B0019
DTC B0019
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
IMPORTANT: Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Testing and Inspection
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 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
- The SDM commands the AIR BAG indicator ON via serial data communications.
- The SIR System is disabled and no deployments are allowed.
CONDITIONS FOR CLEARING THE DTC
- The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.
- A history DTC will clear once 255 malfunction-free ignition cycles have occurred.
CIRCUIT/SYSTEM TESTING
1. Ignition OFF, remove the left I/P lower trim cover and disconnect the I/P module in-line connector.
IMPORTANT: When removing connectors, inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector:
- The I/P module
- The SDM module
- The I/P module wiring harness connector
- The SDM wiring harness connector
2. Use the J 38715-80 adapter to connect the J 38715-A to the harness side of the I/P module in-line wiring harness connector. Use the PASSENGER INFLATOR and BASE of COLUMN connectors located on the load tool.
3. Ignition ON, use a scan tool to observe the SIR DTC display. Verify DTC B0019 or B0020 are set current.
- If DTC B0019 or B0020 is history, replace the I/P module.
4. Ignition OFF, disconnect and remove the J 38715-A and adapter. Then remove the SDM connector.
5. Test the high and low circuits between the SDM and I/P module for a short to voltage, short to ground, or open/low resistance. Verify that a short to voltage, short to ground, or open/low resistance does not exist.
- If any of the above conditions are found, make the appropriate repair.
6. If all circuits test normal, replace the SDM.
REPAIR INSTRUCTIONS
IMPORTANT: Always perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests
- Inflatable Restraint Instrument Panel Module Replacement
- Control Module References for SDM replacement, setup, and programming.