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POWER LOCK SYSTEM
Two different power lock systems are offered as optional factory-installed equipment on this model. Both power lock systems are offered only on models that are also equipped with power windows. On vehicles that are not equipped with the optional Vehicle Theft Security System (VTSS), the power lock system control components are integral to a power lock and Remote Keyless Entry (RKE) module. Vehicles that are equipped with the VTSS option have their power lock system control components integral to a microprocessor-based Central Timer Module (CTM). Both power lock systems allow all of the doors to be locked or unlocked electrically by operating the switch on either front door; however, the CTM-based power lock system offers several additional features that are not available with the power lock and RKE module-based system.

Both versions of the power lock system include the following major components, which are described in further detail elsewhere in this service information:
- Power Lock Motors - A reversible electric motor integral to the door latch of each front door, or remotely mounted and operating the latch through a linkage rod within each side and rear door, locks or unlocks the door latch when provided with the appropriate electrical inputs.
- Power Lock Switches - A power lock switch is secured in the mirror flag trim bezel near the front of each front door and allows the power lock system to be operated by either the driver or the front seat passenger.

The power lock system may also include some, but not all, of the following components, depending upon whether the vehicle is equipped with the optional VTSS:
- Central Timer Module - A Central Timer Module (CTM) is used on this vehicle when it is equipped with the optional Vehicle Theft Security System (VTSS). The CTM is concealed under the instrument panel, where it is secured with three screws to the inboard side of the left center instrument panel support above the engine housing. The CTM provides the proper power lock system features based upon the monitored inputs. The CTM circuitry monitors hard wired switch inputs, as well as message inputs received from other vehicle electronic modules on the Chrysler Collision Detection (CCD) data bus network. (Refer to ELECTRONIC CONTROL MODULES/BODY CONTROL/CENTRAL TIMER MODULE - DESCRIPTION).
- Door Cylinder Lock Switches - A resistor-multiplexed switch located on the back of each front door lock cylinder of models equipped with the optional VTSS, allows the power lock system to be operated using a key inserted in either the driver or passenger front door lock cylinder.
- Power Lock and Remote Keyless Entry Module - A power lock and Remote Keyless Entry (RKE) module is used on vehicles that are not equipped with the optional Vehicle Theft Security System (VTSS). The power lock and RKE module is concealed under the instrument panel, where it is secured with two screws to the inboard side of the left center instrument panel support above the engine housing. The power lock and RKE module contains integrated circuitry and programming that allow it to provide the proper power lock system features based upon numerous hard wired inputs.

Some of the additional features of the power lock system found in vehicles with the VTSS option include:
- Automatic Door Lock - The CTM provides an optional automatic door lock feature (also known as rolling door locks). This is a programmable feature.
- Central Locking - The CTM provides a central locking/unlocking feature.
- Door Lock Inhibit - The CTM provides a door lock inhibit feature.
- Enhanced Accident Response - The CTM provides an optional enhanced accident response feature. This is a programmable feature.

Hard wired circuitry connects the power lock system components to 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 power lock 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.

Many of the electronic features in the vehicle controlled or supported by the CTM are programmable using the DRB III scan tool. In addition, the CTM software is Flash compatible, which means it can be reprogrammed using Flash reprogramming procedures. However, if any of the CTM hardware components are damaged or faulty, the entire CTM unit must be replaced.

Both versions of the power lock system allow all doors to be locked or unlocked electrically by operating the power lock switch on either front door mirror flag trim bezel. Both versions also include a delay door lock feature which, if a side or rear auxiliary door is open when a power lock system Lock input is received, will automatically lock all of the doors again about five seconds after all of the doors are closed. On vehicles that are also equipped with the optional Vehicle Theft Security System (VTSS), all doors may also be locked or unlocked using a key in either front door lock cylinder. On vehicles with VTSS, if certain features have been electronically enabled, the locks may also be operated automatically by the Central Timer Module (CTM) based upon various other inputs. Those features and their inputs are:
- Automatic Door Lock - If enabled, the CTM will automatically lock the doors when it receives a message from the Powertrain Control Module (PCM) indicating that the vehicle speed is about 24 km/h (15 mph) or greater. The CTM also monitors the door ajar switches, and will not activate the automatic door lock feature until all doors have been closed for at least five seconds. If this feature is enabled and a door is opened after the vehicle is moving, the CTM will also lock the doors five seconds after all doors are closed.
- Central Locking - Vehicles equipped with a CTM also have a resistor-multiplexed door cylinder lock switch mounted to the back of the door lock cylinder within each front door. The CTM continually monitors the input from these switches to provide the central locking/unlocking feature. The CTM will automatically lock or unlock all doors when either front door is locked or unlocked using a key.
- Door Lock Inhibit - The CTM receives inputs from the key-in ignition switch, the headlamp switch, and the door ajar switches. The logic within the CTM allows it to monitor these inputs to provide a door lock inhibit feature. The door lock inhibit feature prevents the power lock system from being energized with a power lock switch input if the driver door is open with the headlamps ON or with the key still in the ignition switch. However, the locks can still be operated with the manual door lock button or with a key in the door lock cylinder, and the power locks will still operate using the RKE transmitter while the driver door is open with the headlamps ON or with a key in the ignition.
- Enhanced Accident Response - If enabled, the CTM provides an enhanced accident response feature. This feature uses electronic message inputs received by the CTM from the Airbag Control Module (ACM) to determine when an airbag has been deployed. The CTM also monitors the state of the power lock system and the vehicle speed messages from the PCM in order to provide this feature. If the airbag has been deployed and the vehicle has stopped moving, the CTM will automatically unlock the doors, prevent the doors from being locked, and turn ON the courtesy lamps inside the vehicle. Of course, these responses are dependent upon a functional battery and electrical circuitry following the impact.

All versions of the power lock system operate on battery current received through a fused B(+) circuit from a fuse in the fuse block so that the system remains functional, regardless of the ignition switch position. Also, in both versions of the power lock system, each power lock switch receives battery current independent of the other. In both versions of the power lock system, the power lock switches direct a battery current Lock or Unlock request signal to the power lock and Remote Keyless Entry (RKE) module or the CTM, and the module energizes internal relays to direct the appropriate battery current and ground feeds to the power lock motors. The hard wired inputs or outputs of the power lock system can be diagnosed using conventional diagnostic tools and methods; however, for diagnosis of the CTM or the CCD data bus, the use of a DRB III scan tool is required. Refer to the appropriate diagnostic information.

REMOTE KEYLESS ENTRY SYSTEM
Two different Remote Keyless Entry (RKE) systems are offered as optional factory-installed equipment on this model. Both RKE systems are offered only on models that are also equipped with power locks. On vehicles that are not equipped with the optional Vehicle Theft Security System (VTSS), the RKE system control components are integral to a power lock and Remote Keyless Entry (RKE) module. Vehicles that are equipped with the VTSS option have their RKE system control components integral to a microprocessor-based Central Timer Module (CTM). Both RKE systems are radio frequency systems that allow the use of a remote battery-powered radio transmitter to control the power lock system. Both RKE systems include an illuminated entry feature, which turns ON the courtesy lamps for a timed interval (about 30 seconds), when the power door locks are unlocked using the RKE transmitter. However, the CTM-based RKE system offers additional features that are not available with the power lock and RKE module-based system.

The only physical difference between the two RKE systems lies in the location of the system control circuitry and logic, the RKE receiver, and the illuminated entry system relay. Each RKE system includes the RKE transmitters and one of the following modules, which are described in further detail elsewhere in this service information:
- Central Timer Module - A Central Timer Module (CTM) is used on this vehicle when it is equipped with the optional Vehicle Theft Security System (VTSS). The CTM is concealed under the instrument panel, where it is secured with three screws to the inboard side of the left center instrument panel support above the engine housing. The CTM provides the proper RKE system features based upon the monitored inputs. The CTM circuitry monitors Radio Frequency (RF) inputs from the RKE transmitters, hard wired switch inputs, as well as message inputs received from other vehicle electronic modules on the Chrysler Collision Detection (CCD) data bus network. (Refer to ELECTRONIC CONTROL MODULES/BODY CONTROL/CENTRAL TIMER MODULE - DESCRIPTION).
- Power Lock and Remote Keyless Entry Module - A power lock and Remote Keyless Entry (RKE) module is used on vehicles that are not equipped with the optional Vehicle Theft Security System (VTSS). The power lock and RKE module is concealed under the instrument panel, where it is secured with two screws to the inboard side of the left center instrument panel support above the engine housing. The power lock and RKE module contains integrated circuitry and programming that allow it to provide the proper RKE system features based upon Radio Frequency (RF) inputs from the RKE transmitters, and numerous hard wired inputs.
- Keyless Entry Transmitter - The keyless entry transmitter is a small, battery-powered, RF transmitter that is contained within a molded plastic case that is designed to also serve as a convenient key fob.

Some of the additional features of the RKE system found in vehicles with the VTSS option include:
- Horn Chirp - The CTM provides an optional horn chirp feature. This is a programmable feature.
- Vehicle Theft Security System Control - The RKE transmitter also arms and disarms the factory- installed vehicle theft alarm. (Refer to VEHICLE THEFT SECURITY SYSTEM - DESCRIPTION).

Hard wired circuitry connects the RKE system components to 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 RKE and power lock 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. Many of the electronic features in the vehicle controlled or supported by the CTM are programmable using the DRB III scan tool. In addition, the CTM software is Flash compatible, which means it can be reprogrammed using Flash reprogramming procedures. However, if any of the hardware components of the power lock and RKE module or of the CTM are damaged or faulty, the entire module must be replaced.

Both versions of the Remote Keyless Entry (RKE) system allow the power lock system to be operated remotely using the RKE transmitter. Both versions will also provide an illuminated entry feature, which uses a hard wired output to turn ON the interior lighting for a timed interval (about thirty seconds) when a valid Unlock message is received from the RKE transmitter. On vehicles that are equipped with the optional Vehicle Theft Security System (VTSS), the RKE transmitter also arms and disarms the factory-installed Vehicle Theft Security System (VTSS). Two small, recessed buttons on the outside of the transmitter case labelled Lock, and Unlock allow the user to choose the function that is desired. The RKE transmitter then sends the appropriate Radio Frequency (RF) signal. An RF receiver that is integral to the power lock and RKE module or the Central Timer Module (CTM) receives the transmitted signal, then uses its internal electronic programming to determine whether the received signal is valid and what function has been requested. If the signal is valid, the module then provides the programmed outputs to produce the system features.

On vehicles that are equipped with the optional Vehicle Theft Security System (VTSS), the RKE system also provides a programmable horn chirp. If this feature is enabled, when a valid Lock message is received from the RKE transmitter, the CTM provides an audible confirmation by momentarily pulling the control coil of the horn relay to ground through a hard wired circuit output.

The RKE system operates on battery current received through a fused B(+) circuit from a fuse in the fuse block so that the system remains functional, regardless of the ignition switch position. The power lock and RKE module can retain the vehicle access codes of two RKE transmitters. The CTM can retain the vehicle access codes of up to four RKE transmitters. In both versions of the RKE system the transmitter codes are retained in RKE system memory, even if the battery is disconnected. If an RKE transmitter is faulty or is lost, new transmitter vehicle access codes can be programmed into the system. The hard wired inputs or outputs of the RKE system can be diagnosed using conventional diagnostic tools and methods; however, for diagnosis of the CTM or the CCD data bus, the use of a DRB III scan tool is required. Refer to the appropriate diagnostic information.

Door Lock Cylinder Switch Remove/Install:

DOOR CYLINDER LOCK SWITCH
A door cylinder lock switch is snapped onto the back of the key lock cylinder inside each front door of vehicles equipped with the optional Vehicle Theft Security System (VTSS). The door cylinder lock switch is a resistor multiplexed momentary switch that is hard wired in series between a body ground and the Central Timer Module (CTM) through the front door wire harness. The door cylinder lock switches are driven by the key lock cylinders and contain three internal resistors. One resistor is used for the neutral switch position, one for the Lock position, and one for the Unlock position.

The door cylinder lock switches cannot be adjusted or repaired and, if faulty or damaged, they must be replaced.

The door cylinder lock switches are actuated by the key lock cylinder when the key is inserted in the lock cylinder and turned to the lock or unlock positions. The door cylinder lock switch closes a path to ground through one of three internal resistors for the Central Timer Module (CTM) when the front door key lock cylinder is in the Lock, Unlock, or Neutral positions. The CTM reads the switch status through an internal pull-up, then uses this information as an input for both power lock system and Vehicle Theft Security System (VTSS) operation.

The door cylinder lock switches and circuits can be diagnosed using conventional diagnostic tools and methods.

POWER LOCK MOTOR
Models equipped with the optional power lock system have a power operated door locking mechanism located within each of the doors. The lock mechanisms are actuated by a reversible electric power lock motor that is integral to the door latch unit within each front door, dual side door, or dual rear door. The power lock motor used in sliding side doors or single rear doors is remotely mounted and operates the latch lock mechanism through a short connecting link. A single short pigtail wire with a molded plastic connector insulator connects the power lock motor to the vehicle electrical system through a take out and connector of each door wire harness.

The power lock motors cannot be adjusted or repaired and, if faulty or damaged, the motor unit must be replaced. The power lock motors for the front doors can be disassembled from the front door latches for service replacement, the power lock motors for dual side and dual rear doors are serviced as a unit with their door latches, and the power lock motors for sliding side or single rear doors are available for individual service replacement.

The power lock motors are controlled by the battery and ground feeds from either the power lock and Remote Keyless Entry (RKE) module on models without the optional Vehicle Theft Security System (VTSS), or from the Central Timer Module (CTM) on models equipped with the optional VTSS. A positive and negative battery connection to the two motor terminals will cause the power lock motor plunger to move in one direction. Reversing the current through these same two connections will cause the power lock motor plunger to move in the opposite direction. The power lock motors and their hard wired circuits can be diagnosed using conventional diagnostic tools and methods.