DTC 17

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. After 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 passenger high and passenger low, the SDM calculates the combined resistance of the passenger inflator module, the harness wiring, and the connector terminal contacts.

DTC 17 Will Set When
The resistance of the passenger deployment loop is above a specified value for 100 milliseconds. The resistance is monitored during the deployment loop continuity test and during continuous monitoring.

Action Taken
The SDM will turn on the AIRBAG indicator and set a diagnostic trouble code (DTC) 17.

DTC 17 Will Clear When
The resistance of the passenger deployment loop is below a specified value for 100 milliseconds during continuous monitoring.

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

3. See the first caution below.
8. See the cautions below.

Diagnostic Aids
An intermiffent condition is likely to be caused by a poor connection, either at the passenger airbag connector or at terminals A3 and A8 of the SDM. An open wire in the passenger deployment loop will also set DTC 17.

Steps 1 - 6:

Steps 7 - 8:

DTC 17 - Passenger Deployment Loop Open

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.