RAM 3500 Truck 4WD L6-5.9L DSL Turbo VIN C (2002)
Fig. 2 Central Timer Module (High-Line/Premium)
CENTRAL TIMER MODULE
Three versions of the Central Timer Module (CTM) are available on this vehicle, a base version, a high-line version, and a premium version. Whichever
version of the CTM the vehicle is equipped with, it is concealed under the driver side end of the instrument panel inboard of the instrument panel
steering column opening, where it is secured to a stamped steel bracket that is integral to the instrument panel armature. The CTM is enclosed in a
molded plastic housing with one (base) or two (high-line/premium) integral external connector receptacles that connect it to the vehicle electrical system
through one (base) or two (high-line/premium) take outs with connectors from the instrument panel wire harness.
The base version of the CTM is used on base models of this vehicle. It is also sometimes referred to as the Integrated Electronic Module (IEM). The
base version of the CTM combines the functions of a chime module and an intermittent wipe module in a single unit. The high-line version of the CTM
is used on high-line vehicles. The high-line CTM provides all of the functions of the base version of the CTM, but also is used to control and integrate
many additional electronic functions and features included on highline models. The premium version of the CTM is the same as the high-line version, but
is used only on models equipped with the heated seat option.
The high-line and premium versions of the CTM utilize integrated circuitry and information carried on the Chrysler Collision Detection (CCD) data bus
network along with many hard wired inputs to monitor many sensor and switch inputs throughout the vehicle. In response to those inputs, the internal
circuitry and programming of the CTM allow it to control and integrate many electronic functions and features of the vehicle through both hard wired
outputs and the transmission of electronic message outputs to other electronic modules in the vehicle over the CCD data bus.
The high-line or premium Central Timer Module (CTM) is located under the driver side end of the instrument panel, inboard of the instrument panel
steering column opening. The high-line or premium CTM contains a microprocessor and software that allow it to provide many electronic functions and
features not available with base version of the CTM, including the VTSS. The CTM provides all of the proper VTSS features and outputs based upon the
monitored inputs. The CTM circuitry monitors hard wired switch inputs, as well as message inputs received from other vehicle electronic modules over
the Chrysler Collision Detection (CCD) data bus network.
The Ram Truck utilizes three different modules to control various vehicle systems. The base model, or Integrated Electronic Module (IEM), does not
communicate on the CCD bus and will not be addressed. The other two models are Central Timer Modules (CTM)s, a high line version, and a premium
version. The high line version controls the following functions:
Automatic Door Lock - The high-line/premium CTM provides an optional automatic door lock feature (also known as rolling door locks). This is a
programmable feature.
Central Locking - The high-line/premium CTM provides an optional central locking/unlocking feature.
Chimes - All versions of the CTM provide chime service through an integral chime tone generator.
Courtesy Lamps - The high-line/premium CTM provides courtesy lamp control with timed load shedding.
Door Lock Inhibit - The high-line/premium CTM provides a door lock inhibit feature.
