B0014
DTC B0012, B0013, B0014, B0016, B0017, or B0018
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
- 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
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
* 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 more 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 requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.
* The SIR will store a DTC, however if an event occurs the system will still allow deployments.
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.
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 (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)
Scan Tool Reference
Control Module References (Programming and Relearning)for scan tool information.
Special Tools
* J 38715-A Driver and Passenger SIR Load Tool
* J 38715-80 Load Tool Adaptor
Circuit/System Testing
Important: When removing the connectors inspect for damage or corrosion. Damage or corrosion to the following requires repair or replacement of the affected component/connector:
* I/P module
* SDM module
* I/P wiring harness connector
* SDM wiring harness connector
Important: The connector and connector position assurance (CPA) may seat independent of each other. Both the connector and CPA should seat with an audible and/or tactile click. The CPA isolates the shorting-bars within the connector allowing the deployment circuit to operate properly.
1. Verify that the I/P module connector and the CPA are engaged.
• If the above condition is not found, make the appropriate repair.
2. Ignition OFF, disconnect harness connector at I/P inflatable restraint module.
3. Use J 38715-80 to connect the J 38715-A in place of the inflatable restraint module. Use the PASSENGER INFLATOR and BASE of COLUMN connectors located on the load tool.
4. 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 not set or set as history, cycle ignition OFF, disconnect the adapter and J 38715-A , reconnect the harness connector at the I/P inflatable restraint module, and cycle the ignition ON. If the DTC resets after reconnecting the module, replace the I/P inflatable restraint module.
5. Ignition OFF, disconnect and remove the J 38715-A and adapter.
6. Disconnect the SDM harness connector.
7. Ignition ON, test for less than 1 volt between the appropriate high control circuit listed below and ground:
* Stage 1 SDM terminal 6
* Stage 2 SDM terminal 10
• If not within the specified range, test the control circuit for a short to voltage.
8. Test for less than 1 volt between the appropriate low control circuit terminal listed below and ground:
* Stage 1 SDM terminal 7
* Stage SDM 2 terminal 11
• If not within the specified range, test the control circuit for a short to voltage.
9. Ignition OFF, test for infinite resistance between the appropriate high control circuit terminal listed below and ground:
* Stage 1 SDM terminal 6
* Stage 2 SDM terminal 10
• If not the specified value, test the control circuit for a short to ground.
10. Test for infinite resistance between the appropriate low control circuit terminal listed below and ground:
* Stage 1 SDM terminal 7
* Stage 2 SDM terminal 11
• If not the specified value, test the control circuit for a short to ground.
11. Test for less then 1 ohm between the appropriate high control circuit terminals listed below:
* Stage 1 SDM terminal 6 and the I/P module terminal A1
* Stage 2 SDM terminal 10 and the I/P module B1
• If not within the specified range, test the control circuit for an open/high resistance.
12. Test for less then 1 ohm between the appropriate low control circuit terminals listed below:
* Stage 1 SDM terminal 7 and the I/P module terminal A2
* Stage 2 SDM terminal 11 and the I/P module B2
• If not within the specified range, test the control circuit for an open/high resistance.
13. If all circuits test normal, replace the SDM.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Instrument Panel Inflatable Restraint Module Replacement (Instrument Panel Inflatable Restraint Module Replacement)
* SIR/SRS Wiring Repairs (SIR/SRS Wiring Repairs)
* Control Module References (Programming and Relearning)for SDM replacement, setup, and programming