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B0020





DTC B0014 - B0045

Diagnostic Instructions

- Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure Initial Inspection and Diagnostic Overview.
- Review Strategy Based Diagnosis for an overview of the diagnostic approach Initial Inspection and Diagnostic Overview.
- Diagnostic Procedure Instructions provides an overview of each diagnostic category Initial Inspection and Diagnostic Overview.

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 Circuit
DTC B0014 0D: Driver Seat Side Air Bag Deployment Loop Resistance Above Threshold
DTC B0014 0E: Driver Seat Side Air Bag Deployment Loop Resistance Below Threshold
DTC B0015 01: Driver Seat Belt Retractor Pretensioner Deployment Loop Short to Battery
DTC B0015 02: Driver Seat Belt Retractor Pretensioner Deployment Loop Short to Ground
DTC B0015 04: Driver Seat Belt Retractor Pretensioner Deployment Loop Open Circuit
DTC B0015 0D: Driver Seat Belt Retractor Pretensioner Deployment Loop Resistance Above Threshold
DTC B0015 0E: Driver Seat Belt Retractor Pretensioner Deployment Loop Resistance Below Threshold
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 Circuit
DTC B0016 0D: Left Roof Rail Air Bag Deployment Loop Resistance Above Threshold
DTC B0016 0E: Left Roof Rail Air Bag Deployment Loop Resistance Below Threshold
DTC B0019 01: Passenger Instrument Panel Air Bag Deployment Loop Stage 1 Short to Battery
DTC B0019 02: Passenger Instrument Panel Air Bag Deployment Loop Stage 1 Short to Ground
DTC B0019 04: Passenger Instrument Panel Air Bag Deployment Loop Stage 1 Open Circuit
DTC B0019 0D: Passenger Instrument Panel Air Bag Deployment Loop Stage 1 Resistance Above Threshold
DTC B0019 0E: Passenger Instrument Panel Air Bag Deployment Loop Stage 1 Resistance Below Threshold
DTC B0020 01: Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Short to Battery
DTC B0020 02: Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Short to Ground
DTC B0020 04: Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Open Circuit
DTC B0020 0D: Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Resistance Above Threshold
DTC B0020 0E: Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Resistance Below Threshold
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 Circuit
DTC B0021 0D: Passenger Seat Side Air Bag Deployment Loop Resistance Above Threshold
DTC B0021 0E: Passenger Seat Side Air Bag Deployment Loop Resistance Below Threshold
DTC B0022 01: Passenger Seat Belt Retractor Pretensioner Deployment Loop Short to Battery
DTC B0022 02: Passenger Seat Belt Retractor Pretensioner Deployment Loop Short to Ground
DTC B0022 04: Passenger Seat Belt Retractor Pretensioner Deployment Loop Open Circuit
DTC B0022 0D: Passenger Seat Belt Retractor Pretensioner Deployment Loop Resistance Above Threshold
DTC B0022 0E: Passenger Seat Belt Retractor Pretensioner Deployment Loop Resistance Below Threshold
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 Circuit
DTC B0023 0D: Right Roof Rail Air Bag Deployment Loop Resistance Above Threshold
DTC B0023 0E: Right Roof Rail Air Bag Deployment Loop Resistance Below Threshold

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 air bag. A shorting bar (if equipped) is located in the connector.

Conditions for Running the DTC

Ignition voltage is between 9-16V.

Conditions for Setting the DTC

B0014 01, B0015 01, B0016 01, B0019 01, B0020 01, B0021 01, B0022 01, B0023 01

The air bag or pretensioner high and/or low circuit is shorted to voltage for 120 milliseconds.

B0014 02, B0015 02, B0016 02, B0019 02, B0020 02, B0021 02, B0022 02, B0023 02

The air bag or pretensioner high and/or low circuit is shorted to ground for 120 milliseconds.

B0014 04, B0015 04, B0016 04, B0019 04, B0020 04, B0021 04, B0022 04, B0023 04

The air bag or pretensioner high and/or low circuit is open for 120 milliseconds.

B0014 0D, B0015 0D, B0016 0D, B0019 0D, B0020 0D, B0021 0D, B0022 0D, B0023 0D

The air bag or pretensioner deployment loop resistance is greater than 3.9 ohms for 120 milliseconds.

B0014 0E, B0015 0E, B0016 0E, B0019 0E, B0020 0E, B0021 0E, B0022 0E, B0023 0E

The air bag or pretensioner deployment loop resistance is less than 1.1 ohms for 120 milliseconds.

Action Taken When the DTC Sets

- The inflatable restraint sensing and diagnostic module requests the instrument cluster to illuminate the SIR system AIR BAG indicator.
- The inflatable restraint sensing and diagnostic 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 fault-free ignition cycles have occurred.

Diagnostic Aid

Note: The following diagnostic aids apply for both current and history DTCs.

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:

- Passenger instrument panel air bag
- Driver and passenger seat side air bags
- Left and right roof rail air bags
- Left and right pretensioners
- Inline connectors - on the side of the harness connector
- Harness side of the inflatable restraint sensing and diagnostic module 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. If DTCs of deployment loops which are in the seat DTC B0014 and B0021, 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.

Reference Information

Schematic Reference

SIR Schematics Electrical Diagrams

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 Component Tests and General Diagnostics
- Connector Repairs Component Tests and General Diagnostics
- Testing for Intermittent Conditions and Poor Connections Component Tests and General Diagnostics
- Wiring Repairs Component Tests and General Diagnostics

Scan Tool Reference

Control Module References for scan tool information Programming and Relearning

Special Tools

EL-38125-580 Terminal Release Tool Kit

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 pretensioner
- Passenger instrument panel air bag
- Side air bag
- Roof rail air bag
- Inflatable restraint sensing and diagnostic module
- Seat belt pretensioner wiring harness connector
- Passenger instrument panel air bag wiring harness connector
- Seat side air bag wiring harness connector
- Roof rail air bag wiring harness connector
- Inflatable restraint sensing and diagnostic 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. 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 scan tool Deployment Loop Resistance 1 and 2 parameters stay consistently between 2.1 and 4.0 ohms without any spikes or dropouts while moving the harness near each connector listed below:
- Passenger instrument panel air bag
- Roof rail air bag - left
- Roof rail air bag - right
- Side air bag
- Seat belt retractor pretensioner
- Any inline harness
- Inflatable restraint sensing and diagnostic module
-> If less than 2.1 or greater than 4.0 ohms

Refer to Circuit/System Testing Component Tests and General Diagnostics.

-> If there are spikes or dropouts, perform the following

- Inspect each connector terminal and harness for damage or corrosion and repair as necessary
- Insure each connector and CPA is correctly seated.

-> If within 2.1 and 4.0 ohms without any spikes or dropouts

2. All OK

Circuit/System Testing

DTC B0014-B0018 or B0021-B0045

1. Ignition OFF.
2. Disconnect the scan tool.
3. Disconnect the appropriate harness connector listed below:
- Roof rail air bag - left
- Roof rail air bag - right
- Side air bag
- Seat belt retractor pretensioner
4. Wait for 120 seconds.
5. Test for greater than 25 ohms between the control circuit terminals A (Regular cab) or 1 (Extended and Crew Cab) and B (Regular cab) or 2 (Extended and Crew Cab).
-> If 25 ohms or less

5.1 Disconnect the harness connector at the inflatable restraint sensing and diagnostic module.

Note: Some connectors may be equipped with shorting bars as a safety component to prevent accidental inflator deployment. When testing on a connector with shorting bars, the shorting bars must be disabled to ensure accurate test results. Insert an appropriate pick from EL-38125-580 and depress the shorting bars above the appropriate terminals. This will lift the shorting bar from the terminal and allow accurate test results. Take care not to damage the connector, shorting bar, or terminal when depressing the shorting bar.

5.2 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 inflatable restraint sensing and diagnostic module.

-> If greater than 25 ohms

6. Ignition ON.
7. Test for less than 11 V between the appropriate control circuit terminals listed below and ground:
- Roof rail module high control circuit terminal 1
- Roof rail module high control circuit terminal 2
- Seat side air bag control circuit terminal 1
- Seat side air bag control circuit terminal 2
- Seat belt retractor pretensioner control circuit terminal 1
- Seat belt retractor pretensioner control circuit terminal 2

-> If 11 V or greater

7.1 Ignition OFF.
7.2 Disconnect the harness connector at the K36 inflatable restraint sensing and diagnostic module.
7.3 Ignition ON.
7.4 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

8. Ignition OFF.
9. Test for greater than 25 ohms between the appropriate control circuit terminals listed below and ground:
- Roof rail module high control circuit terminal 1
- Roof rail module high control circuit terminal 2
- Seat side air bag control circuit terminal 1
- Seat side air bag control circuit terminal 2
- Seat belt retractor pretensioner control circuit terminal 1
- Seat belt retractor pretensioner control circuit terminal 2

-> If 25 ohms or less

9.1 Disconnect the harness connector at the inflatable restraint sensing and diagnostic module.
9.2 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 inflatable restraint sensing and diagnostic module.

-> If greater than 25 ohms

10. Ignition OFF.
11. Install a 3 A fused jumper wire between the control circuit terminals A (Regular cab) or 1 (Extended and Crew Cab) and B (Regular cab) or 2 (Extended and Crew Cab).
12. Ignition ON.
13. Verify the scan tool Deployment Loop Resistance parameter is less than 2 ohms.

-> If 2 ohms or greater

13.1 Ignition OFF.
13.2 Disconnect the harness connector at the K36 inflatable restraint sensing and diagnostic module.
13.3 Test for less than 2 ohms in each control circuit end to end.
-> If 2 ohms or greater, repair the open/high resistance in the circuit.
-> If less than 2 ohms, replace the K36 inflatable restraint sensing and diagnostic module.

-> If less than 2 ohms

14. Ignition OFF, connect the harness connector at the roof rail air bag - left, roof rail air bag - right, side air bag or seat belt retractor pretensioner, press in the CPA (if equipped) until an audible and/or tactile click is heard.
15. Ignition ON, clear DTCs. Operate the vehicle within the Conditions for Running the DTC.
16. Verify DTC B0014-B0018 or B0021-B0045 is not set.

-> If DTC B0014-B0018 or B0021-B0045 is set

Replace the roof rail air bag - left, roof rail air bag - right, side air bag or seat belt retractor pretensioner.

-> If DTC B0014-B0018 or B0021-B0045 is not set

17. All OK.

DTC B0019-B0020

1. Ignition OFF.
2. Disconnect the scan tool.
3. Disconnect the harness connector X200.
4. Test for greater than 25 ohms between the inflatable restraint I/P module stage 1 control circuit terminals X200 terminal A1 and A2.

-> If 25 ohms or less

4.1 Disconnect the harness connector at the inflatable restraint sensing and diagnostic module.

Note: Some connectors may be equipped with shorting bars as a safety component to prevent accidental inflator deployment. When testing on a connector with shorting bars, the shorting bars must be disabled to ensure accurate test results. Insert an appropriate pick from EL-38125-580 and depress the shorting bars above the appropriate terminals. This will lift the shorting bar from the terminal and allow accurate test results. Take care not to damage the connector, shorting bar, or terminal when depressing the shorting bar.

4.2 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 inflatable restraint sensing and diagnostic module.

-> If greater than 25 ohms

5. Test for greater than 25 ohms between the inflatable restraint I/P module stage 2 control circuit terminals X200 terminal B1 and B2.
-> If 25 ohms or less

5.1 Disconnect the harness connector at the inflatable restraint sensing and diagnostic module.

Note: Some connectors may be equipped with shorting bars as a safety component to prevent accidental inflator deployment. When testing on a connector with shorting bars, the shorting bars must be disabled to ensure accurate test results. Insert an appropriate pick from EL-38125-580 and depress the shorting bars above the appropriate terminals. This will lift the shorting bar from the terminal and allow accurate test results. Take care not to damage the connector, shorting bar, or terminal when depressing the shorting bar.

5.2 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 inflatable restraint sensing and diagnostic module.

-> If greater than 25 ohms

6. Ignition ON.
7. Test for less than 11 V between the control circuit terminals listed below and ground:
- X200 control circuit terminal A1
- X200 control circuit terminal A2
- X200 control circuit terminal B1
- X200 control circuit terminal B2

-> If 11 V or greater

7.1 Ignition OFF.
7.2 Disconnect the harness connector at the inflatable restraint sensing and diagnostic module.
7.3 Ignition ON.
7.4 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 inflatable restraint sensing and diagnostic module.

-> If less than 11 V

8. Test for greater than 25 ohms between the control circuit terminals listed below and ground:
- X200 control circuit terminal A1
- X200 control circuit terminal A2
- X200 control circuit terminal B1
- X200 control circuit terminal B2

-> If 25 ohms or less

8.1 Disconnect the harness connector at the inflatable restraint sensing and diagnostic module.
8.2 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 inflatable restraint sensing and diagnostic module.

-> If greater than 25 ohms

9. Ignition OFF.
10. Connect harness connector X200.
11. Disconnect the inflatable restraint I/P module connector.
12. Ignition ON.
13. Test for less than 11 V between the control circuit terminals listed below and ground:
- I/P module- stage 1- high control circuit terminal A1 (10 series without MEX) or A (without 10 series or with MEX) X1
- I/P module- stage 1- low control circuit terminal A2 (10 series without MEX) or B (without 10 series or with MEX) X1
- I/P module- stage 2- high control circuit terminal B1 X1
- I/P module- stage 2- low control circuit terminal B2 X1

-> If 11 V or greater

Repair the short to voltage on the circuit.

-> If less than 11 V

14. Ignition OFF.
15. Test for greater than 25 ohms between the control circuit terminals listed below and ground:
- I/P module- stage 1- high control circuit terminal A1 (10 series without MEX) or A (without 10 series or with MEX) X1
- I/P module- stage 1- low control circuit terminal A2 (10 series without MEX) or B (without 10 series or with MEX) X1
- I/P module- stage 2- high control circuit terminal B1 X1
- I/P module- stage 2- low control circuit terminal B2 X1

-> If 25 ohms or less

Repair the short to ground on the circuit.

-> If greater than 25 ohms

16. Ignition OFF.
17. Test for less than 5 ohms between the control circuit terminals listed below:
- X200 control circuit terminal A1 and I/P module- stage 1- high control circuit terminal A1 (10 series without MEX) or A (without 10 series or with MEX) X1
- X200 control circuit terminal A2 and I/P module- stage 1- low control circuit terminal A2 (10 series without MEX) or B (without 10 series or with MEX) X1
- X200 control circuit terminal B1 and I/P module- stage 2- high control circuit terminal B1 X1
- X200 control circuit terminal B2 and I/P module- stage 2- low control circuit terminal B2 X1

-> If greater than 5 ohms

Repair the open/high resistance in the circuit.

-> If 5 ohms or less

18. Ignition OFF, connect the harness connector at the inflatable restraint I/P module, press in the CPA (if equipped) until an audible and/or tactile click is heard.
19. Ignition ON, clear DTCs. Operate the vehicle within the Conditions for Running the DTC.
20. Verify DTC B0019 or B0020 is not set.

-> If DTC B0019 or B0020 is set

Replace the inflatable restraint I/P module.

-> If DTC B0019 or B0020 is not set

21. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

- SIR/SRS Wiring Repairs Electrical Diagrams
- Instrument Panel Inflatable Restraint Module Replacement Removal and Replacement
- Steering Wheel Inflatable Restraint Module Replacement Removal and Replacement
- Steering Wheel Airbag Coil Replacement Removal and Replacement
- Inflatable Restraint Side Impact Sensor Replacement Service and Repair
- Roof Side Rail Inflatable Restraint Module Replacement Service and Repair
- Seat Belt Retractor Pretensioner Replacement - Front Removal and Replacement
- Control Module References for SDM replacement, setup, and programming Programming and Relearning
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