Chime Warning System: Description

WARNING: This page is about a different car, the 2004 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.

A chime warning system is standard factory-installed equipment on this model. The chime warning system uses a single chime tone generator that is integral to the Central Timer Module (CTM) to provide an audible indication of various vehicle conditions that may require the attention of the vehicle operator. The chime warning system includes the following major components, which are described in further detail elsewhere in this service information:

Central Timer Module - The Central Timer Module (CTM) is located on the cowl side inner panel, below the driver side end of the instrument panel. The CTM contains an integral chime tone generator, integrated circuitry, a central processing unit, and the programming to provide all of the proper chime warning system features based upon the monitored inputs. The CTM circuitry monitors hard wired switch inputs as well as electronic messages received over the Programmable Communications Interface (PCI) data bus network from other electronic modules in the vehicle.
Door Ajar Switch - Door ajar switches are integral to each door latch. These switches provide inputs to the chime warning system indicating whether a door is opened or closed.
Headlamp Switch - The headlamp switch is located on the instrument panel outboard of the steering column. The headlamp switch provides an input to the chime warning system indicating whether any interior or exterior lighting is turned On or Off.
Ignition Switch - A key-in ignition switch is integral to the ignition switch. The key-in ignition switch provides an input to the chime warning system indicating whether a key is present in the ignition lock cylinder.

Hard wired circuitry connects many of the chime warning system components to each other through the electrical system of the vehicle. These hard wired circuits are integral to several wire harnesses, which are routed throughout the vehicle and retained by many different methods. These circuits may be connected to each other, to the vehicle electrical system and to the chime warning system components through the use of a combination of soldered splices, splice block connectors, and many different types of wire harness terminal connectors and insulators. Refer to SYSTEM WIRING DIAGRAMS . The wiring information includes wiring diagrams, proper wire and connector repair procedures, further details on wire harness routing and retention, as well as pin-out and location views for the various wire harness connectors, splices and grounds.

The CTM chime warning system circuitry and the integral chime tone generator cannot be adjusted or repaired. If the CTM or the chime tone generator are damaged or faulty, the CTM unit must be replaced,