Audible Warning Device Control Module: Description and Operation

For additional information on the [1][2]Central Timer Module, refer to Powertrain Management / Computers and Control Systems / Body Control Module. Body Control Module

[1][2]CENTRAL TIMER MODULE
Three versions of the Central Timer Module ([1][2]CTM) are available on this vehicle, a base version, a high-line version and a premium version. The base version of the CTM is used on base models of the 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/buzzer module, an intermittent wipe module, and an ignition lamp time delay relay in a single unit.

All versions of the [1][2]CTM support the intermittent wipe and wipe-after-wash features, but only the high-line and premium versions of the CTM support the speed sensitive intermittent wipe. The intermittent wipe relay is one of the outputs that all versions of the CTM can control. Each CTM is programmed to energize or de-energize the intermittent wipe relay in response to certain inputs from the windshield wiper and washer switches and from the windshield wiper motor park switch.

For the speed sensitive intermittent wipe feature, the high-line and premium [1][2]CTM also uses vehicle speed messages, which are received on the CCD data bus from the Powertrain Control Module (PCM).

See Wiper System in the Diagnosis and Testing for diagnosis of the base version of the [1][2]CTM. For diagnosis of the high-line or premium version of the CTM or the CCD data bus, a DRB III scan tool and the proper Diagnostic Procedures are recommended. The CTM cannot be repaired and, if faulty or damaged, it must be replaced.

The high-line version of the [1][2]CTM is used on high-line 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 high-line 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 contain 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.

All versions of the [1][2]CTM are mounted under the driver side end of the instrument panel, inboard of the instrument panel steering column opening. For diagnosis of the base version of the CTM, refer to [1][2]Central Timer Module in the Diagnosis and Testing. For diagnosis of the high-line or premium versions of the CTM or the CCD data bus, the use of a DRB III scan tool and the proper Diagnostic Procedures are recommended. The CTM cannot be repaired and, if faulty or damaged, it must be replaced.

Some of the functions and features that the [1][2]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 engine lamp warning
- Check gauges 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 time-out (high-line only)
- Heated seats (premium only)
- Ignition key lamp timer
- Intermittent wipe control
- Enhanced accident response (high-line only)
- Horn chirp upon door lock with RKE (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 (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 [1][2]CTM features and functions that covers the system to which that feature or function applies.

The high-line or premium Central Timer Module (CTM) can also control some features of the audio system when the vehicle is equipped with the optional RAZ radio receiver and remote radio switches. A high-line [1][2]CTM is used on high-line versions of this vehicle. A premium CTM is used on vehicles equipped with the optional heated seats. The CTM combines the functions of a chime/buzzer module, an intermittent wipe module, an illuminated entry module, a remote keyless entry module, and a vehicle theft security system module in a single unit.

The high-line or premium [1][2]CTM also controls and integrates many of the additional electronic functions and features included on models with this option. The RAZ radio receiver with a remote radio switch option is one of the features that the CTM controls. The CTM is programmed to send switch status messages over the Chrysler Collision Detection (CCD) data bus to control the volume, seek, and pre-set station advance functions of the RAZ radio receiver. The CTM monitors the status of the remote radio switches located on the steering wheel through a hard wired circuit. The CTM then sends the proper switch status messages to the radio receiver. The electronic circuitry within the radio receiver responds to the switch status messages it receives by adjusting the radio settings as requested.

Refer to Remote Radio Switch in the Description and Operation for more information on this component. In addition, radio receivers connected to the CCD data bus have several audio system functions that can be diagnosed using a DRB III scan tool. Refer to the proper Diagnostic Procedures for more information on DRB III testing of the audio systems.

The high-line or premium Central Timer Module (CTM) can also operate the horn system. A high-line [1][2]CTM is used on high-line versions of this vehicle. A premium CTM is used on vehicles equipped with the optional heated seats. The CTM combines the functions of a chime/buzzer module, an intermittent wipe module, an illuminated entry module, a remote key- less entry module, and a vehicle theft security system module in a single unit.

The high-line or premium [1][2]CTM controls features and functions of the power lock, illuminated entry, and Remote Keyless Entry (RKE) systems. The high-line CTM receives hard-wired inputs from the power lock switches, CCD message inputs from the Power-train Control Module (PCM) and Airbag Control Module (ACM), and coded radio frequency inputs from the RKE transmitters. In response to those and many other inputs, the internal programming of the CTM sends the proper outputs to control the power lock motors, the headlamp (or security) and horn relays, and the courtesy lamps.

Some of the features and functions of the power lock, illuminated entry and RKE systems made possible because of the communication of the [1][2]CTM on the CCD data bus network include:
- A door-lock inhibit feature which prevents the power lock system from being energized with a power door lock switch if the key is in the ignition and/or the headlamps are on. However, the locks can still be operated manually, with a key, or energized with the RKE transmitter.
- A Panic Mode feature which can provide additional personal security and protection. When the Panic button on the RKE transmitter is depressed the vehicle horn will pulse, the headlights will flash, and the interior lights will illuminate on the vehicle for about three minutes, or until the Panic button is depressed a second time. A vehicle speed of about 24 kilometers-per-hour (15 miles-per-hour) will also cancel the panic mode.
- A central locking feature. Central locking allows both doors on the vehicle to be locked when a key is used in either front door lock cylinder to lock either front door. Similarly, central locking will also unlock both front doors when the key is rapidly cycled twice to the unlock position in either front door lock cylinder. This feature uses inputs from the two door lock cylinder switches, which are components of the VTSS. Refer to Vehicle Theft Security System for more information on the door lock cylinder switches.
- An enhanced accident response feature will unlock both doors, then prevent the power door locks from locking the doors for a predetermined time interval, after receiving a CCD message from the ACM indicating a frontal impact of the vehicle requiring airbag deployment. This feature will also turn on the courtesy lamps ten seconds after receiving the ACM deployment message, if the CCD vehicle speed message from the PCM indicates that the vehicle is not moving. Of course, these responses are dependent upon functional battery power and wiring circuitry following the impact.

Rolling door locks is a programmable feature of the power lock system. This feature will automatically lock all of the doors after the vehicle reaches a speed of about 24 kilometers-per-hour (15 miles-per-hour) or greater. This feature will also lock the doors if a door is opened, then closed again, at any speed above 24 kilometers-per-hour (15 miles-per-hour).

A programmable feature of the RKE system is the enabling or disabling of the horn chirp following activation of the RKE Lock function. This feature can be enabled or disabled and, if enabled, the horn chirp duration (twenty or forty milliseconds) can be selected.

All versions of the [1][2]CTM are mounted under the driver side end of the instrument panel, inboard of the instrument panel steering column opening. Refer to [1][2]Central Timer Module in the Removal and Installation for the service procedures.

The programmable features of the [1][2]CTM can be enabled or disabled using the DRB III scan tool as described in the proper Diagnostic Procedures. Refer to [1][2]Central Timer Module in the Diagnosis and Testing for diagnosis of the base version of the CTM. For diagnosis of the high-line or premium version of the CTM or of the CCD data bus, a DRB III scan tool and the proper Diagnostic Procedures are recommended. The CTM cannot be repaired and, if faulty or damaged, it must be replaced.

One of the features that the high-line or premium [1][2]CTM supports and controls is the Vehicle Theft Security System (VTSS). In the VTSS, the CTM receives hard-wired inputs from the door jamb, door lock cylinder, and ignition switches. The programming in the CTM allows it to process the information from these inputs and send control outputs to energize or de-energize the headlamp (or security) relay, horn relay, and the security lamp. The CTM also sends CCD data bus messages to the Powertrain Control Module (PCM) to control the engine no-run feature of the VTSS.

The high-line or premium [1][2]CTM also contains the receiver and control logic for the power lock and Remote Keyless Entry (RKE) systems, which are integrated into the arming, disarming, and triggering functions of the VTSS.

Enhanced Accident Response (Highline [1][2]CTM only)
If the Airbag Control Module (ACM) deploys the airbags, a message is transmitted over the CCD bus to the CTM module to unlock the doors. The interior lights will be turned ON 10 seconds after getting zero speed message on the CCD bus.

Diagnostics
The [1][2]CTM is fully addressable with the DRB II 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 and the outputs can be actuated. If the inputs are OK and the outputs can be cycled with the DRB, the problem is usually the [1][2]Central Timer Module.

[1][2]Central Timer Module
DIAGNOSTIC TROUBLE CODES
Cylinder Lock Switch Failure
Door lock Switch Failure
Door Unlock Switch Failure
Wiper Park Switch Failure
EEPROM Checksum Failure
Internal ROM Test Failure

The high-line or premium [1][2]CTM also controls and integrates many of the additional electronic functions and features included on models with this option. The horn relay is one of the hard wired outputs of the CTM. The high-line or premium CTM is programmed to energize or de-energize the horn relay in response to certain inputs from the Vehicle Theft Security System (VTSS) and/or the Remote Keyless Entry (RKE) system.

Refer to Vehicle Theft Security System in the Description and Operation of Vehicle Theft/Security Systems for more information on the VTSS. Refer to Remote Keyless Entry System in the Description and Operation for more information on the RKE system.