DTC 15

Test F: DTC 15 Passenger Initiator Circuit Resistance High:

Supplemental Inflatable Restraint (SIR):

OPERATION:
During the "Initiator Assembly Resistance Test" the DERM grounds the "Driver Side Low" terminal "B8" and turns "ON" the passenger current source at the "Passenger Side High" terminal "A7". This causes a known amount of current to flow through the passenger initiator circuit. By monitoring the difference between the voltage at the "Passenger Side High" terminal "A7" and the "Passenger Side Low" terminal "B7" the DERM calculates the combined resistance of the passenger inflator module, harness wiring CKTs 1403A and 1404A and connector terminal contact.

Test Conditions: Tested once each ignition cycle during the "Initiator Assembly Resistance Test" when: 1) No "higher priority faults" are detected during "Turn-ON", 2) No "higher priority faults" are detected during "Continuous Monitoring" for 1 second, 3) No "CRANK" signal present, 4) "Ignition 1" voltage is above a specified value.

Failure Conditions: DTC 15 will set when the combined resistance of the passenger inflator module, harness wiring CKT 1403A and connector terminal contact is above a specified value.

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

Conditions to Clear: DTC 15 will clear each time the ignition switch is turned "OFF".

POSSIBLE CAUSES:
Test Description: Number(S) below rater to circled number(S) on the diagnostic chart.
1. This test determines whether the malfunction is in the passenger inflator module circuitry or in the DERM wiring harness circuitry.
2. This test determines whether the malfunction is an open in CKT 1403A.

DIAGNOSTIC AIDS:
An intermittent condition is likely to be caused by a poor connection to the passenger inflator module at terminal "A" or terminal "B" or a poor connection to the DERM at terminal "A7."

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 next ignition cycle.