B0124

DTC B0012-B0019, B0027-B0030, B0039-B0041, B0045, B0046, B0056-B0076, B0085-B0089, B0106-B0114, B0118-B0124, or B3850-B3854

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

DTC B0028
- Passenger Front Side Deployment Loop Resistance Low

DTC B0029
- Passenger Front Side Deployment Loop Open

DTC B0030
- Passenger Front Side Deployment Loop Voltage Out of Range

DTC B0040
- Driver Front Side Deployment Loop Resistance Low

DTC B0041
- Driver Front Side Deployment Loop Open

DTC B0045
- Driver Front Side Deployment Loop Voltage Out of Range

DTC B0057
- Passenger Front Pretensioner Deployment Loop Resistance Low

DTC B0058
- Passenger Front Pretensioner Deployment Loop Open

DTC B0059
- Passenger Front Pretensioner Deployment Loop Voltage Out of Range

DTC B0064
- Driver Front Pretensioner Deployment Loop Resistance Low

DTC B0065
- Driver Front Pretensioner Deployment Loop Open

DTC B0066
- Driver Front Pretensioner Deployment Loop Voltage Out of Range




Diagnostic Fault Information






Circuit/System Description

If a malfunction is detected, a DTC will be stored in non-volatile memory. 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 airbag module. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity, shorts to ground, and shorts voltage. There are 2 shorting bars used within the module connector which will short together both 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

B0014, B0019, B0030, B0045, B0059, B0066

The airbag module high and/or low circuit is short to ground for 120 milliseconds.


B0013, B0017, B0029, B0041, B0058, B0065
* The airbag module stage 1 or stage 2 high circuit is less than 2.4 volts and the airbag module stage 1 or stage 2 deployment loop is more than 6 ohms for 500 milliseconds.
* The airbag module stage 1 or stage 2 deployment loop resistance is more than 4.8 ohms for 500 milliseconds.



B0014, B0019, B0030, B0045, B0059, B0066
* The airbag module stage 1 or stage 2 high and/or low circuits is short to ground or short to voltage for 500 milliseconds.
* The airbag module stage 1 or stage 2 high circuit is less than 2.4 volts and the airbag module stage 1 or stage 2 deployment loop resistance is less than 6 ohms for 500 milliseconds.


B0014, B0019, B0030, B0045, B0059, B0066

The airbag module high and/or low circuit is short to voltage for 120 milliseconds.

B0012, B0016, B0028, B0040, B0057, B0064

The airbag module deployment loop resistance is less than 1.3 ohms for 500 milliseconds.


Action Taken When the DTC Sets

* The SDM commands the AIR BAG indicator ON via serial data communications.
* The SIR System is disabled and no deployments are allowed.



Conditions for Clearing the DTC

* The condition responsible for setting the DTC no longer exists.
* A history DTC will clear once 255 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 Views)
Description and Operation

SIR System Description and Operation (Description and Operation)
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)
* SIR/SRS Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information
Special Tools

J 38715-A Driver and Passenger SIR Load Tool


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 pretensioner

* The airbag module

* The SDM module

* The airbag wiring harness connector

* The SDM wiring harness connector




1. Ignition OFF, disconnect the harness connector at the applicable airbag module.
2. With the applicable adaptor, connect special tool J 38715-A .
3. Ignition ON, with a scan tool, verify DTC is set as current.

• If DTC is not set or is set as history, replace the applicable airbag module.

4. Ignition OFF, disconnect special tool J 38715-A and the applicable adaptor.
5. Disconnect the harness connector at the SDM.
6. Ignition ON, test for less than 1 volt between the applicable HI circuit terminal 1 and ground.

• If not the specified range, test the circuit for a short to voltage.

7. Test for less than 1 volt between the applicable LOW circuit terminal and ground.

• If not the specified range, test the circuit for a short to voltage.

8. Ignition OFF, test for infinite resistance between the applicable HI circuit terminal 1 and ground.

• If not the specified range, test the circuit for a short to ground.

9. Test for infinite resistance between the applicable LOW circuit terminal 2 and ground.

• If not the specified range, test the circuit for a short to ground.

10. Test for less then 1 ohm between the SDM connector and the airbag module connector HI circuit.

• If not the specified range, test the circuit for an open/high resistance.

11. Test for less then 1 ohm between the SDM connector and the airbag module connector LOW circuit terminal.

• If not the specified range, test the circuit for an open/high resistance.

12. If all circuits test normal, replace the SDM.



Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Inflatable Restraint Instrument Panel Module Replacement (Service and Repair)
* Inflatable Restraint Side Impact Module Replacement - Front (Service and Repair)
* Inflatable Restraint Side Impact Module Wiring Harness Replacement (Service and Repair)
* Seat Belt Buckle Pretensioner Replacement (Removal and Replacement)
* Control Module References (Programming and Relearning) for SDM replacement, setup, and programming