On-Demand Self Test

The On-Demand Self Test option is used to verify that no electrical concerns exist with the air bag Supplemental Restraint System (SRS). Upon entering the self test, the air bag Electronic Crash Sensor (ECS) module will make an electrical check of each electrical component in the system. If a concern is detected, a DTC is displayed on the New Generation Star (NGS) Tester with a brief description of the DTC. Concerns detected during the self test are not stored in memory, unless the same concern was also detected during normal vehicle operation. The self test should always be run after any repair to verify that the repair was successful.

To run the On-Demand Self Test, follow these steps:
1. Connect the NGS Tester to the Data Link Connector (DLC).
2. Turn the ignition switch to the RUN position.
3. Select the MODEL YEAR and VEHICLE.
4. Select DIAGNOSTIC DATA LINK.
5. Select ECS (air bag electronic crash sensor module).
6. Select DIAGNOSTIC TEST MODES.
7. Select ON-DEMAND SELF TEST.
8. Press START and then TRIGGER. The ECS will run the On-Demand Self Test and display on-demand DTCs (reflecting hard system concerns) on the screen.