DTC 19

�pDiagnostic Chart:

�pDiagnostic Chart:

P�pDiagnostic Chart:

Wiring Diagram:

CIRCUIT DESCRIPTION
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 CONDITIONSs:
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.

TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.
1. DTC 19 and 24 together means that there is an open between the passenger inflator module harness connector and the forward lamp interconnect. This causes the voltage to increase at "Passenger Side Low" due to the loss of a ground path. This also causes the voltage to decrease at "Driver Side Low" due to decreased current flow through the discriminating sensor network.
2. This test checks for decreased resistance in the driver side diagnostic resistors of the dual pole arming sensor.
3. This test checks for decreased resistance in the passenger side diagnostic resistors of the dual pole arming sensor.
4. This test checks for a short from the high side of the driver deployment loop to "Driver 36 VLR."
5. This test determines whether the malfunction is an open in CKT 348E or a malfunctioning DERM.
6. This test checks for a short from the high side of the driver deployment loop to "Passenger 36 VLR."
7. This test checks for a short from the high side of the driver deployment loop to "Driver Source Sense."
8. This test checks for short from the high side of the driver deployment loop to "Passenger Source Sense."
9. This test checks for a short from the high side of the passenger deployment loop to "Driver 36 VLR.
10. This test checks for a short from the high side of the passenger deployment loop to "Passenger 36 VLR."
11. This test checks for a short from the high side of the passenger deployment loop to "Driver Source Sense."
12. This test checks for a short from the high side of the passenger deployment loop to Passenger Source Sense."
13. This test checks for a short from the low side of the driver deployment loop to "Driver 36 VLR."
14. This test checks for a short from the low side of the driver deployment loop to "Passenger 36 VLR."
15. This test checks for a short from the low side of the driver deployment loop to "Driver Source Sense."
16. This test checks for a short from the low side of the driver deployment loop to "Passenger Source Sense."
17. This test checks for increased resistance of the diagnostic resistor in the forward discriminating sensor
18. This test determines whether the malfunction is increased resistance of the diagnostic resistor in the passenger compartment discriminating sensor or a malfunctioning DERM.