| 1. |
Key Teaching Procedure
Key teaching must be done after replacing a
defective PCM(ECM) or when providing additional keys to the vehicle
owner.
The procedure starts with an PCM(ECM) request
for vehicle specific data (PIN code: 6digits) from the tester. The
"virgin" PCM(ECM) stores the vehicle specific data and the key
teaching can be started. The "learnt" PCM(ECM) compares the vehicle
specific data from the tester with the stored data. If the data are
correct, the teaching can proceed.
If incorrect vehicle specific data have been
sent to the PCM(ECM) three times, the PCM(ECM) will reject the
request of key teaching for one hour. This time cannot be reduced by
disconnecting the battery or any other manipulation. After
reconnecting the battery, the timer starts again for one
hour.
The key teaching is done by ignition on with
the key and additional tester commands. The PCM(ECM) stores the
relevant data in the EEPROM and in the transponder. Then the
PCM(ECM) runs the authentication required for confirmation of the
teaching process. The successful programming is then confirmed by a
message to the tester.
If the key is already known to the PCM(ECM)
from a previous teaching, the authentication will be accepted and
the EEPROM data are updated. There is no changed transponder content
(this is impossible for a learnt transponder).
The attempt to repeatedly teach a key, which
has been taught already during the same teaching cycle, is
recognized by the PCM(ECM). This rejects the key and a message is
sent to the tester.
The PCM(ECM) rejects invalid keys, which are
presented for teaching. A message is sent to the tester. The key can
be invalid due to faults in the transponder or other reasons, which
result from unsuccessful programming of data. If the PCM(ECM)
detects different authenticators of a transponder and an PCM(ECM),
the key is considered to be invalid.
The maximum number of taught keys is
4
If an error occurs during the Immobilizer
Service Menu, the PCM(ECM) status remains unchanged and a specific
fault code is stored.
If the PCM(ECM) status and the key status do
not match for teaching of keys, the tester procedure will be stopped
and a specific fault code will be stored at PCM(ECM).
| (1) |
PCM(ECM) learnt status.
|
| (2) |
PCM(ECM) virgin status.
After replacing new "PCM(ECM)" scantool
displays that PCM(ECM) is virgin status in Key Teaching
mode.
"VIRGIN" status means that PCM(ECM) has
not matched any PIN code before.
| |
| 2. |
User Password Teaching Procedure
The user password for limp home is taught at
the service station. The owner of the vehicle can select a number
with four digits.
User password teaching is only accepted by a
"learnt" PCM(ECM). Before first teaching of user password to an
PCM(ECM), the status of the password is "virgin" No limp home
function is possible.
The teaching is started by ignition on, with a
valid key and sending the user password by tester. After successful
teaching, the status of the user password changes from "virgin" to
"learnt"
The learnt user password can also be changed.
This can be done if the user password status is "learnt" and the
tester sends authorization of access, either the old user password
or the vehicle specific data. After correct authorization, the
PCM(ECM) requests the new user password. The status remains "learnt"
and the new user password will be valid for the next limp home
mode.
If incorrect user passwords or wrong vehicle
specific data have been sent to the PCM(ECM) three times, the
PCM(ECM) will reject the request to change the password for one
hour. This time cannot be reduced by disconnecting the battery or
any other actions. After reconnecting the battery, the timer starts
again for one hour.
| (1) |
User password teaching
※ In case of putting wrong password,
retry from first step after 10
seconds. |
| (2) |
User password changing
| |
| 1. |
LIMP HOME BY TESTER
If the PCM(ECM) detects the fault of the
SMARTRA or transponder, the PCM(ECM) will allow limp home function
of the immobilizer. Limp home is only possible if the user password
(4 digits) has been given to the PCM(ECM) before. This password can
be selected by the vehicle owner and is programmed at the service
station.
The user password can be sent to the PCM(ECM)
via the special tester menu.
Only if the PCM(ECM) is in status "learnt" and
the user password status is "learnt" and the user password is
correct, the PCM(ECM) will be unlocked for a period of time (30
sec.). The engine can only be started during this time. After the
time has elapsed, engine start is not possible.
If the wrong user password is sent, the
PCM(ECM) will reject the request of limp home for one hour.
Disconnecting the battery or any other action cannot reduce this
time. After connecting the battery to the PCM(ECM), the timer starts
again for one hour.
|
| 2. |
LIMP HOME BY IGNITION KEY
The limp home can be activated also by the
ignition key. The user password can be input to the PCM(ECM) by a
special sequence of ignition on/off.
Only if the PCM(ECM) is in status "learnt" and
the user password status is "learnt" and the user password is
correct, the PCM(ECM) will be unlocked for a period of time (30
sec.). The engine can be started during this time. After the time
has elapsed, engine start is not possible. After a new password has
been input, the timer (30 sec.) will start again.
After ignition off, the PCM(ECM) is locked if
the timer has elapsed 8 seconds. For the next start, the input of
the user password is requested
again. |
PROBLEMS AND REPLACEMENT
PARTS:
Problem
|
Part set
|
Scan tool
required?
|
All keys have
been lost
|
Blank key
(4)
|
YES
|
Antenna coil
unit does not work
|
Antenna coil
unit
|
NO
|
ECM does not
work
|
PCM(ECM)
|
YES
|
Ignition
switch does not work
|
Ignition
switch with Antenna coil unit
|
YES
|
Unidentified
vehicle specific data occurs
|
Key,
PCM(ECM)
|
YES
|
SMARTRA unit
does not work
|
SMARTRA
unit
|
NO
|
REPLACEMENT OF ECM AND SMARTRA
In case of a defective
ECM, the unit has to be replaced with a "virgin" or "neutral" ECM. All
keys have to be taught to the new ECM. Keys, which are not taught to the
ECM, are invalid for the new ECM (Refer to key teaching procedure). The
vehicle specific data have to be left unchanged due to the unique
programming of transponder.
In case of a defective
SMARTRA, there is no special procedure required. A new SMARTRA device
simply replaces the old one. There are no transponder-related data stored
in this device.
| 1. |
Things to remember before a replacement
(PCM(ECM))
|
| 2. |
Things to remember before a replacement (Keys
& Additional registration)
| 1. |
When there is only one key
registered and you wish to register another key, you
need to re-register the key which was already
registered. |
| 2. |
When the key #1 is registered and
master key #2 is not registered, Put the key #1 in the
IG/ON or the start position and remove it. The engine
can be started with the unregistered key
#2.
(Note that key #2 must be used
within 10 seconds of removing key
#1) |
| 3. |
When the key #1 is registered and
key #2 is not registered, put the unregistered master
key #2 in the IG/ON or the start position.
The engine cannot be started even
with the registered key
#1. |
| 4. |
When you inspect the immobilizer
system, refer to the above paragraphs 1, 2 and
3.
Always remember the 10 seconds
zone. |
| 5. |
If the pin code & password are
entered incorrectly on three consecutive inputs, the
system will be locked for one
hour. |
| 6. |
Be cautious not to overlap the
transponder areas. |
| 7. |
Problems can occur at key
registration or vehicle starting if the transponders
should
overlap. | | |
NEUTRALISING OF ECM
The PCM(ECM) can be set
to the "neutral" status by a tester.
A valid ignition key is
inserted and after ignition on is recorded, the PCM(ECM) requests the
vehicle specific data from the tester. The communication messages are
described at "Neutral Mode" After successfully receiving the data, the
PCM(ECM) is neutralized.
The ECM remains locked.
Neither the limp home mode nor the "twice ignition on" function, is
accepted by the PCM(ECM).
The teaching of keys
follows the procedure described for the virgin PCM(ECM). The vehicle
specific data have to be unchanged due to the unique programming of the
transponder. If data should be changed, new keys with a virgin transponder
are requested.
This function is for
neutralizing the PCM(ECM) and Key. Ex) when lost key, Neutralize the
PCM(ECM) then teach keys.
(Refer to the Things to
do when Key & PIN Code the PCM(ECM) can be set to the "neutral" status
by a scanner. A valid ignition key is inserted and after ignition on is
recorded, the PCM(ECM) requests the vehicle specific data from the
scanner. The communication messages are described at" Neutral Mode". After
successfully receiving the data, the PCM(ECM) is neutralized.
The PCM(ECM) remains
locked. Neither the limp home mode nor the "twice ignition on" function is
accepted by PCM(ECM).
The teaching of keys
follows the procedure described for virgin PCM(ECM). The vehicle specific
data have to be unchanged due to the unique programming of transponder. If
data should be changed, new keys with virgin transponder are
requested.
| •
|
Neutralizing setting
condition |
| -
|
In case of PCM(ECM) status
"Learnt" regardless of user password "Virgin or
Learnt" |
| -
|
Input correct PIN code by
scanner. |
| -
|
Neutralizing meaning
.
: PIN code (6) & user password
(4) deletion.
: Locking of ECM (except key
teaching
permission) | | |
