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 08: Passenger Frontal Deployment Loop Stage 1 Signal Invalid

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 08: Passenger Frontal Deployment Loop Stage 2 Signal Invalid

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	High Resistance	Low Resistance	Short to Voltage	Signal Performance
I/P Module Stage 1 High Control	B0019 02	B0019 0D	B0019 0E	B0019 01	B0019 08
I/P Module Stage 1 Low Control	B0019 02	B0019 0D	B0019 0E	B0019 01	B0019 08
I/P Module Stage 2 High Control	B0020 02	B0020 0D	B0020 0E	B0020 01	B0020 08
I/P Module Stage 2 Low Control	B0020 02	B0020 0D	B0020 0E	B0020 01	B0020 08

Circuit/System Description

If a malfunction is detected, a DTC will be stored in non-volatile memory. 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 instrument panel (I/P) module. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage. There are 2 shorting bars used within the I/P module connector which will short together both I/P module stage 1 high and low circuits, and both I/P module stage 2 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 control circuit is shorted to voltage for 2 seconds.

B0019 02 Stage 1 or B0020 02 Stage 2

The I/P module high and/or low control circuit is shorted to ground for 2 seconds.

B0019 08 Stage 1 or B0020 04 Stage 2

The I/P module high and/or low control circuit is invalid during SDM initialization.

B0019 0D Stage 1 or B0020 0D Stage 2

The I/P module deployment loop resistance is more than 5.5 ohms for 2 seconds.

B0019 0E Stage 1 or B0020 0E Stage 2

The I/P module deployment loop resistance is less than 1.1 ohms for 2 seconds.

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

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

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.

•	I/P module

•	SDM module

•	I/P module 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 shorting-bars within the connector allowing the deployment circuit to operate properly.

1. Ignition OFF, disconnect the appropriate harness connector at the inflatable restraint I/P module.
2. Ignition ON, verify that the appropriate scan tool Passenger Airbag Stage 1 or Stage 2 Squib Circuit Resistance parameter is greater than 5.4 ohms at the control circuits.

⇒	If less than the specified range, test the control circuits for a short to ground. If the circuits test normal, replace the SDM.

3. Connect a fused jumper wire between the appropriate control circuit terminals listed below:

•	I/P module stage 1 terminal 1 X1 and terminal 2 X1

•	I/P module stage 2 terminal 1 X2 and terminal 2 X2

4. Ignition ON, verify that the appropriate scan tool Passenger Airbag Stage 1 or Stage 2 Squib Circuit Resistance parameter is less than 1.2 ohms at the control circuits.

⇒	If greater than the specified range, test the control circuits for a short to voltage or an open/high resistance. If the circuits test normal, replace the SDM.

5. If all circuits test normal, replace the inflatable restraint I/P module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.