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Dodge Durango
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Chime/Buzzer Warning Systems » Description and operation
Central timer module

Two versions of the central timer module (ctm) are available on this vehicle, a base version and a high-line version. The base version of the ctm is used on base models of the vehicle. The base version of the ctm combines the functions of a chime/buzzer module, an intermittent wipe module, and an illuminated entry module into a single unit. The base ctm also uses inputs from the door ajar switches, the headlamp switch and the key-in ignition switch to control the output to the dome lamp circuits, which allows the base ctm to provide load shedding to help protect the battery from becoming discharged.

The high-line version of the ctm is used on highline vehicles. The high-line ctm provides all of the functions of the base version ctm, but also is used to control and integrate many of the additional electronic functions and features included on the highline models. The high-line version of the ctm contains a central processing unit and interfaces with other modules in the vehicle on the chrysler collision detection (ccd) data bus network.

The ccd data bus network allows the sharing of sensor information. This helps to reduce wire harness complexity, reduce internal controller hardware, and reduce component sensor current loads. At the same time, this system provides increased reliability, enhanced diagnostics, and allows the addition of many new feature capabilities.

One of the functions and features that both versions of the ctm support is the chime warning system.

The ctm contains a chime tone generator to perform the functions of the chime warning module.

The ctm uses hard-wired switch inputs, internal Programming, and a hard-wired chime request input from the instrument cluster circuitry to detect when a chime tone is required.

Both versions of the ctm are mounted under the passenger side end of the instrument panel, outboard of the instrument panel glove box opening. Refer to central timer module in the removal and installation section of group 8e - instrument panel systems for the service procedures.

This group covers the diagnosis and service of only the hard-wired inputs used by the ctm to determine that a chime tone should be generated. See central timer module in the diagnosis and testing section of this group for diagnosis of the base version of the ctm. For diagnosis of the high-line version of the ctm or of the ccd data bus, a drbiiit scan tool and the proper diagnostic procedures manual are recommended. The ctm cannot be repaired and, if faulty or damaged, it must be replaced.

    More about «Description and operation»:

    Central timer module

    Instrument cluster

    Driver door ajar switch

    Key-in ignition switch

    Headlamp switch

    Driver seat belt switch

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