Diagnostic Instructions

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	Short to Ground	Low Resistance	High Resistance	Open	Short to Voltage
I/P Module Stage 1 High Control	B0019 02	B0019 0D	B0019 04	B0019 01	B0019 0E
I/P Module Stage 1 Low Control	B0019 02	B0019 0D	B0019 04	B0019 01	B0019 0E
I/P Module Stage 2 High Control	B0020 02	B0020 0D	B0020 04	B0020 01	B0020 0E
I/P Module Stage 2 Low Control	B0020 02	B0020 0D	B0020 04	B0020 01	B0020 0E

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 Stage 1 or B0020 01 Stage 2

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

B0019 02 Stage 1 or B0020 02 Stage 2

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

B0019 04 Stage 1 or B0020 04 Stage 2

The I/P module high and/or low circuit is open for 120 milliseconds.

B0019 0D Stage 1 or B0020 0D Stage 2

The I/P module deployment loop resistance is more than 5.1 ohms for 120 milliseconds.

B0019 0E Stage 1 or B0020 0E Stage 2

The I/P module deployment loop resistance is less than 1.3 ohms for 120 milliseconds.

Action Taken When the DTC Sets

Conditions for Clearing the DTC

Reference Information

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

Special Tools

Circuit/System Testing

Important: Refer to SIR Service Precautions .

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

•	Inflatable restraint module

•	SDM module

•	Front end sensor wiring harness connector

•	SDM wiring harness connector

Important: 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 shoring-bars within the connector allowing the deployment circuit to operate properly.

1. Verify that the I/P inflatable 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 I/P inflatable restraint module.
3. With the appropriate load tool adapter, connect J 38715-A in place of the I/P inflatable 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 the ignition OFF, disconnect the load tool and adapter, reconnect the harness connector at the I/P inflatable restraint module, and cycle the ignition ON. If the DTC resets after reconnecting the module, replace the I/P inflatable restraint module.

5. Ignition OFF, disconnect the load tool and the adapter.
6. Disconnect the harness connector at the SDM.
7. Ignition ON, test for less than 1.0 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

⇒	If not within the specified range, test the control circuit for a short to voltage.

8. Test for less than 1.0 volt 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

⇒	If not within the specified range, test the control circuit for a short to voltage.

9. Ignition OFF, 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

⇒	If not within the specified range, test the control circuit for a short to ground.

10. 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

⇒	If not within the specified range, test the control circuit for a short to ground.

11. Test for less then 1.0 ohm between the appropriate 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 control circuit for an open/high resistance.

12. Test for less then 1 ohm between the appropriate 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 control circuit for an open/high resistance.

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

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.