ENGINE CONTROLS SPRING 2005

TechPro

please keep in mind that when servicing

FORD VEHICLE any power-train or body control modules, ANTI-THEFT CONTROL MODULE
COMPUTER RELEARN including re-flashing, some vehicles may (PATS) , INSTRUMENT CLUSTER
PROCEDURES lose their stored radio security code. Make (CERTAIN VEHICLES),
sure that you obtain that code from the IGNITION KEYS
customer before working on the vehicle.
Performing repairs or service on any of
Depending on the vehicle, if the Anti-theft
the following may require you to initiate a POWER-TRAIN CONTROL module, or the instrument cluster that
computer relearn procedure in order to COMPUTER REPLACEMENT contains the anti-theft module is replaced,
restore proper vehicle operation:
then an Anti-theft initialization must be
• Anti-theft control module (PATS) performed. Also, if the ignition lock
All computers supplied by us are already
• Battery replacement cylinder is replaced which uses new keys,
“flashed” or reprogrammed, which means
• Battery cables the replacement computer has the most or, additional keys are needed with the
• Crankshaft Position Sensor up-to-date information for that particular existing ignition lock cylinder,
• Flywheel vehicle, and cannot be used on another then a key relearn must be performed,
• Fuel Filter vehicle. This pertains only to OBD II otherwise the vehicle will not start with the
• Fuel Injectors computers, which are used on 1996 and new key(s). When replacing a PATS
• Fuel Pump later vehicles. There may be some module, regardless of where it is located, it
• Harmonic Balancer exceptions to that rule, but the most is always a good practice to disconnect the
• Idle Speed Controller accurate way to determine if the computer negative battery cable before
• Ignition keys can be reprogrammed is by the number of you begin.
• Ignition Lock Cylinder terminals or pins that it has. If the
• Instrument Cluster replacement computer has at least 104 pins, then it can BATTERY OR BATTERY CABLE(S)
(certain vehicles) be reprogrammed. Relearn procedures
• Powertrain Control Computer involve: Anti-theft Initialization (most Any time the battery is disconnected, the
• Powertrain Control Computer vehicles), Barometric Pressure Value Keep Alive Memory (KAM) is erased. This
reprogramming check, Crankshaft Position Sensor Profile means that any learned values that the
• Oxygen Sensor Correction, Idle Speed Control, and
• Transmission PCM has stored for adaptive systems such
Diagnostic Monitor operation. When as idle and fuel trim will have to be
Here are some helpful tips to perform a replacing a vehicle’s PCM it is always a relearned in order to achieve optimum
system relearn based upon the particular good practice to disconnect the battery’s driveability and vehicle performance. This
repair that you have performed. This negative cable before you begin. can be achieved by performing the idle
section will provide a brief summary of relearn first, and then driving the vehicle as
what steps that will need to be taken. The POWER-TRAIN CONTROL you normally would on a test drive, making
following sections will deal with the COMPUTER REPROGRAMMING sure that everything is operating properly.
specific systems (Anti-theft and Power-
train) and the procedures necessary to If diagnostics reveal that a reprogram or CRANKSHAFT, ENGINE,
restore proper vehicle operation. re-flash is necessary, relearn procedures CRANKSHAFT POSITION
involve: Anti-theft Initialization (most SENSOR, FLYWHEEL, &
REMINDER: When replacing any vehicles), Barometric Pressure Value HARMONIC BALANCER
component, make sure to disconnect the check, Crankshaft Position Sensor Profile
negative battery cable before you begin. Correction, Idle speed control, and If any of the above items are replaced, then
Also, it is just as important to make sure Diagnostic Monitor operation. Please keep a Crankshaft Profile Correction relearn is
that the ignition switch is in the “Off” in mind that when programming necessary.
position when you re-connect the battery. Powertrain &/or Body Control Modules,
Failure to do this will prevent the proper some vehicles may lose their stored
initialization from taking place and could radio code.
possibly damage the electronic
components that you are replacing. Also,

quality • technology • performance

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When you insert the key into the lock cluster or the Steering Column Ignition/
FUEL FILTER, FUEL INJECTORS, cylinder and turn the key to the run or start Lighting Module. The third type has the
FUEL PUMP, IDLE SPEED position, the PATS control module PATS module built into the PCM. The
CONTROLLER, OXYGEN “requests” the key code signal by reason Ford identifies the five different
SENSOR, & TRANSMISSION supplying power and a carrier signal to the types is due to the minimum number of
transceiver which turns the transponder keys that are required to be programmed
If any of the above items are: cleaned, inside of the ignition key on. When the key before the vehicle will start, and the
replaced, or serviced, it is necessary to is energized, it transmits its identification maximum number of keys that can be
perform an Adaptive Memory relearn. If code to the transceiver which then sends programmed into a particular system.
the Idle Speed Controller is serviced, then the coded key signal to the PATS control Keep in mind that if the maximum number
an Idle relearn is necessary. module. If the PATS module recognizes of keys for a particular system has been
the key code, it then transmits a signal to programmed into the PATS memory, no
FORD ANTI-THEFT RELEARN the Power-train computer (PCM) to enable additional keys can be programmed into
PROCEDURES fuel pump and fuel injector operation. that system unless you erase all previous
Some systems also use a separate keys programmed into the system’s
starter relay in order to prevent engine memory. Depending upon the system,
The Ford Passive Anti-theft System (which
cranking unless a correct key code signal a scan tool may be necessary to
we will refer to as: PATS) uses a special
is received. accomplish this. Also, depending on
programmable key which has a
what component of the system is replaced,
transponder embedded in its head. The
Ford uses five variations of PATS systems. a different relearn or initialization process
transponder contains radio frequency
To simplify matters, there are really only is necessary.
generating electronics which signal must
three different types of systems due to
be identified by the PATS module in order
the hardware that’s actually used on In order to properly identify the system
for the vehicle to start. This signal is
the vehicle. that a vehicle uses, please refer to the
transmitted to the PATS module via the
All of the systems use: a transponder key, PATS System Identification chart.*
transceiver which is a device mounted in
a transceiver which is mounted in the
the steering column around the ignition
steering column at the ignition lock, and a REMEMBER- These procedures are for
lock assembly. The PATS module stores
PCM. The difference between the systems ANTI-THEFT relearn or initialization
the identifiable ignition key codes that are
is where the PATS module is located. The ONLY. The PCM relearn procedures will
programmed into a non-volatile memory.
first system uses a separate PATS module be covered later in this tech tip.
This means that the codes cannot be
with a PCM. The second type has the PATS
erased unless certain procedures
module located inside of the instrument
are followed.

Barometric Pressure Reference Table

Barometric Pressure [in Hg] Barometric Pressure [kPa] BARO/MAP PID [Hz] Altitude above sea level [ft]

3.5 11.8 89.3

5 16.9 92.8
10 33.8 104.6
15 50.7 117.0 14,000
20 67.5 129.6 10,000
21 70.9 132.5 9,000
22 74.3 135.4 8,000
23 77.7 138.3 7,000
24 81.1 141.1 6,000
25 84.4 144.0 5,000
26 87.8 146.9 4,000
27 91.2 149.8 3,000
28 94.6 152.8 2,000
29 97.9 155.8 1,000
30 101.3 158.9 0 (sea level)
31 104.7 162.0
31.875 107.7 164.7
 3
PATS System Identification Chart
Make Vehicle Model Year PATS Max Minimum Starter Requires Theft
Type Keys Keys Interrupt Parameter Indicator
System Required Present Reset Flashes at
Ignition OFF
Contour (V6 Only) 98 A 16 1 Y N Y
98 (2/2/98 Build or Later) - 00 E 8 2 Y N Y
Crown Victoria 98-02 B 8 2 N Y Y
03-04 E 8 2 or 3 Y N Y
Escape 01-04 E 8 2 Y N Y
Excursion 00-04 B 8 2 N Y Y
Expedition 97-98 A 16 1 N N N
99-02 C 8 2 N Y Y
03-04 E 8 2 Y N Y
Explorer (4dr) 98-01 B 8 2 N Y Y
02-04 E 8 2 Y N Y
Explorer (2dr/sport) 98-01(Before 7/24/00) B 8 2 N Y Y
01(7/24/00 Build or Later) - 03 E 8 2 Y N Y
Explorer Sport Trac 01(Before 7/24/00) B 8 2 N Y Y
01(7/24/00 Build or Later) - 04 E 8 2 Y N Y
FORD

F-150 Classic 99-04 C 8 2 N Y Y

F-150 Harley Davidson 01-03 C 8 2 N Y Y
F-150 04 E 8 2 Y N Y
F-250 (Under 8500 #GVW) 99-00 C 8 2 N Y Y
Focus 00-04 E 8 2 Y N Y
Freestar 04 E 8 2 Y N Y
Mustang 96-97 A 16 1 N N N
98 B 8 2 N Y Y
99-04 C 8 2 N Y Y
Ranger (3.0L & 4.0L Only) 99-00 B 8 2 Y Y Y
Ranger (2.3L, 3.0L & 4.0L) 01-04 E 8 2 Y N Y
Taurus 96-97 A 16 1 N N N
(Duratec Only, 3.0L DOHC)
Taurus (All Engines) 98-99 B 8 2 Y Y Y
00-04 E 8 2 Y N Y
Thunderbird 02-04 C 8 2 Y Y N
Windstar 99-00 C 8 2 Y Y Y
01-03 E 8 2 Y N Y
Aviator 03-04 E 8 2 Y N Y
Blackwood 02-03 C 8 2 N Y Y
LINCOLN

Continental 98-02 C 8 2 N Y Y
LS 00-04 C 8 2 Y Y N
Mark VIII 97-98 D 16 2 Y N N
Navigator 98 A 16 1 N N N
99-02 C 8 2 N Y Y
03-04 E 8 2 Y N Y
Cougar 99-02 E 8 2 Y N Y
Grand Marquis 98-02 B 8 2 N Y Y
03-04 E 8 2 or 3 Y N Y
Marauder 03 E 8 2 or 3 Y N Y
MERCURY

Monterey 04 E 8 2 Y N Y
Mountaineer (4 dr) 98-01 B 8 2 N Y Y
E 8 2 Y N Y
Mystique (V6 Only) 98 A 16 1 Y N Y
98 (2/2/98 Build or Later)-00 E 8 2 Y N Y
Sable 96-97 A 16 1 N N N
(Duratec Only, 3.0L DOHC) 98-99 B 8 2 Y Y Y
Sable (All Engines) 00-04 E 8 2 Y N Y
 4

IGNITION LOCK CYLINDER PROCEDURE WITHOUT A SCAN TOOL

SYSTEM “A” REPLACEMENT If you do not have a scan tool with PATS
Replacement of the ignition lock cylinder programming capability, then you can use
This system has a maximum program will require you to make one of two the following procedure. Just insert the
capacity of 16 keys. choices. If you have the new cylinder new key into the lock cylinder and turn the
coded to the cut of the old key, then no key cylinder to the “Run” position. After you
PCM REPLACEMENT OR programming is necessary because the do this, the “Theft” indicator light will
REPROGRAMMING PATS module will recognize the existing begin to flash. It will take approximately 15
No special procedures are required. key chip. If you replace the ignition minutes for the light to stop flashing.
cylinder with one that uses new keys, then Within 5 minutes after the light has
PATS CONTROL MODULE a new key relearn is necessary. stopped flashing, Turn the ignition switch
REPLACEMENT to the “Off” position for one second, and
After installing the new module, cycle the NEW IGNITION KEY PROGRAMMING then back to the “Run” position. After
ignition key to the “On” position. After the You can use this procedure for one of two doing this, the “Theft” indicator light will
security light turns off, the key is situations. First, if you have replaced the begin flashing again for another 15
programmed. To program additional keys: ignition lock cylinder that uses new keys minutes. When the light stops flashing for
see Spare Key Programming. and the original keys will not work with the the second time, turn the key to the “Off’
new cylinder. Or, all of the existing keys position for one second, and then back to
SPARE KEY PROGRAMMING have been lost and you need to program a the “On” position for the third and final
A scan tool is not needed to program replacement key to start the car. time. The “Theft” light will flash for
additional keys, however, it can be used to In either situation, once you perform either another 15 minutes. After the third time,
erase previously programmed keys. of the next two procedures, all of the keys which will be approximately 45 minutes
This system requires at least one that were currently stored in the PATS from the start of the process, the PATS
previously programmed key in order to module’s memory will be erased. This control module will have erased any of the
program any additional keys. Just place means that if you want to use them again, keys that were programmed into its
any previously programmed key into the a Spare Key Relearn must be performed memory, while programming the new key
ignition cylinder and turn the cylinder to after the new keys have been programmed. that you have just used into its memory.
the “Run” position. Return the key to the This key will now start the car. Any
off position. Within 15 seconds of doing PROCEDURE WITH A SCAN TOOL additional keys can now be programmed
this, remove the key, place an If you have a scan tool that has PATS using the Spare Key Programming
un-programmed key into the cylinder, programming capability, then insert the procedure.
turning the cylinder to the “Run” position. new key into the ignition lock cylinder and
At this point the security light on the dash rotate the key to the “On” position.
should turn off in approximately 2 Following the scan tool’s instructions,
seconds. After the light turns off, the new enter into the “ERASE ON” function. This
key is programmed into memory and will process will take a minimum of 8 minutes
start the car. Repeat this process for any to complete. When the process is
additional keys. This system has a capacity completed, turn the ignition switch to the
for 16 keys to be programmed into the “Off” position and then back to the “On”
PATS module. position in order to program the new key
into the PATS memory. If you have to
program any additional keys, just use the
Spare Key Programming procedure.
 5
vehicle before returning it to the customer, the system in your possession before
SYSTEM “B” so that all of the other adaptive parameters you begin.
in the PCM’s memory can be relearned. First, insert the first programmed key into the
This system has a maximum program You can access this function by entering into ignition cylinder and rotate the ignition switch
capacity of 8 keys. the PCM functions from the scan tool menu. to the “Run” position for 3 seconds. Turn the
Next select the ACTIVE COMMANDS function. ignition switch to the “Off” position and
PCM REPLACEMENT (scan tool required) After performing the reset, exit this function remove the first key. Within 5 seconds of
After installing the replacement PCM, an Anti- and disconnect the scan tool. After waiting 10 turning the ignition switch off, insert the
theft initialization must be performed using a seconds, cycle the ignition switch from “Off” second programmed key into the cylinder,
scan tool with PATS capability. Follow the to the “Run” position 3 times, each time and turn the ignition switch to the “Run”
scan tool manufacturer’s instructions to enter leaving the switch in the “Run” position for at position for 3 seconds. Next, turn the ignition
the PATS functions. Usually there’s a 10 least three seconds before returning to the switch to the “Off” position and remove the
minute delay when accessing the SECURITY “Off” position. second key. Within 10 seconds of turning the
function. Select the PARAMETER RESET ignition switch off, insert an un-programmed
function. After you have made the selection, These steps will initialize the PATS module key into the cylinder and turn the ignition
return to the main menu, then turn the and the PCM. The next time that you rotate switch to the “Run” position for 1 second.
ignition key to the “Off” position. Next, the ignition switch to the “On” position, the The new key is now programmed and should
disconnect the scan tool from the diagnostic “Theft” indicator (If the vehicle has one) start the vehicle. If you need to program any
connector. Cycle the ignition key from the should turn off after three seconds and the additional keys, then you must repeat this
“Off” position to the “Run” position for a total vehicle should start. entire procedure for each un-programmed
of 5 times, making sure that each time that key.
you cycle the key that it stays in the “Run” SPARE KEY PROGRAMMING
position for at least 3 seconds, and in the off The spare key programming function on this IGNITION LOCK CYLINDER REPLACEMENT
position for at least 2 seconds. This process system requires that there must be at least 2 Replacement of the ignition lock cylinder will
will initialize the PCM/PATS module keys already programmed into the system. If require you to make one of two choices. If
communication. When this process is 2 programmed keys are not available, or are you have the new cylinder coded to the cut of
completed, the next time that you turn the key lost, then you must use a scan tool to the old key, then no key programming is
to the “On” position, the “Theft” light (If the program any additional keys. If keys are lost, necessary because the PATS module will
vehicle has one) will turn off after 3 seconds, or not in the owner’s possession, then you recognize the existing key chip. If you replace
and the vehicle can now be started. can erase all of the programmed key codes the ignition cylinder with one that uses new
with a scan tool that has PATS capability. keys, then a new key relearn is necessary.
PCM REPROGRAMMING
No special procedures are required. PROCEDURE WITH A SCAN TOOL NEW IGNITION KEY PROGRAMMING (scan
If you do not have 2 keys that have been tool required)
PATS CONTROL MODULE REPLACEMENT previously programmed into the PATS This procedure requires the use of a scan tool
(scan tool required) memory in your possession, then a scan tool with PATS capability.
Replacement of the PATS control module must be used in order to program any You must use the erase function if you are
requires an Anti-theft initialization using a additional keys. replacing the ignition lock cylinder that uses
scan tool with PATS capability. The steps are different cut keys. Keep in mind that the
exactly the same as the PCM replacement If you have a scan tool with PATS vehicle will not start until at least 2 keys have
except that after you disconnect the scan tool, programming capability, insert an un- been programmed into the system once the
you must then wait 10 seconds. After waiting, programmed key into the ignition lock and key codes have been erased. This also means
you must cycle 2 keys in the ignition cylinder turn the ignition switch to the “On” position. that any previously programmed keys that did
from the “Off” position to the “Run” position, Follow the Scan tool’s instructions to enter start the car will no longer have that ability
holding each key in the “Run” position for at the KEY CODE PROGRAM function in the once the IGNITION KEY CODE ERASE
least 3 seconds before returning to the “Off” SECURITY menu. Remember, there is a 10 function has been completed. In order to do
position. minute delay when accessing the SECURITY this, you must access the SECURITY function
Two keys must be programmed, otherwise, menu. Next, return to the main menu. If you of your scan tool. Remember, there usually is
the vehicle will not start, and you will not be would like to program any additional keys (up a 10 minute wait in order to enter this
able to perform any of the Spare Key to a maximum of 8 keys), then repeat this function. Select the IGNITION KEY CODE
programming procedures described below. process with the next un-programmed key. If ERASE function. Turn the ignition switch to
After the second key has been cycled, the you are finished programming keys, then the “Off” position and then disconnect the
vehicle should start. If the vehicle does not disconnect the scan tool and wait for 10 scan tool. Next, insert the first key to be
start, repeat the key cycling process again. If seconds. The key is now programmed. Turn programmed into the lock cylinder and turn
after repeating this process the vehicle still the key to the “Off” position. Next, verify that the ignition switch to the “Run” position for 3
does not start, you must perform a KEEP the vehicle starts with the new key(s). seconds. Turn the switch to the “Off”
ALIVE MEMORY RESET with your scan tool. position. Repeat this procedure for the
Keep in mind that if you do reset the Keep PROCEDURE WITHOUT A SCAN TOOL second key. Once the second key is
Alive Memory, you must perform an idle In order to program any additional keys into programmed, the vehicle should start and you
control relearn before driving the vehicle. It this PATS system, you must have 2 of the should be able to program any spare keys
is also advisable that you test drive the keys that have already been programmed into into the system.
 6
STEERING COLUMN LOCK ACTUATOR and turn the ignition key to the “Off”
SYSTEM “C” REPLACEMENT (scan tool required) position. The steps are exactly the same as
When replacing the steering lock actuator the PCM replacement, except that after you
This system has a maximum program on any vehicle, or the PCM on 2000-2001 disconnect the scan tool, you must then
capacity of 8 keys. Lincoln LS with a V6 and manual wait 10 seconds. After waiting, you must
transmission, you must perform a cycle 2 keys in the ignition cylinder from
In this system, the PATS module is built PARAMETER RESET to the steering the “Off” position to the “Run” position,
into the instrument cluster. It functions in column lock module. This requires a scan holding each key in the “Run” position for
the exact manner as the systems using a tool with PATS capability. The steering at least 3 seconds before returning to the
separate PATS module. column lock actuator will only allow “Off” position. Two keys must be
communication with a scan tool after the programmed, otherwise, the vehicle will
PCM REPLACEMENT (scan tool required) module has been activated. not start, and you will not be able to
After installing the replacement PCM, an To activate the module, make sure that the perform any of the Spare Key
Anti-theft initialization must be performed ignition key is not in the ignition cylinder. programming procedures described
using a scan tool with PATS capability. Open the driver’s door. By opening the below. After the second key has been
Follow the scan tool manufacturer’s driver’s door, the module will stay cycled, the vehicle should start. If the
instructions to enter the PATS functions, activated for 30 minutes. The following vehicle does not start, repeat the key
except with this system, depending on must be completed within that 30 minutes. cycling process again. If after repeating
what vehicle it is, you may not see PATS. Connect the scan tool. Select SCLM this process the vehicle still does not start,
You will probably see VIC (Virtual Image (Steering Column Lock Module). Next, you must perform a KEEP ALIVE MEMORY
Cluster Module), HEC (Hybrid Electronic select ENTER SECURITY. There is usually RESET with your scan tool. Keep in mind
Cluster), or ICM (Instrument Cluster a 10 minute wait before the next menu that if you do reset the Keep Alive
Module). That’s because the PATS module appears. Select PARAMETER RESET. Memory, you must perform an idle
is located in the instrument cluster, and, Insert the ignition key and turn the switch control relearn before driving the
depending on the vehicle, Ford has a to the “Run” position. Next, select ICM vehicle. It is also advisable that you test
different name for the instrument cluster. (Instrument Column Module). Select drive the vehicle before returning it to the
Entering into the SECURITY function, there ENTER SECURITY ACCESS from the customer, so that all of the other
is usually a 10 minute delay for security menu, and wait 10 minutes for access. adaptive parameters in the PCM’s
reasons. When the menu appears, select RESET memory can be relearned.
Next select the PARAMETER RESET SCLM PARAMETER. Disconnect the scan You can access this function by entering
function. After you have made the tool and turn the ignition key to the “Off” into the PCM functions from the scan tool
selection, return to the main menu and position. Now remove the key, and place it menu. Next select the ACTIVE
turn the ignition key to the “Off” position. back into the ignition switch and return the COMMANDS menu. After performing the
Next, disconnect the scan tool. Now cycle switch to the “Run” position. Finally, turn reset, exit this function and disconnect the
the ignition key from the “Off” position to the ignition switch to the “Off” position scan tool. After waiting 10 seconds, cycle
the “Run” position for a total of 5 times, and remove the key. The reset procedure the ignition switch from “Off” to the “Run”
making sure that each time that you cycle is complete. position 3 times, each time leaving the
the key that it stays in the “Run” position switch in the “Run” position for at least
for at least 3 seconds, and in the “Off” PCM REPROGRAMMING three seconds before returning to the “Off”
position for at least 2 seconds. This will No special procedures are required. position.
initialize the PCM/PATS module These steps will initialize the PATS module
communication. When this process is INSTRUMENT CLUSTER REPLACEMENT - and the PCM. The next time that you rotate
completed, the next time you turn the key PATS MODULE (scan tool required) the ignition switch to the “On” position,
to the “On” position, the “Theft” light will The PATS module is also located inside of the “Theft” indicator should turn off after
turn off after 3 seconds and the vehicle the instrument cluster. So, whatever the three seconds and the vehicle should start.
can now be started. reason for replacement, the following
NOTE: When replacing the PCM on a procedure must be performed. SPARE KEY PROGRAMMING
2000-2001 Lincoln LS with a V6 and Replacement of the PATS control module Refer to System “B”. Keep in mind that
manual transmission, you must also requires an Anti-theft initialization using a when using a scan tool for any key
perform a PARAMETER RESET to the scan tool with PATS capability. Remember, programming functions, depending on the
steering column lock module. Follow depending on what the vehicle is, you may vehicle, PATS may be referred to as : HEC,
your scan tool manufacturer’s not see the PATS function. You may see: ICM, or VIC.
instructions for this procedure. VIC, HEC, or ICM. Enter into the
SECURITY function. There will be the usual IGNITION LOCK CYLINDER
10 minute delay. Select the PARAMETER REPLACEMENT- see “New Ignition Key
RESET function. Return to the main menu Programming System B”.
 7
IGNITION LOCK CYLINDER “Off” position. Remove that key and within
SYSTEM “D” REPLACEMENT 15 seconds of removing that key, insert
Replacement of the ignition lock cylinder the second key to be programmed and
This system has a maximum program will require you to make one of two turn the ignition switch to the “On”
capacity of 16 keys. choices. If you have the new cylinder position. The second key is now
coded to the cut of the old key, then no key programmed, and either key should start
This system is a very unique system in programming is necessary because the the vehicle. If you have to program any
that the PATS module is actually contained PATS/SCIL module will recognize the additional keys, refer to the Spare Key
inside of the Steering Column existing key chip. If you replace the programming procedure.
Ignition/Lighting Module (SCIL). It is also ignition cylinder with one that uses new
limited to the 1997-1998 Lincoln Mark keys, then a new key relearn is necessary. PROCEDURE WITHOUT A SCAN TOOL
VIII. If you do not have a scan tool with
NEW IGNITION KEY PROGRAMMING PATS/SCIL programming capability, then
PCM REPLACEMENT OR You can use this procedure for one of two you can use the following procedure. Just
REPROGRAMMING situations. First, if you have replaced the insert the new key into the lock cylinder
No special procedures are required. ignition lock cylinder that uses new keys and turn the cylinder to the “Run” position.
and the original keys will not work with the After you do this, the “Theft” indicator light
PATS CONTROL MODULE/ STEERING new cylinder. Or, all or most of the existing will begin to flash. It will take
COLUMN IGNITION/LIGHTING MODULE keys have been lost and you need to approximately 15 minutes for the light to
PCM/PATS program a replacement key to start stop flashing. Within 5 minutes after the
Module initialization is a very simple the car. light has stopped flashing, Turn the
procedure where a scan tool is not needed. In either situation, once you perform either ignition switch to the “Off” position for one
The only requirement is that 2 keys must of the next two procedures, all of the keys second, and then back to the “Run”
be programmed into the PATS memory in that were currently stored in the PATS position. After doing this, the “Theft”
order for the vehicle to start. After module’s memory will be erased. This indicator light will begin flashing again for
installing the new module, cycle the first means that if you want to use them again, another 15 minutes. When the light stops
key in the ignition switch to the “Run” a Spare Key Relearn must be performed flashing for the second time, turn the key
position for 1 second. Turn the switch to after the new keys have been programmed. to the “Off’ position for one second, and
the “Off” position. Remove the first key, Remember, this system must have two then back to the “On” position for the third
and insert a second key into the ignition keys programmed into the PATS/SCIL and final time. The “Theft” light will flash
cylinder. As with the first key, turn the module in order for the vehicle to start. for another 15 minutes. After the third
switch to the “Run” position for 1 second. time, which will be approximately 45
Turn the switch to the “off” position. The PROCEDURE WITH A SCAN TOOL minutes from the start of the process, the
module is now initialized and both keys are If you have a scan tool that has PATS/SCIL PATS control module will have erased any
now programmed into the PATS memory. programming capability, then insert a key of the keys that were programmed into its
The vehicle should start with either key. into the ignition lock cylinder and rotate memory, while programming the new key
the ignition switch to the “On” position. that you have just used into its memory. In
SPARE KEY PROGRAMMING Following the scan tool’s instructions, order for the vehicle to be started, you
See Spare Key Programming enter into the “ERASE ON” function. If the must program a second key. Any
System “A”. key that you are using is a programmed additional keys can now be programmed
A scan tool cannot be used to program key, then the erase process will take using the Spare Key Programming
additional keys. However, it can be used to approximately 3 seconds. If you are using procedure. You cannot use a scan tool to
erase keys that have been programmed a new un-programmed key, then this program additional keys with this system.
into the PATS/SCIL memory. This system process will take a minimum of 8 minutes
has a capacity for 8 keys to be to complete. When the process is
programmed into the PATS module. completed, turn the ignition switch to the
“Off” position. Disconnect the scan tool.
Now turn the ignition switch to the “Run”
position to program the first key into the
PATS/SCIL memory. Turn the switch to the
 8
ignition switch in the “On” position, access PATS CONTROL MODULE REPLACEMENT
SYSTEM “E” the SECURITY function. After the 10 The PATS module is contained in the PCM
minute wait, select the KEY CODE ERASE on this system. See PCM replacement.
This system has a maximum program function. Do not perform any other
capacity of 8 keys. functions at this time. Next, turn the SPARE KEY PROGRAMMING
ignition switch off and disconnect the scan see Spare Key Programming system “B”
In this system, the PATS feature is tool. Now, turn the ignition switch back to
incorporated into the PCM. It functions the “On” position for at least 2 seconds. IGNITION LOCK CYLINDER
exactly as the other systems that use a Remove that key and insert a second key REPLACEMENT
separate PATS module. into the ignition lock and cycle that key for see system “B”
a minimum of 2 seconds. After the second
PCM REPLACEMENT (scan tool required) key has been cycled, either key will start NEW IGNITION KEY PROGRAMMING
After installing the replacement PCM, a the vehicle. If there are any other keys to see system “B”
scan tool with PATS capability is required be programmed, see the Spare Key
to erase all of the keys that were Programming procedure.
previously programmed into the PATS PCM REPROGRAMMING
memory, and to begin programming of the No special procedures are required.
existing keys for the vehicle. THIS ENDS THE FORD ANTI-THEFT
As with the other systems, with the SYSTEM RELEARN PROCEDURES

IDLE SPEED CONTROL RELEARN RESETTING KEEP ALIVE MEMORY (KAM)

FORD POWERTRAIN RELEARN Ideally, the idle speed control relearn You can reset the Keep Alive memory by
PROCEDURES should be the first step performed before disconnecting the battery’s negative cable
the vehicle is driven. In order to perform for a minimum of 5 minutes. Resetting the
As we stated at the beginning of this the idle control relearn, complete the memory will clear any learned values that
article, replacement or servicing of some following: the PCM has stored for adaptive strategy
components required a system relearn. such as fuel trim, idle adjustments, and
Here is an explanation of those relearn 1. Safely block the drive wheels and let transmission operation. This will require
procedures. the engine idle for 15 minutes. that you road test the vehicle after
2. Idle the vehicle in Neutral with the performing an idle relearn, so that the
BAROMETRIC PRESSURE VALUE CHECK air conditioning/defroster OFF for PCM can implement its adaptive strategy
Barometric pressure has a dramatic effect 2 minutes. and operate normally when you return the
on the PCM’s calibration for fuel delivery 3. Idle the vehicle in Neutral with the vehicle to the customer. The PCM has the
and ignition timing. Since the PCM uses air conditioning/defroster ON for ability to adapt closed-loop control to
this value as a starting point, it’s a good 2 minutes. changing operating conditions such as:
practice to check this value with your scan 4. Idle the vehicle in Drive with the altitude, engine wear, and fuel quality in
tool just to make sure that the PCM is air conditioning/defroster OFF for order to improve control of the air-fuel
interpreting this information properly. 2 minutes. ratio, ignition timing, idle RPM, and
Refer to the Barometric Pressure 5. Idle the vehicle in Neutral with the transmission shift control. If you do not
Reference table on page 2. air conditioning/defroster ON for drive the vehicle, initially, it may operate
Based on your particular altitude, you 2 minutes. differently until it adapts to the specific
should see the appropriate value on the conditions and driving habits of the driver.
chart. If you do not, then you must The idle relearn is complete. Keep in mind that resetting the memory
determine what the problem may be before will also clear the Crankshaft Profile
you proceed any further. Refer to the DIAGNOSTIC MONITOR OPERATION Correction. It’s a good idea to reset the
Barometric Pressure Reference Table. VERIFICATION Keep Alive Memory whenever you replace
If you had to replace or re-program a PCM, or service: fuel filter, fuel pump, fuel
CRANKSHAFT POSITION SENSOR as well as replace any part for a problem injectors, harmonic balancer, idle speed
PROFILE CORRECTION or fault code, it is a good idea to make controller, oxygen sensor, and
In order to relearn this profile correction sure that the diagnostic monitor for that transmission.
factor, the vehicle must be driven through particular system has completed its test by
3 deceleration periods from 60 to 40 MPH road testing the vehicle in such a manner John Rogers- Technician
with no braking. This must be completed that will satisfy the diagnostic monitor’s Jose Jance- Technician
before the misfire monitor will be fully condition for testing that system and not Nick Rinaldi- Tech Line Manager
operational. setting another fault code, before you
return the vehicle to the customer.

CQ9662_04-05