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 ignition lamp time delay relay in 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.

Both versions of the CTM are mounted under the passenger side end of the instrument panel, outboard of the instrument panel glove box opening. For diagnosis of the base version of the CTM, refer to Central Timer Module in the Diagnosis and Testing section of Group 8U - Chime/Buzzer Warning Systems.

For diagnosis of the high-line version of the CTM or the CCD data bus, the use of a DRB scan tool and the proper Diagnostic Procedures manual are recommended. The CTM cannot be repaired and, if faulty or damaged, it must be replaced.


Some of the functions and features that the CTM supports or controls include:

Chimes for the following conditions:

  • Headlamps on with ignition off and driver door open warning
  • Key in ignition with ignition off and driver door open warning
  • ABS lamp warning (if the vehicle is so equipped)
  • Airbag lamp warning
  • Check gauges lamp warning
  • Door ajar lamp warning
  • Low fuel lamp warning
  • Low washer fluid lamp warning
  • Seat belt reminder lamp warning
  • Transmission oil temperature lamp warning (automatic transmission)
  • Central locking
  • Courtesy lamp defeat
  • Courtesy lamp time-out (high-line only)
  • Intermittent wipe control
  • Enhanced accident response (high-line only)
  • Horn chirp upon door lock with RKE (customer programmable) (high-line only)
  • Illuminated entry (high-line only)
  • Power door lock control (high-line only)
  • Power lock inhibit (high-line only)
  • Remote Keyless Entry (RKE) (high-line only)
  • Remote radio switches (high-line only)
  • Rolling door locks (customer programmable) (high-line only)
  • Speed sensitive intermittent wipe (high-line only)
  • Vehicle Theft Security System (VTSS) (high-line only) (if the vehicle is so equipped)
  • Wipe after wash (high-line only).

More information on the operation of these CTM features and functions can be found in the group that covers the system to which that feature or function applies.

    Dodge Durango (DN) 1998-2003 Service Manual


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