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B0020




DTC B0014-B0045

Diagnostic Instructions

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

DTC Descriptors
DTC B0015 01
- LF Pretensioner Deployment Loop Short to Battery

DTC B0015 02
- LF Pretensioner Deployment Loop Short to Ground

DTC B0015 04
- LF Pretensioner Deployment Loop Open Circuit

DTC B0015 0D
- LF Pretensioner Deployment Loop Resistance Above Threshold

DTC B0015 0E
- LF Pretensioner Deployment Loop Resistance Below Threshold

DTC B0016 01
- Left Roof Rail Deployment Loop Stage 1 Short to Battery

DTC B0016 02
- Left Roof Rail Deployment Loop Stage 1 Short to Ground

DTC B0016 04
- Left Roof Rail Deployment Loop Stage 1 Open Circuit

DTC B0016 0D
- Left Roof Rail Deployment Loop Stage 1 Resistance Above Threshold

DTC B0016 0E
- Left Roof Rail Deployment Loop Stage 1 Resistance Below Threshold

DTC B0019 01
- Passenger Frontal Deployment Loop Stage 1 Short to Battery

DTC B0019 02
- Passenger Frontal Deployment Loop Stage 1 Short to Ground

DTC B0019 04
- Passenger Frontal Deployment Loop Stage 1 Open Circuit

DTC B0019 0D
- Passenger Frontal Deployment Loop Stage 1 Resistance Above Threshold

DTC B0019 0E
- Passenger Frontal Deployment Loop Stage 1 Resistance Below Threshold

DTC B0020 01
- Passenger Frontal Deployment Loop Stage 2 Short to Battery

DTC B0020 02
- Passenger Frontal Deployment Loop Stage 2 Short to Ground

DTC B0020 04
- Passenger Frontal Deployment Loop Stage 2 Open Circuit

DTC B0020 0D
- Passenger Frontal Deployment Loop Stage 2 Resistance Above Threshold

DTC B0020 0E
- Passenger Frontal Deployment Loop Stage 2 Resistance Below Threshold

DTC B0022 01
- RF Pretensioner Deployment Loop Short to Battery

DTC B0022 02
- RF Pretensioner Deployment Loop Short to Ground

DTC B0022 04
- RF Pretensioner Deployment Loop Open Circuit

DTC B0022 0D
- RF Pretensioner Deployment Loop Resistance Above Threshold

DTC B0022 0E
- RF Pretensioner Deployment Loop Resistance Below Threshold

DTC B0023 01
- Right Roof Rail Deployment Loop Stage 1 Short to Battery

DTC B0023 02
- Right Roof Rail Deployment Loop Stage 1 Short to Ground

DTC B0023 04
- Right Roof Rail Deployment Loop Stage 1 Open Circuit

DTC B0023 0D
- Right Roof Rail Deployment Loop Stage 1 Resistance Above Threshold

DTC B0023 0E
- Right Roof Rail Deployment Loop Stage 1 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 an inflatable restraint module. There are 2 shorting bars used within the module connector which will short together both high and low circuits, when the connector is disconnected. This will help to prevent unwanted deployment of the inflator module during servicing.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

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

The inflatable restraint module high and/or low circuit is short to voltage for 120 milliseconds.

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

The inflatable restraint module high and/or low circuit is short to ground for 120 milliseconds.

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

The inflatable restraint module high and/or low circuit is open for 120 milliseconds.

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

The inflatable restraint module deployment loop resistance is greater than 3.9 ohms for 120 milliseconds.

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

The inflatable restraint module deployment loop resistance is less than 1.1 ohms for 120 milliseconds.

Action Taken When the DTC Sets

* The SDM requests the instrument panel cluster (IPC) 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.

Reference Information
Schematic Reference

SIR Schematics ([1][2]Air Bag Systems)
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)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information
Special Tools

Each inflatable restraint module requires a specific adapter to connect the load tool to the SIR system.

J 38715-A Driver and Passenger SIR Load Tool

Circuit/System Testing

Important: Refer to SIR Service Precautions (Technician Safety Information).

When removing the connectors inspect for damage or corrosion. Damage or corrosion to the following requires repair or replacement of the affected component/connector:

* Pretensioner
* Inflatable restraint module
* SDM module
* Inflatable restraint module wiring harness connector
* SDM 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.

1. Verify that the appropriate inflator restraint module connector and CPA are engaged.

• If the above condition is not found, make the appropriate repair.

2. Ignition OFF, disconnect the harness connector at the appropriate inflatable restraint module.
3. With the appropriate load tool adaptor, connect special tool J 38715-A in place of the inflator restraint module.
4. Ignition ON, with a scan tool, verify the appropriate DTC is set as current.

• If the DTC is not set or is set as history, cycle ignition OFF, disconnect the adapter and J 38715-A , reconnect the harness connector at the inflator restraint module, and cycle the ignition ON. If the DTC resets after reconnecting the module, replace the inflator restraint module.

5. Ignition OFF, disconnect special tool J 38715-A and the adaptor.
6. Disconnect the harness connector at the SDM.
7. Ignition ON, test for less than 1 volt between the appropriate high control circuit listed below and ground:

* I/P module Stage 1 terminal 18
* I/P module Stage 2 terminal 13
* Left roof rail module terminal 9
* Right roof rail module terminal 10
* Left seatbelt pretensioner terminal 56
* Right seatbelt pretensioner terminal 52

• If greater than the specified value, test the high control circuit for a short to voltage.

8. Test for less than 1 volt between the appropriate low control circuit terminal listed below and ground:

* I/P module Stage 1 terminal 19
* I/P module Stage 2 terminal 12
* Left roof rail module terminal 8
* Right roof rail module terminal 11
* Left seatbelt pretensioner terminal 57
* Right seatbelt pretensioner terminal 53

• If greater than the specified value, test the low control circuit for a short to voltage.

9. Ignition OFF, test for infinite resistance between the appropriate high control circuit terminal listed below and ground:

* I/P module Stage 1 terminal 18
* I/P module Stage 2 terminal 13
* Left roof rail module terminal 9
* Right roof rail module terminal 10
* Left seatbelt pretensioner terminal 56
* Right seatbelt pretensioner terminal 52

• If not the specified value, test the high control circuit for a short to ground.

10. Test for infinite resistance between the appropriate low control circuit terminal listed below and ground:

* I/P module Stage 1 terminal 19
* I/P module Stage 2 terminal 12
* Left roof rail module terminal 8
* Right roof rail module terminal 11
* Left seatbelt pretensioner terminal 57
* Right seatbelt pretensioner terminal 53

• If not the specified value, test the low control circuit for a short to ground.

11. Test for less than 1 ohm between the following high control circuit terminals listed below:

* I/P module Stage 1 terminal A X1 and SDM terminal 18
* I/P module Stage 2 terminal B X2 and SDM terminal 13
* Left roof rail module terminal A and SDM terminal 9
* Right roof rail module terminal A and SDM terminal 10
* Left seatbelt pretensioner terminal 2 and SDM terminal 56
* Right seatbelt pretensioner terminal 2 and SDM terminal 52

• If greater than the specified range, test the high control circuit for an open/high resistance.

12. Test for less than 1 ohm between the following low control circuit terminals listed below:

* I/P module Stage 1 terminal B X1 and SDM terminal 19
* I/P module Stage 2 terminal A X2 and SDM terminal 12
* Left roof rail module terminal B and SDM terminal 8
* Right roof rail module terminal B and SDM terminal 11
* Left seatbelt pretensioner terminal 1 and SDM terminal 57
* Right seatbelt pretensioner terminal 1 and SDM terminal 53

• If greater than the specified range, test the low control circuit for an open/high resistance.

13. If all circuits test normal, replace the SDM.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Instrument Panel Inflatable Restraint Module Replacement (Service and Repair)
* Inflatable Restraint Roof Side Rail Module Replacement - Front (Service and Repair)
* Seat Belt Retractor Pretensioner Replacement - Front (Removal and Replacement)
* SIR/SRS Wiring Repairs (Component Tests and General Diagnostics)
* Control Module References (Programming and Relearning) for SDM replacement, setup, and programming

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