DTC B14DC

Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Review Strategy Based Diagnosis for an overview of the diagnostic approach. Diagnostic Procedure Instructions provides an overview of each diagnostic category. DTC Descriptors DTC B14DC 11 Driver Inboard Seat Side Air Bag High Control Short to Ground DTC B14DC 12 Driver Inboard Seat Side Air Bag High Control Short to Battery DTC B14DC 13 Driver Inboard Seat Side Air Bag High Control Open DTC B14DC 1A Driver Inboard Seat Side Air Bag High Control Low Resistance DTC B14DC 1B Driver Inboard Seat Side Air Bag High Control High Resistance Diagnostic Fault Information

Circuit	Circuit Functio	Short to n Ground	Low Resista	High nce Resista	ncOepen	Short to Voltage	Signal Performa
4207	Control	B14DC 11	B14DC 1A	B14DC 1B	B14DC 13, B14DC 1B	B14DC 12	—
4208	Control	B14DC 11	B14DC 1A	B14DC 1B	B14DC 13, B14DC 1B	B14DC 12	—

Circuit/System Description The F106DA Front Seat Inboard Seat Back Airbag — Driver is a single stage inflator located inside the driver seat on the inboard side. The F106DA Front Seat Inboard Seat Back Airbag — Driver contains a housing, inflatable Airbag, an initiating device, a canister of gas generating material and, in some cases, stored compressed gas. During a side or frontal crash of sufficient force, the Restraints Control Module (RCM) will allow current to flow through the deployment loop in order to deploy an Airbag. The F106DA Front Seat Inboard Seat Back Airbag — Driver has a high control circuit that will supply voltage to deploy the Airbag and a low control circuit that will supply ground to deploy the Airbag. Circuit 4207 is used as the high control while circuit 4208 is used as the low control. Conditions for Running the DTC Ignition voltage is between 9–16 V. Conditions for Setting the DTC B14DC 11 The Airbag control circuit is shorted to ground for 2 seconds. B14DC 12 The Airbag control circuit is shorted to voltage for 2 seconds. B14DC 13 The Airbag control circuit is open for 2 seconds. B14DC 1A The Airbag deployment loop resistance is less than 1.4 Ω for 2 seconds. B14DC 1B The Airbag deployment loop resistance is greater than 4.2 Ω for 2 seconds. Action Taken When the DTC Sets The Restraints Control Module requests the instrument cluster to illuminate the Airbag indicator. The Restraints Control Module 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. Refer to SIR Disabling and Enabling. Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and the connectors may result in a misdiagnosis, causing a part replacement with a reappearance of the malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections. An 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 1B is set. Reference Information Schematic Reference SIR Schematics Connector End View Reference Component Connector End Views Description and Operation Supplemental Inflatable Restraint System Description and Operation Electrical Information Reference Circuit Testing Testing for Intermittent Conditions and Poor Connections Wiring Repairs Connector Repairs Scan Tool Reference Control Module References for scan tool information Special Tools EL-38025-580 Terminal Release Tool Kit Circuit/System Verification

Note

The condition may be intermittent and require driving the vehicle, then reviewing the snapshot to verify resistance parameters do not drop out or spike. Refer to Testing for Intermittent Conditions and Poor Connections

Note

For connector location and identification refer to Master Electrical Component List.

1. Verify the appropriate scan tool Deployment Loop Resistance parameters stay consistently between 2.1 and 4.0 Ω for the F106DA Front Seat Inboard Seat Back Airbag — Driver. ⇒ If less than 2.1 Ω or greater than 4.0 Ω Refer to Circuit/System Testing. ⇓ If between 2.1–4.0 Ω without any spikes or dropouts
2. A fault is not currently present and may be an intermittent condition. Circuit/System Testing

Note

Refer to SIR Service Precautions. Refer to SIR Disabling and Enabling. 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 Airbag Restraints Control Module All wiring harness connectors Restraints Control Module wiring harness connector 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.

1. Ignition OFF.
2. Verify the SIR system is disabled.
3. Disconnect the appropriate connector at the F106DA Front Seat Inboard Seat Back Airbag — Driver: DTC B14DC = X2
4. Test for greater than 25 Ω between control circuit terminal 1 and control circuit terminal 2. ⇒ If 25 Ω or less 4.1. Verify the appropriate circuits are not shorted together: DTC B14DC = Circuit 4207 and circuit 4208 ⇒ If a short between the circuit is found, repair the fault on the circuit. ⇓ If a short between the circuits is not found 4.2. Replace the K36 Restraints Control Module. ⇓ If greater than 25 Ω
5. Ignition ON.
6. Verify the SIR system is disabled.
7. Test for less than 11 V between the control circuit terminals listed below and ground: Control circuit terminal 1 Control circuit terminal 2 ⇒ If 11 V or greater 7.1. Test the following circuits for a short to voltage: DTC B14DC = Circuit 4207 and circuit 4208 ⇒ If a short to voltage is found, repair the fault on the circuit. ⇓ If a short to voltage is not found 7.2. Replace the K36 Restraints Control Module. ⇓ If less than 11 V
8. Ignition OFF.
9. Verify the SIR system is disabled.
10. Test for greater than 25 Ω between the control circuit terminals listed below and ground: Control circuit terminal 1 Control circuit terminal 2 ⇒ If 25 Ω or less 10.1. Test the following circuits for a short to ground: DTC B14DC = Circuit 4207 and circuit 4208 ⇒ If a short to ground is found, repair the fault on the circuit. ⇓ If a short to ground is not found 10.2. Replace the K36 Restraints Control Module. ⇓ If greater than 25 Ω
11. Ignition OFF.
12. Verify the SIR system is disabled.
13. Install a 3 A fused jumper wire between control circuit terminal 1 and control circuit terminal 2, ignition ON.
14. Verify the scan tool Deployment Loop Resistance parameter is less than 2 Ω. ⇒ If 2 Ω or greater 14.1. Verify the SIR system is disabled. 14.2. Test the following circuits for an open/high resistance: DTC B14DC = Circuit 4207 and circuit 4208 ⇒ If an open/high resistance is found, repair the fault on the circuit. ⇓ If an open/high resistance is not found 14.3. Replace the K36 Restraints Control Module. ⇓ If less than 2 Ω
15. Ignition OFF, connect the harness connector at the F106DA Front Seat Inboard Seat Back Airbag — Driver and press in the CPA (if equipped) until an audible and/or tactile click is heard.
16. Ignition ON, clear DTCs. Operate the vehicle within the Conditions for Running the DTC.
17. Verify DTC B14DC is not set. ⇒ If DTC B14DC is set Replace the F106DA Front Seat Inboard Seat Back Airbag — Driver. ⇓ If DTC B14DC is not set
18. A fault is not currently present and may be an intermittent condition. Repair Instructions Perform the Diagnostic Repair Verification after completing the repair. Front Seat Inboard Seat Back Airbag Replacement Control Module References for Restraints Control Module replacement, programming, and setup