RAM 2500 Truck 2WD L6-5.9L DSL Turbo VIN C (2002)
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.
Enhanced Accident Response - The high-line/ premium CTM provides an optional enhanced accident response feature. This is a programmable feature.
Heated Seats - The premium CTM controls the optional heated seat system by controlling the operation of the heated seat relay.
Illuminated Entry - The high-line/premium CTM provides a timed illuminated entry feature.
Intermittent Wipe Control - All versions of the CTM provide control of the intermittent wipe delay, and wipe-after-wash features.
Panic Mode - The high-line/premium CTM provides support for the optional RKE system panic mode features.
Power Lock Control - The high-line/premium CTM provides the optional power lock system features, including support for the automatic door lock
and door lock inhibit modes.
Programmable Features - The high-line/premium CTM provides support for certain programmable features.
Remote Keyless Entry - The high-line/premium CTM provides the optional Remote Keyless Entry (RKE) system features, including support for the
RKE Lock (with optional horn chirp), Unlock, Panic, and illuminated entry modes, as well as the ability to be programmed to recognize up to four RKE
transmitters. The RKE horn chirp is a programmable feature.
Remote Radio Switch Interface - The high-line/premium CTM monitors and transmits the status of the optional remote radio switches.
Speed Sensitive Intermittent Wipe Control - The high-line/premium CTM provides the speed sensitive intermittent wipe feature.
Vehicle Theft Alarm - The high-line/premium CTM provides control of the optional Vehicle Theft Alarm features, including support for the central
locking/unlocking mode.
The premium CTM is used only on vehicles equipped with the heated seat feature. The premium CTM will control the above functions and, in addition,
controls the heated seat relay. The CTM is mounted to a bracket welded to the instrument panel inboard of the steering column, behind the kneeblocker.
The connectors are a white 18-way and a green 14-way.
Diagnostics
The CTM is fully addressable with the DRB III (R) and it is the recommended method for diagnosis. The CTM reports 6 Diagnostic Trouble Codes. All
of the inputs to the CTM can be read with the DRB III (R) and the outputs can be actuated. If the inputs are OK and the outputs can be cycled with the
DRB III (R), the problem is usually the Central Timer Module.
