DTC 15

DTC 15 Passenger Deployment Loop Resistance High




Circuit Description:
When the ignition switch is turned "ON", the Sensing and Diagnostic Module (SDM) will perform tests to diagnose critical malfunctions within itself. Upon passing these tests "ignition 1", and deployment loop voltages are measured to ensure they are within their respective normal voltage ranges. The SDM then proceeds with the "Resistance Measurement Test". "Passenger Bag Low" terminal "16" is grounded through a resister and the passenger current source connected to "Passenger Bag High" terminal "15" allows a known amount of current to flow. By monitoring the voltage difference between "Passenger Bag High" and "Passenger Bag Low" the SDM calculates the combined resistance of the passenger air bag assembly, harness wiring Circuits(CKTs) IB07-YELLOW/GREEN and IB08-YELLOW/RED connector terminal contact.

DTC Will Set When:
The combined resistance of the passenger air bag assembly, harness wiring CKTs IB07-YELLOW/GREEN and IB08-YELLOW/RED, and connector terminal contact is above a specified value. This test is run once each ignition cycle during the "Resistance Measurement Test" when:

1. No "higher priority faults" are detected during "Turn-ON."
2. "Ignition 1" voltage is in the specified value.

Action Taken:
SDM turns "ON" the "AIR BAG" warning lamp and sets a diagnostic trouble code.

DTC Will Clear When:
The ignition switch is turned "OFF".

DTC 15 (Steps 1 - 3):

DTC 15 (Steps 4 - 7):

DTC Chart Test Description:
Number(s) below refer to step number(s) on the diagnostic chart:

2. This test determines whether the malfunction is in the Sensing and Diagnostic Module (SDM).
3. This test verifies proper connection of the yellow 2-pin connector.
4. This test checks for proper contact and/or corrosion of the yellow 2-pin connector terminals.
5. The test checks for a malfunctioning passenger air bag assembly.
6. This test determines whether the malfunction is due to high resistance in the wiring.

Diagnostic Aids:
An intermittent condition is likely to be caused by a poor connection at the passenger air bag assembly harness connector terminals "1" and "2", SDM terminal "15" and "16", or a poor wire to terminal connection in Circuits(CKTs)IB07-YELLOW/GREEN and IB08-YELLOW/RED. This test for this diagnostic trouble code is only run while the "AIR BAG" warning lamp is performing the bulb check, unless Diagnostic Trouble Code (DTC) 17 or DTC 26 is detected. 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.