DTC 16

Test G: DTC 16 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 16 will set when the combined resistance of the passenger inflator module, harness wiring CKTs 1403A and 1404A and connector terminal contact is below a specified value.

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

Conditions to Clear: DTC 16 will clear each time the Ignition switch is turned "OFF".

POSSIBLE CAUSES:
Test Description: Number(S) below refer to circled number(S) on the diagnostic chart.
1. DTC 16 and 22 will set simultaneously when the "Driver Side High" circuit is shorted to the "Passenger Side High" circuit due to parallel current paths.
2. This test determines whether the malfunction is in the passenger inflator module circuitry or in the DERM wiring harness circuitry.
3. This test checks for a short from the "Passenger Side High" circuit to the "Passenger Side Low" or "Driver Side Low" circuit.
4. This test checks for a short from the "Passenger Side High" circuit to the "Driver Side Low" circuit.

DIAGNOSTIC AIDS:
An intermittent condition is likely to be caused by a short between CKT 1403 and CKTs 347, 348 or 1404.

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.