Part 5 of 5

Test J: DTC 19 Passenger Initiator Circuit Voltage High (Part 5 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 "INFLATABLE RESTRAINT" 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.
28. This test determines whether malfunction is an open in the forward discriminating sensor.
29. This test checks for an open In CKT 1404B.
30. This test determines whether the malfunction is an open in the RH mid-rail discriminating sensor.
31. This test checks for an open in CKT 348E.

DIAGNOSTIC AIDS:
An intermittent condition is likely to be caused by backed out/shorted terminals on the arming sensor harness connector, poor connection at any of the discriminating sensor terminals, a short from CKT 236 or CKT 1401 to CKTs 347, 348, 1403 or 1404, a short from CKT 1400 or CKT 1837 to CKT 347 or CKT 1403, or an open or high resistance in CKTs 1404B, 348E or 1751.