B1019

Circuit Description
When you first turn the ignition switch to the RUN position, the Inflatable Restraint Sensing and Diagnostic Module (SDM) performs tests in order to diagnose critical malfunctions within the SDM. Upon passing these tests the following circuits are measured in order to ensure that they are within their respective normal voltage ranges:
^ IGNITION 1
^ 23 VLR
^ Deployment loop voltages
The SDM monitors the voltages at DRIVER SIDE LOW terminal 3 and PASSENGER SIDE LOW terminal 4 to detect shorts to B+ in the inflator module circuits.

Conditions for Setting the DTC
^ The voltage at DRIVER SIDE LOW terminal 3 is less than 4.8 volts.
^ The voltage at PASSENGER SIDE LOW terminal 4 is more than 4.8 volts for 500 milliseconds.
The CONTINUOUS MONITORING test inspects for this DTC. This test occurs when IGNITION 1 is within the normal operating voltage range.

Action Taken When the DTC Sets
^ The SDM sets a diagnostic trouble code.
^ The SDM turns the AIR BAG warning lamp to the ON position.

Conditions for Clearing the DTC
^ Current DTC-The voltage at PASSENGER SIDE LOW terminal 4 is less than 4.8 volts for 500 milliseconds.
^ History DTC
- You issue a scan tool CLEAR CODES command.
- After 250 malfunction free ignition cycles have occurred.

Diagnostic Aids
A short to B+ in the Inflatable Restraint Instrument Panel (IP) Module circuit can cause an intermittent condition. Inspect circuit 1403 and circuit 1404 carefully for cutting or chafing. Wiring pigtail damage requires replacement of the Inflatable Restraint IP Module. The diagnostic table directs the technician to note the entry value of PASSENGER SENSELO. Comparing the value of PASSENGER SENSELO can be helpful in determining if an intermittent condition exists.
When measurements are requested in this table, use the J 39200 DMM with the correct terminal adapter from the J 35616-A Connector Test Adapter kit.

Test Description
The numbers below refer to the step numbers on the diagnostic table:
2. This test determines the passenger side low voltage which is measured by the Inflatable Restraint Sensing and Diagnostic Module (SDM).
3. This test isolates the malfunction to one side of the Inflatable Restraint IP Module yellow 2-way connector.
5. This test determines whether the malfunction is in circuit 1403.
7. This test determines whether the malfunction is in circuit 1404.