DTC 16

DTC 16 Passenger Deployment Loop Resistance Low




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 resistor 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 16 (Steps 1 - 3):

DTC 16 (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 connection of the yellow 2-pin connector.
4. This test cheeks for proper operation of the shorting clip in the yellow 2-pin connector.
5. The test checks for a malfunction passenger air bag assembly.
6. This test determines whether the malfunctioning is due to shorting in the wiring.

Diagnostic Aids:
An intermittent condition is likely to be caused by a short between Circuits(CKTs) IB07-YELLOW/GREEN and IB08-YELLOW/RED, or a malfunctioning shorting clip on the passenger air bag assembly which would require replacement of the air bag assembly. The test for this diagnostic trouble code is only run while "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.