Vision V6-201 3.3L (1993)
4. Close the driver's door. NOTE: After the doors are closed, locking the doors with RKE will also arm the system.
NOTE: If the VTSS indicator lamp flashed, the system is operational and verified. If not, there may be a problem with the system.
Arming/Disarming
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Active arming occurs when the remote keyless entry transmitter is used to lock the vehicle doors, whether the doors are open or closed. If one
or more doors are open, the arming sequence is completed only after all doors are closed.
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Passive disarming occurs upon normal vehicle entry (unlocking either front door with the key). This disarming also will halt the alarm once it
has been activated.
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Active disarming occurs when the remote keyless entry transmitter is used to unlock the vehicle doors. This disarming also will halt the alarm
once it has been activated.
System Self-Tests.
NOTE: System self-tests can be entered only with the DRB (scan tool) or MDS Machine.
Upon entering diagnostics, the headlamps and tail/park lamps will flash. In addition, the horn will sound twice. Removing the ignition key will
stop the lamps from flashing while keeping the system in diagnostics.
While in diagnostics mode, a horn pulse should occur at each of the following events, which indicates proper operation.
1. Begin with all doors closed, then open and close each door. The horn will sound when each door ajar switch closes, and then again when the
switch opens. There must be a 1-second delay between closing and opening the switch.
2. Rotate the key in each door lock cylinder to the lock and unlock positions. The horn will sound as the switch changes states. There must be a
1-second delay between changing switch states, or the horn will not sound.
3. Activate the power door lock switches to the unlock then lock positions. The horn will sound after each activation.
4. Activate the remote keyless entry in both the lock and unlock directions. The horn will sound after each activation.
5. Cycle the key to the ignition RUN position. A single horn pulse will indicate proper operation of the ignition input. This also will take the
module out of the diagnostics mode.
For any of these tests, if the switch does not remain open or closed for at least 1 second, the horn will only sound once.
The lack of a horn pulse during any operation indicates either:
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A switch failure
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The lack of that input to the module a failure internal to the module
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A faulty horn system
Check for continuity at the switch. If this is good, check for an open or shorted wire between the switch and body control module. Also, check if
the powertrain control module (PCM) has been replaced recently.
NOTE: A powertrain control module from a vehicle equipped with a vehicle theft security system cannot be used in a vehicle that is not equipped
with a vehicle theft security system.
If the VTSS indicator lamp comes on after ignition ON and stays on, the CCD bus communication with the powertrain control module possible has
been lost.
Diagnostic trouble codes - There are no diagnostic trouble codes for the vehicle theft security system, only symptoms.
Vehicle Communication
The body system consists of a combination of modules that communicate over the CCD (Chrysler Collision Detection multiplex system) bus.
Through the CCD bus, information about the operation of vehicle components and circuits is relayed to the appropriate module(s). Each module
receives the same information about a component or circuit as the other modules do. This significantly reduces the complexity of the wiring in the
vehicle and the size of the wiring harnesses.
The Chrysler Collision Detection multiplex system (CCD bus) consists of a twisted pair of wires. These wires run from one module to another.
They receive and deliver coded information between the modules. The information is coded to identify the message as well as the importance of
the message. When there are multiple messages trying to access the CCD bus at one time, the code determines the message that has higher priority,
which is then allowed to access the bus first.
The two wires (D1) and (D2) of the twisted pair that make up the CCD multiplex system are called "bus +" (bus plus) and "bus -" (bus minus)
respectively. Each wire has a measurable voltage level of roughly 2.5 volts. In order to maintain the 2.5 volts on each line and provide a means of
transportation for the coded messages, there is a "voltage divider network." This network consists of some modules with bias and some with
termination. Bias is the part of the voltage divider network that places both bus+ and bus- at 2.5 volts. Termination in the circuitry is required to
