DTC B0014, B0021, B0031, or B0038
|
|
DTC B0014, B0021, B0031, or B0038
|
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
|
Diagnostic Fault Information
|
|
Circuit
|
Short to Ground
|
High Resistance
|
Open
|
Short to Voltage
|
Signal Performance
|
|
Left Side Air Bag High Control
|
B0014 02, B0014 0E
|
B0014 0D
|
B0014 04, B0014 0D
|
B0014 01
|
-
|
|
Left Side Air Bag Low Control
|
B0014 02, B0014 0E
|
B0014 0D
|
B0014 04, B0014 0D
|
B0014 01
|
-
|
|
Right Side Air Bag High Control
|
B0021 02, B0021 0E
|
B0021 0D
|
B0021 04, B0021 0D
|
B0021 01
|
-
|
|
Right Side Air Bag Low Control
|
B0021 02, B0021 0E
|
B0021 0D
|
B0021 04, B0021 0D
|
B0021 01
|
-
|
|
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 together the control circuits, 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
The air bag control circuit is shorted to voltage for 2 seconds.
B0014 02, B0021 02
The air bag control circuit is shorted to ground for 2 seconds.
B0014 04, B0021 04
The air bag control circuit is open for 2 seconds.
B0014 0D, B0021 0D
The air bag deployment loop resistance is greater than 4.2 Ω for 2 seconds.
B0014 0E, B0021 0E
The air bag deployment loop resistance is less than 1.4 Ω 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 responsible for setting the DTC no longer exists.
|
|
•
|
A history DTC will clear once 100 malfunction-free ignition cycles have occurred.
|
|
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 right 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 corrosion 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, 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.
Schematic Reference
SIR Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
SIR System Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References
for scan tool information
|
Circuit/System Verification
|
|
Note
|
|
Refer to
SIR Service Precautions
.
|
|
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
|
|
•
|
Side 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. The connector and connector position assurance (CPA) may seat independently 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 and 4.0 Ω without any spikes or dropouts while moving the harness near each connector.
|
|
|
•
|
Any inline harness connector
|
|
2.
|
If less than 2.1 or greater than 4.0 Ω
Refer to Circuit/System Testing.
|
|
3.
|
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.
|
|
4.
|
If within 2.1 and 4.0 Ω without any spikes or dropouts
|
|
1.
|
Ignition OFF, disconnect the scan tool and then disconnect the appropriate F106 side air bag harness connector. It may take up to 2 minutes for all vehicle systems to power down.
|
|
2.
|
Test for greater than 25 Ω between the control circuit terminals 1 and 2.
|
|
|
3.1.
|
Disconnect the X2 harness connector at the K36 SDM.
|
|
|
3.2.
|
Test for infinite resistance between the two control circuits.
|
|
|
3.3.
|
If less than infinite resistance, repair the short between the two circuits.
|
|
|
3.4.
|
If infinite resistance, replace the K36 SDM.
|
|
6.
|
Test for less than 11 V between the control circuit terminals listed below and ground:
|
|
|
•
|
Control circuit terminal 1
|
|
|
•
|
Control circuit terminal 2
|
|
|
7.1.
|
Ignition OFF, disconnect the X2 harness connector at the K36 SDM, ignition ON.
|
|
|
7.2.
|
Test for less than 1 V between the control circuit and ground.
|
|
|
7.3.
|
If 1 V or greater, repair the short to voltage on the circuit.
|
|
|
7.4.
|
If less than 1 V, replace the K36 SDM.
|
|
10.
|
Test for greater than 25 Ω between the control circuit terminals listed below and ground:
|
|
|
•
|
Control circuit terminal 1
|
|
|
•
|
Control circuit terminal 2
|
|
|
11.1.
|
Disconnect the X2 harness connector at the K36 SDM.
|
|
|
11.2.
|
Test for infinite resistance between the control circuit and ground.
|
|
|
11.3.
|
If less than infinite resistance, repair the short to ground on the circuit.
|
|
|
11.4.
|
If infinite resistance, replace the K36 SDM.
|
|
13.
|
Ignition OFF, install a 3 A fused jumper wire between the control circuit terminals 1 and 2, Ignition ON.
|
|
14.
|
Verify the scan tool Deployment Loop Resistance parameter is less than 2 Ω.
|
|
|
15.1.
|
Ignition OFF, disconnect the X2 harness connector at the K36 SDM.
|
|
|
15.2.
|
Test for less than 2 Ω in each control circuit end to end.
|
|
|
15.3.
|
If 2 Ω or greater, repair the open/high resistance in the circuit.
|
|
|
15.4.
|
If less than 2 Ω, replace the K36 SDM.
|
|
17.
|
Replace the appropriate F106 side air bag.
|
Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
