DTC B0016, B0018, B0023, or B0025
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DTC B0016, B0018, B0023, or B0025
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DTC B0016 01
Left Roof Rail Air Bag Deployment Loop Short to Battery
DTC B0016 02
Left Roof Rail Air Bag Deployment Loop Short to Ground
DTC B0016 04
Left Roof Rail Air Bag Deployment Loop Open
DTC B0016 0D
Left Roof Rail Air Bag Deployment Loop High Resistance
DTC B0016 0E
Left Roof Rail Air Bag Deployment Loop Low Resistance
DTC B0023 01
Right Roof Rail Air Bag Deployment Loop Short to Battery
DTC B0023 02
Right Roof Rail Air Bag Deployment Loop Short to Ground
DTC B0023 04
Right Roof Rail Air Bag Deployment Loop Open
DTC B0023 0D
Right Roof Rail Air Bag Deployment Loop High Resistance
DTC B0023 0E
Right Roof Rail Air Bag Deployment Loop Low Resistance
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Diagnostic Fault Information
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Circuit
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Short to Ground
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High Resistance
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Open
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Short to Voltage
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Signal Performance
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Left Roof Rail Air Bag High Control
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B0016 02, B0016 0E
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B0016 0D
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B0016 04, B0016 0D
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B0016 01
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-
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Left Roof Rail Air Bag Low Control
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B0016 02, B0016 0E
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B0016 0D
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B0016 04, B0016 0D
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B0016 01
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-
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Right Roof Rail Air Bag High Control
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B0023 02, B0023 0E
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B0023 0D
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B0023 04, B0023 0D
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B0023 01
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-
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Right Roof Rail Air Bag Low Control
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B0023 02, B0023 0E
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B0023 0D
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B0023 04, B0023 0D
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B0023 01
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-
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Circuit/System Description
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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 or pretensioner. There are 2 shorting bars which will short together control circuits, when the connector is disconnected. This will help to prevent unwanted deployment of the air bag or pretensioner during servicing.
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Conditions for Running the DTC
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Ignition voltage is between 9-16 V.
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Conditions for Setting the DTC
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B0016 01, B0023 01
The air bag control circuit is shorted to voltage for 2 seconds.
B0016 02, B0023 02
The air bag control circuit is shorted to ground for 2 seconds.
B0016 04, B0023 04
The air bag control circuit is open for 2 seconds.
B0016 0D, B0023 0D
The air bag deployment loop resistance is greater than 4.2 Ω for 2 seconds.
B0016 0E, B0023 0E
The air bag deployment loop resistance is less than 1.4 Ω for 2 seconds.
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Action Taken When the DTC Sets
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The SDM requests the instrument cluster to illuminate the AIR BAG indicator.
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The SDM will store a DTC, however if an event occurs the system will still attempt deployments.
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Conditions for Clearing the DTC
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The condition responsible for setting the DTC no longer exists.
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A history DTC will clear once 100 malfunction-free ignition cycles have occurred.
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Note
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The following diagnostic aids apply for both current and history DTCs.
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An incorrectly installed 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:
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Passenger instrument panel air bag
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Driver and passenger side air bags
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•
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Left and right roof rail air bags
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•
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Driver and passenger retractor pretensioners
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Inline connectors - on the side of the harness connector
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•
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Harness side of the SDM connector
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Terminal fretting or incorrectly seated connectors 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 extend of travel while using the scan tool to observe deployment type loop parameters.
If the pretensioner, passenger instrument panel air bags or 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
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Circuit/System Verification
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Note
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Refer to
SIR Service Precautions
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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.
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Seat belt retractor pretensioner
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•
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Passenger instrument panel air bag
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•
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Side air bag
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•
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Roof rail air bag
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•
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SDM
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•
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Seat belt retractor pretensioner wiring harness connector
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•
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Passenger instrument panel air bag wiring harness connector
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•
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Seat side air bag wiring harness connector
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•
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Roof rail air bag wiring harness connector
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SDM wiring harness connector
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Note
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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.
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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.
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1.
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Verify the scan tool Deployment Loop Resistance 1 and 2 parameters stay consistently between 2.1 and 4.0 Ω without any spikes or dropouts while moving the harness near each connector listed below:
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F105L Roof rail air bag - left
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F105R Roof rail air bag - right
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Inspect each connector terminal and harness for damage or corrosion and repair as necessary
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Apply Nyogel lubricant 760G to each connector terminal
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Insure each connector and CPA is correctly seated.
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2.
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Disconnect the scan tool.
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3.
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Disconnect the appropriate harness connector listed below:
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F105L Roof rail air bag - left
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F105R Roof rail air bag - right
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5.
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Test for greater than 25 Ω between the control circuit terminals 1 and 2.
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5.1.
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Disconnect the harness connector at the K36 SDM.
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5.2.
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Test for infinite resistance between the two control circuits.
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7.
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Test for less than 11 V between the control circuit terminals listed below and ground:
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Control circuit terminal 1
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Control circuit terminal 2
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7.2.
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Disconnect the harness connector at the K36 SDM.
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7.4.
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Test for less than 1 V between the control circuit and ground.
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9.
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Test for greater than 25 Ω between the control circuit terminals listed below and ground:
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Control circuit terminal 1
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Control circuit terminal 2
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9.1.
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Disconnect the harness connector at the K36 SDM.
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9.2.
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Test for infinite resistance between the control circuit and ground.
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11.
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Install a 3 A fused jumper wire between the appropriate control circuit terminals 1 and 2.
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13.
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Verify the scan tool Deployment Loop Resistance parameter is less than 2 Ω.
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13.2.
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Disconnect the harness connector at the K36 SDM.
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13.3.
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Test for less than 2 Ω in each control circuit end to end.
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14.
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Replace the appropriate F105L roof rail air bag - left or F015R roof rail air bag - right.
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Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
