B0014
DTC B0014, B0021, B0031, or B0038
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 B0014 01
- Driver Seat Side Air Bag Deployment Loop Short to Battery
DTC B0014 02
- Driver Seat Side Air Bag Deployment Loop Short to Ground
DTC B0014 04
- Driver Seat Side Air Bag Deployment Loop Open
DTC B0014 0D
- Driver Seat Side Air Bag Deployment Loop High Resistance
DTC B0014 0E
- Driver Seat Side Air Bag Deployment Loop Low Resistance
DTC B0021 01
- Passenger Seat Side Air Bag Deployment Loop Short to Battery
DTC B0021 02
- Passenger Seat Side Air Bag Deployment Loop Short to Ground
DTC B0021 04
- Passenger Seat Side Air Bag Deployment Loop Open
DTC B0021 0D
- Passenger Seat Side Air Bag Deployment Loop High Resistance
DTC B0021 0E
- Passenger Seat Side Air Bag Deployment Loop Low Resistance
DTC B0031 01
- Left Rear Seat Side Air Bag Deployment Loop Short to Battery
DTC B0031 02
- Left Rear Seat Side Air Bag Deployment Loop Short to Ground
DTC B0031 04
- Left Rear Seat Side Air Bag Deployment Loop Open
DTC B0031 0D
- Left Rear Seat Side Air Bag Deployment Loop High Resistance
DTC B0031 0E
- Left Rear Seat Side Air Bag Deployment Loop Low Resistance
DTC B0038 01
- Right Rear Seat Side Air Bag Deployment Loop Short to Battery
DTC B0038 02
- Right Rear Seat Side Air Bag Deployment Loop Short to Ground
DTC B0038 04
- Right Rear Seat Side Air Bag Deployment Loop Open
DTC B0038 0D
- Right Rear Seat Side Air Bag Deployment Loop High Resistance
DTC B0038 0E
- Right Rear Seat Side Air Bag Deployment Loop Low Resistance
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 an air bag. There are 2 shorting bars used within the connector that will short the control circuits together when the connector is disconnected. This will help to prevent unwanted deployment of the air bag or retractor pretensioner during servicing.
Conditions for Running the DTC
Ignition voltage is between 9-16 V.
Conditions for Setting the DTC
B0014 01, B0021 01, B0031 01, B0038 01
The air bag control circuit is shorted to voltage for 2 seconds.
B0014 02, B0021 02, B0031 02, B0038 02
The air bag control circuit is shorted to ground for 2 seconds.
B0014 04, B0021 04, B0031 04, B0038 04
The air bag control circuit is open for 2 seconds.
B0014 0D, B0021 0D, B0031 0D, B0038 0D
The air bag deployment loop resistance is greater than 4.2 ohm for 2 seconds.
B0014 0E, B0021 0E, B0031 0E, B0038 0E
The air bag deployment loop resistance is less than 1.4 ohm for 2 seconds.
Action Taken When the DTC Sets
* The SDM requests the instrument cluster to illuminate the AIR BAG indicator.
* The SDM will store a DTC, however if an event occurs the system will still attempt 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 Aid
Note: The following diagnostic aids apply for both current and history DTCs.
An incorrectly installed connector position assurance (CPA) or incorrectly seated connector can cause a shorting bar to short both control circuits together. Check the connectors and CPAs if a DTC with symptom byte 02 or 0E is set, to ensure the shorting bars are not causing the circuits to be shorted together. Shorting bars are used in the locations listed below:
* Left and rear seat side air bags
* Left and right roof rail air bags
* Inline harness connectors
* Harness side of the SDM connector
Terminal fretting or incorrectly seated connector can cause an open/high resistance condition. Check the circuit terminals for fretting or incorrectly seated connector if a DTC with symptom byte 04 or 0D is set. DTCs of deployment loops which are in the seat can occur because of stress or damage to the harness due to seat movement. Move the seat to the full extent of travel while using the scan tool to observe deployment type loop parameters.
If the retractor pretensioner, passenger instrument panel air bags, knee air bags, roof rail air bags, or seat side air bag has inflated under unexpected conditions and/or DTC with symptom byte 01 is set, check both control circuits for a short to voltage.
Reference Information
Schematic Reference
SIR Schematics [1][2]Air Bag Systems
Connector End View Reference
Component Connector End Views Sunshade - Left (D6I)
Description and Operation
SIR System Description and Operation Description and Operation
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 Control Module References for scan tool information
Circuit/System Verification
Note: Refer to SIR Service Precautions Technician Safety Information.
Inspect all terminals for damage or corrosion when disconnecting connectors. Damage or corrosion in the following requires repair or replacement of the affected component/connector.
* Seat belt retractor pretensioner
* Passenger instrument panel air bag
* Knee air bag
* Seat air bag
* Roof rail air bag
* SDM
* All wiring harness connectors
* SDM wiring harness connector
Note: 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.
If the condition is intermittent or cannot be duplicated, disconnect the connectors and add Nyogel lubricant 760G. This procedure will correct the high resistance condition due to terminal fretting corrosion.
1. Verify the appropriate scan tool Deployment Loop Resistance parameters stay consistently between 2.1-4.0 ohm without any spikes or dropouts while moving the harness near each connector.
* F106 Seat air bag
* Any inline harness connector
* K36 inflatable restraint sensing and diagnostic module
• If less than 2.1 ohm or greater than 4.0 ohm
Refer to Circuit/System Testing.
• If there are spikes or dropouts, perform the following
* Inspect each connector terminal and harness for damage or corrosion and repair as necessary
* Apply Nyogel lubricant 760G to each connector terminal
* Ensure each connector and CPA is correctly seated.
• If between 2.1-4.0 ohm without any spikes or dropouts
2. All OK
Circuit/System Testing
1. Ignition OFF, scan tool disconnected, disconnect the appropriate F106 seat air bag harness connector. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for greater than 25 ohm between the control circuit terminals 1 and 2.
• If 25 ohm or less
1. Disconnect the X2 harness connector at the K36 inflatable restraint sensing and diagnostic module.
2. Test for infinite resistance between the two control circuits.
• If less than infinite resistance, repair the short between the two circuits.
• If infinite resistance, replace the K36 inflatable restraint sensing and diagnostic module.
• If greater than 25 ohm
3. Ignition ON.
4. Test for less than 11 V between each control circuit terminal listed below and ground:
* Control circuit terminal 1
* Control circuit terminal 2
• If 11 V or greater
1. Ignition OFF, disconnect the X2 harness connector at the K36 inflatable restraint sensing and diagnostic module, ignition ON.
2. Test for less than 1 V between the control circuit and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V, replace the K36 inflatable restraint sensing and diagnostic module.
• If less than 11 V
5. Ignition OFF.
6. Test for greater than 25 ohm between each control circuit terminal listed below and ground:
* Control circuit terminal 1
* Control circuit terminal 2
• If 25 ohm or less
1. Disconnect the X2 harness connector at the K36 inflatable restraint sensing and diagnostic module.
2. Test for infinite resistance between the control circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the K36 inflatable restraint sensing and diagnostic module.
• If greater than 25 ohm
7. Install a 3 A fused jumper wire between the control circuit terminals 1 and 2. Ignition ON.
8. Verify the scan tool Deployment Loop Resistance parameter is less than 2 ohm.
• If 2 ohm or greater
1. Ignition OFF, disconnect the X2 harness connector at the K36 inflatable restraint sensing and diagnostic module.
2. Test for less than 2 ohm in each control circuit end to end.
• If 2 ohm or greater, repair the open/high resistance in the circuit.
• If less than 2 ohm, replace the K36 inflatable restraint sensing and diagnostic module.
• If less than 2 ohm
9. Add Nyogel lubricant 760G to the terminals at the F106 seat air bag harness connector. This will correct a high resistance condition due to terminal fretting corrosion.
10. Ignition OFF, connect the harness connector at the F106 seat air bag, ignition ON.
11. Verify DTC B0014, B0021, B0031, or B0038 is not set.
• If DTC B0014, B0021, B0031, or B0038 is set
Replace the F106 seat air bag.
• If DTC B0014, B0021, B0031, or B0038 is not set
12. All OK.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Driver or Passenger Seat Side Inflatable Restraint Module Replacement Driver or Passenger Seat Side Inflatable Restraint Module Replacement
* Rear Seat Side Inflatable Restraint Module Replacement Rear Seat Side Inflatable Restraint Module Replacement
* Control Module References Control Module References for SDM replacement, programming and setup