Self-Diagnostic Mode

WARNING: This page is about a different car, the 1995 Dodge Stratus and 1995 Chrysler Cirrus. However, it is still accessible from the selected car via links, so may be relevant.

VTSS self-diagnostic mode verifies operation of all monitored switches/circuits. There are NO codes for the VTSS, only symptoms. VTSS self-diagnostic mode can be entered only with scan tool.

Upon entering self-diagnostic mode, horn should sound at each of the following events, to indicate proper operation.

Beginning with doors closed, open then close each door. The horn should sound when door ajar switch closes and then again when switch opens. Wait one second when opening/closing door ajar switch (door).
Open and close hood. The horn should sound when hood is opened then closed. Actuate power door locks in both the lock and unlock direction. The horn should sound after each actuation.
Using key, rotate each door lock cylinder to unlock position. The horn should sound when switch closes and then again when switch opens. Wait one second when opening/closing switch, or the horn will not sound.
Turn ignition switch to RUN position. Horn should sound once to indicate proper operation of ignition (switch) input. This step will also take VTSS module out of self-diagnostic mode.