RAM 2500 Truck 2WD L6-5.9L DSL Turbo VIN C (2002)
Security Lamp/Indicator: Description and Operation
VTSS Indicator - A red Light Emitting Diode (LED) located on the lower surface of the overhead console near the windshield is illuminated by an
output of the Central Timer Module (CTM) to indicate the status of the VTSS. This LED is integral to the electronic circuit board for the Compass
Mini-Trip Computer (CMTC).
The Vehicle Theft Security System (VTSS) indicator consists of a red Light-Emitting Diode (LED) located on the electronic circuit board of the
Compass Mini-Trip Computer (CMTC) within the overhead console. The LED extends through a hole in the CMTC lens located near the forward end
of the overhead console housing near the windshield.
The VTSS indicator cannot be adjusted or repaired and, if faulty or damaged, the entire CMTC unit must be replaced. (Refer to OVERHEAD
CONSOLE/COMPASS/MINI-TRIP COMPUTER - DESCRIPTION). See: Driver/Vehicle Information Display
The Vehicle Theft Security System (VTSS) indicator gives a visible indication of the VTSS arming status. One side of Light-Emitting Diode (LED) in
the VTSS indicator is connected to battery current through a fused B(+) circuit and a fuse in the Junction Block (JB), so the indicator remains functional
regardless of the ignition switch position. The other side of the LED is hard wired to the Central Timer Module (CTM), which controls the operation of
the VTSS indicator by pulling this side of the LED circuit to ground. When the VTSS arming is in progress, the CTM will flash the LED rapidly ON and
OFF for about 15 seconds. When the VTSS has been successfully armed, the CTM will flash the LED ON and OFF continually at a much slower rate
until the VTSS has been disarmed. The VTSS indicator can be diagnosed using conventional diagnostic tools and methods.
