0013	B0014	B0012
I/P Module Stage 2 Low Circuit	B0014	B0014	B0013	B0014	B0012

Circuit/System Description

During a side or frontal crash of sufficient force the inflatable restraint sensing and diagnostic module (SDM) will allow current to flow through the deployment loop in order to deploy the instrument panel (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. There are 2 shorting bars used within the I/P module connector which will short together both I/P module stage 1 high and low circuits, and both I/P module stage 2 high and low circuits, when the connector is disconnected. This will help to prevent unwanted deployment of the inflator module during servicing.

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

B0014 Stage 2 or B0018 Stage 1

Action Taken When the DTC Sets

Conditions for Clearing the DTC

Diagnostic Aids

If there is more than one DTC set diagnose the open DTC first.

Reference Information

Schematic Reference

SIR Schematics

Connector End View Reference

SIR Connector End Views

Electrical Information Reference

Special Tools Required

Circuit/System Testing

Important: When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector.

•	The I/P module

•	The SDM module

•	The I/P wiring harness connector

•	The SDM wiring harness connector

1. Ignition OFF, disconnect I/P module in-line connector.
2. Use J 38715-80 to connect the J 38715-A to the harness side of the I/P module in-line wiring harness connector. Use the PASSENGER INFLATOR and BASE of COLUMN connectors located on the load tool.
3. Ignition ON, use a scan tool to observe the SIR DTC display. Verify DTC B0012, B0013, B0014, B0016, B0017, or B0018 is current.

⇒	If DTC B0012, B0013, B0014, B0016, B0017, or B0018 is history replace the I/P module.

4. Ignition OFF, disconnect and remove the J 38715-A and adapter.
5. Disconnect the SDM harness connector.
6. Test the high and low circuits between the SDM and I/P module for a short to voltage, short to ground, an open, or low resistance. Verify that a short to voltage, short to ground, or open/low resistance does not exist.

⇒	If any of the above conditions are found make the appropriate repair.

7. If all circuits test normal then replace the SDM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.