Part 4 of 5

Test J: DTC 19 Passenger Initiator Circuit Voltage High (Part 4 Of 5):

Supplemental Inflatable Restraint (SIR):

OPERATION:
During normal, non-deployment operation of the SIR system, a small amount of current flows through both the Driver and Passenger Deployment Loops. The Diagnostic Resistors within the Dual Pole Arming Sensor and the Discriminating Sensors along with the resistance of the Inflator Modules cause voltage drops within the Deployment Loops. The DERM monitors the voltage at "Passenger Side Low" terminal "B7" to detect shorts or opens within the Passenger Deployment Loop. When the measured voltage is above a specified percentage of "Passenger 36 VLR" for 500 milliseconds DTC 19 is set.

Test Conditions: Tested every 100 milliseconds during the "Continuous Monitoring" tests.

Failure Conditions: DTC 19 will set when the voltage measured at "Passenger Side Low" terminal "B7" is above a specified percentage of "Passenger 36 VLR" for 500 milliseconds and DTC 35 is not set.

Action Taken: DERM turns "ON" the "AIR BAG" warning lamp and sets a Diagnostic Trouble Code.

Conditions to Clear: DTC 19 will clear when the voltage measured at "Passenger Side Low" terminal "B7" is within a specified percentage of "Passenger 36 VLR" for 500 milliseconds.

POSSIBLE CAUSES:
Test Description: Number(S) below refer to circled number(S) on the diagnostic chart.
19. This test checks for decreased resistance in the passenger side diagnostic resistors of the dual pole arming sensor.
20. This test checks for a short from the high side of the passenger deployment loop to "Driver 36 VLR."
21. This test checks for a short from the high side of the passenger deployment loop to "Passenger 36 VLR."
22. This test checks for a short from the high side of the passenger deployment loop to "Driver Source Sense."
23. This test checks for a short from the high side of the passenger deployment loop to "Passenger Source Sense."
24. This test checks for a short from the low side of the passenger deployment loop to "Driver Source Sense."
25. This test checks for a short from the low side of the passenger deployment loop to "Passenger Source Sense."
26. This test checks for a short from the low side of the passenger deployment loop to "Driver 36 VLR."
27. This test checks for a short from the low side of the passenger deployment loop to "Passenger 36 VLR."

DIAGNOSTIC AIDS:
Refer to Diagnostic Aids for Test J (part 5 of 5). Part 5 of 5