B0019
DTC B0019 or B0020
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.
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptors
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
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
B0019 01 or B0020 01
The inflatable restraint module high and/or low circuit is short to voltage for 120 milliseconds.
B0019 02 or B0020 02
The inflatable restraint module high and/or low circuit is short to ground for 120 milliseconds.
B0019 04 or B0020 04
The inflatable restraint module high and/or low circuit is open for 120 milliseconds.
B0019 0D or B0020 0D
The inflatable restraint module deployment loop resistance is greater than 3.9 ohms for 120 milliseconds.
B0019 0E or B0020 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 commands the AIR BAG indicator ON.
* The SDM will store a DTC, however if an event occurs system will still attempt deployments.
Conditions for Clearing the DTC
* The DTC will be current for as long as the fault is present.
* When the fault is no longer present, the DTC will be a history DTC.
* A history DTC will clear after 50 ignition cycles.
Special Tools
J 38715-A Driver and Passenger SIR Load Tool
Circuit/System Testing
Important:
* Refer to SIR Service Precautions.
* When removing connectors, inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector:
- The front end sensor
- The SDM module
- The front end sensor wiring harness connector
- The SDM wiring harness connector
1. Ignition OFF, disconnect the harness connector at the I/P inflatable restraint module.
2. With the appropriate load tool adapter, connect J 38715-A in place of the I/P inflatable restraint module.
3. Ignition ON, with a scan tool, verify the appropriate DTC is set as current.
• If DTC is not set or is set as history, replace the I/P inflatable restraint module.
4. Ignition OFF, disconnect J 38715-A and the appropriate load tool adapter.
5. Disconnect the harness connector at the SDM.
6. Ignition ON, test for less than 1-volt between the appropriate high control circuit and ground listed below:
* I/P module Stage 1 terminal A
* I/P module Stage 2 terminal A
• If not within the specified range, test the circuit for a short to voltage.
7. Test for less than 1-volt between the appropriate low control circuit terminal and ground listed below:
* I/P module Stage 1 terminal B
* I/P module Stage 2 terminal B
• If not within the specified range, test the circuit for a short to voltage.
8. Ignition OFF, test for infinite resistance between the appropriate high control circuit terminal and ground listed below:
* I/P module Stage 1 terminal A
* I/P module Stage 2 terminal A
• If not within the specified range, test the circuit for a short to ground.
9. Test for infinite resistance between the applicable low control circuit terminal and ground listed below:
* I/P module Stage 1 terminal B
* I/P module Stage 2 terminal B
• If not within the specified range, test the circuit for a short to ground.
10. Test for less then 1 ohm between the following high control circuit terminals listed below:
* I/P module Stage 1 terminal A and SDM terminal 18
* I/P module Stage 2 terminal A and SDM terminal 13
• If not within the specified range, test the circuit for an open/high resistance.
11. Test for less then 1 ohm between the following low control circuit terminals listed below:
* I/P module Stage 1 terminal B and SDM terminal 19
* I/P module Stage 2 terminal B and SDM terminal 12
• If not within the specified range, test the circuit for an open/high resistance.
12. If all circuits test normal, replace the SDM.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests
* Inflatable Restraint Instrument Panel Module Replacement
* SIR/SRS Wiring Repairs