Supplemental Inflatable Restraint (SIR)

Test T: DTC 34 Dual Pole Arming Sensor Ignition Feed Open:

Supplemental Inflatable Restraint (SIR):

OPERATION:
During the "Turn-ON" tests, performed at the beginning of each ignition cycle, the DERM delays the charging of the "Driver 36 VLR" and "Passenger 36 VLR" power supplies. While the delay is active, the DERM measures the voltage at the "Driver 36 VLR" terminal "A4", "Passenger 36 VLR" terminal "A3", "Driver Source Sense" terminal "A5", and "Passenger Source Sense" terminal "A6." When the voltage measured at the two "36 VLR" power supplies indicates they are in a discharged state and the voltage measured at each "Source Sense" terminal is a specified amount below "Ignition 1" voltage DTC 34 is set.

Test Conditions: Tested once each ignition cycle during the "Turn-ON" tests while the "36 VLR Delay" is active.

Failure Conditions: DTC 34 will set when, with both "36 VLR" power supplies in a discharged state, the voltage measured at "Driver Source Sense" terminal "A5" and "Passenger Source Sense" terminal "A6" are simultaneously a specified amount below "Ignition 1" voltage and no "higher priority faults" are detected.

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

Conditions to Clear: DTC 34 will clear when, with both "36 VLR" power supplies in a discharged state, the voltage measured at "Driver Source Sense" terminal "A5" and "Passenger Source Sense" terminal "A6" are simultaneously within specified range of "Ignition 1" voltage. When neither the failure nor clear conditions are met, the state of the Diagnostic Trouble Code from the previous ignition cycle is used.

POSSIBLE CAUSES:
Test Description: Number(S) below refer to circled number(S) on the diagnostic chart.
1. This test checks for an open in the "Ignition 1" circuit between the splice and the Dual Pole Arming Sensor.
2. This test determines if the malfunction is internal to the Dual Pole Arming Sensor.

DIAGNOSTIC AIDS:
An intermittent condition is likely to be caused by an improper connection at dual pole arming sensor terminal "A" or "D" and "F" improper connection at DERM terminal "A5" and "A6," open ignition feed to the dual pole arming sensor, open "Driver Source Sense" circuit and open "Passenger Source Sense" circuit, or malfunctioning dual pole arming sensor ignition diodes. The test for this diagnostic trouble code is only run while the "INFLATABLE RESTRAINT" warning lamp is performing the bulb check. When a scan tool "Clear Codes" command is issued and the malfunction is still present, the DTC will not reappear until the ignition switch is turned "OFF" for at least two minutes with the entire SIR system connected and then the ignition switch is turned "ON."