Not sure "resetting" is your issue here.
It would be great if you could get ahold of an owner's manual on eBay.
Here's an overview at least of your PATS system, which I hope will give you a clearer idea of what to ask and where to look:
The Passive Anti-Theft System (PATS) also contains the following components:
- Theft indicator.
- Encoded ignition key.
- Passive anti-theft transceiver module.
- Hybrid Electronic Cluster (HEC) .
- Powertrain control module.
- J1850 communication network.
- Lighting Control Module (LCM) .
passive anti-theft system (PATS) uses radio frequency identification
technology to deter a driveaway theft. Passive means that it does not
require any activity from the user. This system is known as
SecuriLock(R) in North America, Safeguard(R) in the U.K., and PATS in
Continental Europe. This information can be found in customer
literature such as the Owner's Manual.
PATS uses a specially encoded ignition key. Each encoded ignition key
contains a permanently installed electronic device called a
transponder. Each transponder contains a unique electronic
identification code out of over 72 million billion combinations.
Each encoded ignition key must be programmed into a vehicle's hybrid
electronic cluster (HEC) before it can be used to start the engine.
There are special diagnostic service procedures outlined in the
workshop manual that must be performed if the encoded ignition keys
need to be replaced.
The encoded key is larger than a traditional ignition key. The key does
not require batteries and should last the life of the vehicle.
The transceiver module communicates with the encoded ignition key. This
module is located behind the steering column shroud, and contains an antenna
connected to a small electronic module. During each vehicle start
sequence, the transceiver module reads the encoded ignition key
identification code and sends the data to the HEC.
The control functions are contained in the HEC. This module performs
all of the PATS functions, such as receiving the identification code
from the encoded ignition key and controlling engine enable. The HEC
initiates the key interrogation sequence when the vehicle ignition
switch is turned to RUN or START.
PATS uses the Powertrain Control Module (PCM) to enable or
disable the engine. The HEC communicates with PCM over the J1850
network in order to enable engine operation. The HEC and the PCM use
sophisticated messages in order to prevent a theft. The HEC
communicates with the lighting control module (LCM), which controls the
theft indicator.The HEC and the PCM share security data when first
installed together that makes them a matched pair. After this security
data sharing, these modules will not function in other vehicles. The
shared PCM ID is remembered even if the battery is disconnected. The
HEC also stores the vehicle's key identification code even if the
battery is disconnected. There are special diagnostic workshop
procedures outlined in this service manual that may be performed if
either the HEC or the PCM needs replacement.
All elements of PATS must be functional before the engine is allowed to
start. If any of the components are not working properly, the vehicle
will not start.
PATS uses a visual theft indicator. This indicator will prove out for three seconds
when the ignition switch is turned to RUN or START under normal
operation. If there is a PATS problem, this indictor will either flash
rapidly or glow steadily (more than three seconds ) when the ignition switch is turned to RUN or START. PATS also "blips" the theft indicator every two seconds at ignition OFF to act as a visual theft deterrent.
PATS differs from the perimeter anti-theft system in that PATS enables
and disables the engine from starting. If equipped, the perimeter
anti-theft system protects the perimeter of the vehicle (doors, hood,
and trunk) and sounds an alarm.
The PATS is not compatible with aftermarket remote start systems, which
allow the vehicle to be started from outside the vehicle. These systems
may reduce the vehicle security level, and also may cause no-start
issues. Remote Start systems must be removed before investigation of
PATS-related No Start issues.