B0013
DTC B0012 or B0013
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category
DTC Descriptors
DTC B0012 01
- Driver Steering Wheel Air Bag Deployment Loop Stage 1 Short to Battery
DTC B0012 02
- Driver Steering Wheel Air Bag Deployment Loop Stage 1 Short to Ground
DTC B0012 04
- Driver Steering Wheel Air Bag Deployment Loop Stage 1 Open
DTC B0012 0D
- Driver Steering Wheel Air Bag Deployment Loop Stage 1 High Resistance
DTC B0012 0E
- Driver Steering Wheel Air Bag Deployment Loop Stage 1 Low Resistance
DTC B0013 01
- Driver Steering Wheel Air Bag Deployment Loop Stage 2 Short to Battery
DTC B0013 02
- Driver Steering Wheel Air Bag Deployment Loop Stage 2 Short to Ground
DTC B0013 04
- Driver Steering Wheel Air Bag Deployment Loop Stage 2 Open
DTC B0013 0D
- Driver Steering Wheel Air Bag Deployment Loop Stage 2 High Resistance
DTC B0013 0E
- Driver Steering Wheel Air Bag Deployment Loop Stage 2 Low Resistance
Diagnostic Fault Information
Circuit/System Description
During a 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 driver steering wheel air bag. 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 driver steering wheel air bag coil connector which will short together both driver steering wheel air bag stage 1 control circuit and driver steering wheel air bag stage 1 control circuit and both driver steering wheel air bag stage 2 control circuit and driver steering wheel air bag stage 2 control circuit when the connector is disconnected. This will help to prevent unwanted deployment of the air bag during servicing.
Conditions for Running the DTC
Ignition voltage is between 9-16 V.
Conditions for Setting the DTC
B0012 01 stage 1 or B0013 01 stage 2
The driver steering wheel air bag control circuit is shorted to voltage for 2 seconds.
B0012 02 stage 1 or B0013 02 stage 2
The driver steering wheel air bag control circuit is shorted to ground for 2 seconds.
B0012 04 stage 1 or B0013 04 stage 2
The driver steering wheel air bag control circuit is open for 2 seconds.
B0012 0D stage 1 or B0013 0D stage 2
The driver steering wheel air bag deployment loop resistance is greater than 5.5 ohm for 2 seconds.
B0012 0E stage 1 or B0013 0E stage 2
The driver steering wheel air bag deployment loop resistance is less than 1.7 ohm for 2 seconds.
Action Taken When the DTC Sets
* The SDM requests the instrument panel cluster to illuminate the AIR BAG indicator.
* The SDM will store a DTC, however if an event occurs the system will still attempt deployment.
Conditions for Clearing the DTC
* The condition for setting the DTC is no longer exists.
* A history DTC will clear once 100 malfunction-free ignition cycles have occurred.
Reference Information
Schematic Reference
SIR Schematics ([1][2]Air Bag Systems)
Connector End View Reference
Component Connector End Views (Connector End Views By Name)
Description and Operation
SIR System Description and Operation (SIR System)
Electrical Information Reference
* Circuit Testing (Circuit Testing)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)
* Connector Repairs (Connector Repairs)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
Circuit/System Verification
Ignition ON, observe the appropriate scan tool Deployment Loop Resistance parameter. The reading should be between 1.8-5.12 ohm.
Note: When removing connectors, inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector:
* Driver steering wheel air bag
* SDM module
* Driver steering wheel air bag wiring harness connector
* SDM wiring harness connector
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the F107 driver steering wheel air bag.
2. Ignition OFF, disconnect the scan tool, wait 120 seconds, test for less than 1.0 ohm between the following control circuit terminals and ground:
* circuit terminal 2 X1
* circuit terminal 4 X1
• If greater than the specified range, test the control circuit for an open/high resistance. If the circuit tests normal, replace the K36 SDM.
3. Ignition ON, verify the scan tool Deployment Loop Resistance parameter is greater than 5.12 ohm.
• If less than the specified range, test control circuit terminals for a short to ground. If the circuit tests normal, replace the K36 SDM.
4. Install a 3 A fused jumper wire between the following control circuit terminals. Verify the scan tool Deployment Loop Resistance parameter is less than 1.8 ohm.
* circuit terminal 1 X1 and terminal 2 X1
* circuit terminal 4 X1 and terminal 3 X1
• If greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K36 SDM.
5. If all circuits test normal, test or replace the F107 driver steering wheel air bag.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Steering Wheel Inflatable Restraint Module Replacement (Steering Wheel Inflatable Restraint Module Replacement)
* SIR/SRS Wiring Repairs (SIR/SRS Wiring Repairs)
* Control Module References (Programming and Relearning) for SDM replacement, setup, and programming