DTC 16

Circuit Description
When the ignition switch is turned to 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 that they are within their respective normal voltage ranges. The SDM then proceeds with the resistance measurement test. Passenger low terminal A8 is grounded through a current sink, and the passenger current source is connected to the passenger high terminal to allow a known amount of current to flow. By monitoring the voltage difference between the passenger high and passenger low terminals, the SDM calculates the combined resistance of the passenger inflator module, harness wiring, and connector terminal contacts.

DTC 16 Will Set When
The resistance of the passenger deployment loop is not in a specified value. The lest is run once each ignition cycle during the resistance measurement test when
- No higher priority faults are detected when the ignition is turned ON.
- Ignition 1 voltage is above a specified value.

Action Taken
The SDM will turn ON the AIRBAG indicator and set a diagnostic trouble code (DTC) 16.

DTC 16 Will Clear When
The ignition switch is turned OFF or the scan tool CLEAR CODES command is received.

Test Description
The number(s) below refer to step(s) on the diagnostic table.

3. See the first caution below.
6. See the first caution below.
10. See the cautions below.

Diagnostic Aids
An intermittent condition is likely to be caused by a short between the passenger high and low circuits, a short between the passenger high circuit and the driver high circuit, or a short between the passenger high circuit and the driver low circuit. The problem could also be a malfunctioning shorting bar in the passenger airbag connector, which would require replacement of the passenger airbag module. The test for this DTC is run only while the AIRBAG indicator is performing the turn-on test. When a scan tool CLEAR CODES command is issued while the malfunction is still present, the DTC will not reappear until the next ignition cycle.

Steps 1 - 7:

Steps 8 - 11:

DTC 16 - Passenger Deployment Loop Shorted

CAUTION: The SDM can maintain sufficient voltage to deploy the airbags for 10 minutes after the ignition is OFF and the fuse has been removed. If the air - bags are not disconnected, service cannot begin until 10 minutes have passed after disconnecting power to the SDM.

CAUTION: During service procedures, be very careful when handling the SDM. Never strike or jar the SDM.

Never power up the SIR system when the SDM is not rigidly attached to the vehicle. All SDM mounting bolts must be carefully tightened, and the SDM arrow must be pointing toward the front of the vehicle to ensure proper operation of the SIR system. The SDM could be activated if it is powered when it is not rigidly attached to the vehicle, resulting in unexpected deployment and possible injury.