Начиная процедуру
Когда водитель поворачивает ключ зажигания в положение питания 15, ток будет поступать на координатора, который в свою очередь поставляет 12 вольт в  трансивера. Система использует 12 вольт 
Ключ стартера, координатор и блок управления EDC  впоследствии проверяется. Если все в  согласии, реле стартера и подачи топлива будет 
активирован. Предупреждение W33 лампа не покажет на, если  есть что-то не так.
Весь этот процесс больше не принимает  200-300 мс и едва заметны для водителя.

Verifying the starter key
1 After powering up, the transceiver will seek inductive contact with the starter key 
transponder.
2 After making contact, the transceiver will send confirmation to the coordinator.
3 The coordinator then sends a random number to the transponder via the transceiver unit.
4 The transponder encrypts the random number and sends back an encrypted response to the coordinator. Meanwhile, the coordinator has itself encrypted its own random number and now checks that the transponder's response is the same as its own.

Fault codes
Fault codes related to the immobiliser are stored in the coordinator. The principle tool 
used to check for any fault codes is Scania Diagnos. There are, however, other ways of reading and clearing codes using the diagnostic lamp and the diagnostic switch (S50) on the instrument panel.
The switch in question is marked "COO" (diagnostic switch panel pin 10) and is 
connected to coordinator pin 12. The switch, which has a return spring, closes and earths pin 12 when it is depressed.
The coordinator interprets this as a request to show any fault codes and will flash them out by intermittently connecting pin 12 to ground in the required pulse sequence when the switch on the panel is released.

Reading fault codes
• Switch on the power supply.
• Depress the diagnostics switch marked 
"COO" and keep it depressed for two seconds.
• The lamp will now flash if there are any fault codes present. A long flash indicates 
tens and a short flash ones. Illustrated example: Fault code 26 is indicated with 
two long flashes followed by six short ones.
• Depress the diagnostic switch once again to read the next fault code.

Erasing fault codes
Clear all fault codes as follows:
• Begin by switching off the current.
• Press the diagnostics switch and keep it depressed.
• Switch on the current again with the diagnostic switch depressed.
Limitations
Remember that reading fault codes is not always regarded as the perfect troubleshooting method. The software used is very advanced but, nonetheless, some types of faults may arise that cannot be registered with fault codes.
Likewise, situations may arise when a fault code is generated even though there is not  
fault at present. Such an example may be temporary bad contact or that a cable splice has disconnected and then connected again while the power has been on.

Fault code 26
Fault
The starter key cannot be verified.
Cause
The starter key is interpreted as being invalid. 
Either the key does not have a transponder at all or the transponder is faulty. However, it is also possible that the starter key has been programmed for another coordinator or other starter keys with transponders on the same key ring are interfering with the verification of the key.
A fault in the transceiver can also generate this 
fault code.

Remarks
The immobiliser warning lamp, W33, will flash if this fault occurs.
For more information, select "Display of status" under the "Configuration…" button in 
the system window.
Action
Make sure the correct starter key is in the starter lock. Make sure there are no more keys with transponders on the key ring. Check the transceiver and wiring.

Fault code 31

Fault

Start signal active continuously.

Cause

This fault code is generated when the coordinator receives a continuous signal that the engine has been started even though it is already running. 

The fault code is generated when the signal has been active for over 5 minutes.

Action

Check the starter lock and wiring.

Codes
Besides a plastic pouch containing the mechanical code for the starter key, a plastic 
pouch with three other codes is also delivered together with new vehicles with immobiliser. 
These are the PIN code, encryption code and bar code.
IMPORTANT!  The codes are required for programming control units and starter keys. 
Scania does not keep a register of codes and it is important that the vehicle owner keeps them safe. Lost codes will lead to extra labour and increased costs.
1. PIN Code
The PIN code can be found concealed inside the sealed plastic pouch. It always comprises 6 digits.
Principally, both the associated control units must be unlocked before any work can be done on them. The PIN code then acts as a key.

Therefore, you must specify the PIN code in 
order to carry out many of the actions in Scania 
Programmer. The PIN code is generally 
required:
• When renewing the coordinator.
• When renewing the EDC control unit.
• When removing any of the control units if they are to be used in another vehicle.
• When additional starter keys are used.
• When activating the immobiliser.
In addition, the PIN code is required if an emergency start has been necessary for some reason (see side 28).

 

2. Encryption code
The encryption code can be found concealed inside the sealed plastic pouch. It always 
comprises 12 alphanumeric characters.
You could say that the encryption code is a key that is used to verify the transponder in the starter key. For this reason, the code must be used:
• When the coordinator has been renewed and you still want to use the same starter keys as before.
• When reactivating a system that has previously been deactivated.

3. Bar code
The bar code can be found outside the plastic pouch. It is read at the factory when the control units are initially programmed.
At that moment, the control units automatically learn the PIN code and encryption code that are associated with the bar code. This means that these codes need not be revealed at this time.
The bar code, however, may also have to be specified manually in Scania Programmer. In that case, enter the 16 alphanumeric characters printed underneath the bar code lines. This will be required:
• When using new starter keys.
• When renewing the coordinator with associated new starter keys.

Timed unlocking — if the codes have been mislaid
Scania Programmer has an emergency function called timed unlocking. Performing timed unlocking enables you to unlock and program the control units even though the PIN code and encryption code have been mislaid.
Timed unlocking activates a timer in the coordinator and requires 12 hours to complete, which is why it is regarded as an emergency function.
You can disconnect Scania Programmer during this time, but the power must be turned on. 
Cutting off the power will interrupt the timed unlock.
After initiating timed unlocking, the program will display a lock code that must be given once the 12 hours are up. Entering this code manually will reset the coordinator to basic generation 3 and unlock the EDC control unit.
This means that new codes must be used for reprogramming once timed unlocking has been carried out. Starter keys (and possibly the starter lock) must be replaced with new ones. You will receive new codes with the new keys.

Coordinator serial number
The coordinator serial number must be given when initiating timed unlocking. The number is printed on a label affixed to the top of the coordinator (see illustration).

Functions in Scania Programmer

As Scania Programmer is required for most of the tasks that can be carried out on the 

immobiliser system, this section contains an overview of the options listed under the 

"Programming…" button.

An overview with brief descriptions of what each option is used for is given below. For more detailed instructions, refer to the program's help 

file.

Programming the coordinator

Choose this option to program the codes into an unprogrammed coordinator 4, for example when the coordinator has been replaced with a new one or when the old codes have been deleted from a used coordinator.

Note that all generation 4 coordinators must be programmed, even when the vehicle is not equipped with immobiliser.

You will be asked to select one of three 

programming alternatives:

• To program new starter keys, which will 

also entail new codes.

• To retain the vehicle's previous keys and 

codes.

• To program without immobiliser.

Once the codes have been programmed, the 

coordinator must be locked to the EDC control 

unit. Refer to "Locking the EDC control unit to 

the coordinator" below.

Locking the EDC control unit 

to the coordinator

Choose this option after renewing the 

coordinator or the EDC control unit. You go 

straight to this step after renewing the EDC 

control unit. Refer to "Programming the 

coordinator" above regarding the coordinator.

The program will first check the status of both 

control units. Are they locked or unlocked? 

Both units must be unlocked in order to be 

reprogrammed.

This means that the control units can be locked 

individually without being locked to any other 

control unit. If any of them are locked, you will 

be asked to unlock them using the PIN code.

What happens when the control units are 

subsequently ready for locking to each other 

naturally depends on the circumstances. Has 

the coordinator been renewed and in that case 

which options were selected under 

"Programming the coordinator"? Or has the 

EDC control unit been renewed?

The program will detect this information itself 

and display it on the screen. In principle, the 

control units will learn the same codes in order 

to communicate with each other irrespective of 

the circumstances. After learning it, they are 

said to be locked with each other.

Resetting the coordinator

Choose this option if the coordinator is to be 

removed from the vehicle and then reused in 

another vehicle. This need not be done if the 

coordinator is not programmed for an 

immobiliser.

These measures can also be employed after 

fitting a used and locked coordinator that is to 

be reprogrammed. This presumes that you also 

have access to the PIN code and encryption 

code belonging to the coordinator in question.

Resetting the coordinator will delete its code 

memory and it will retake the basic 

programming of generation 3 or 4, which is the 

equivalent of a new coordinator. Of course, 

resetting also entails that the coordinator is no 

longer locked to the EDC control unit.

If you remove the coordinator without resetting 

it and still want to use it in a new connection, 

you must make sure the PIN code and 

encryption code accompany the coordinator. 

Otherwise, it will remain locked and cannot be 

reused.

Unlocking the EDC control 

unit

The EDC control unit must be unlocked in 

order to be reprogrammed. If it is removed from 

a vehicle with immobiliser without doing this 

first, its PIN code must accompany it so that the 

control unit can be used together with another 

coordinator. Otherwise, it will remain locked 

and cannot be reused.

As soon as the EDC control unit is unlocked, it 

will no longer contain any codes.

Additional starter keys

It is possible to add to the number of keys 

available for a vehicle. The maximum number 

of starter keys that can be programmed for one 

and the same vehicle is 8.

The same encryption code programmed into the 

coordinator is also used for the transponders in 

the new keys. In this way, the original system 

codes can be retained.

Replacing starter key

For security reasons, after purchasing a used 

vehicle for instance, it may be necessary to 

replace all the starter keys with new ones.

This measure entails first resetting the 

coordinator to its basic programming (deleting 

its codes). The new codes that come with the 

new starter keys can then be programmed by 

just entering the bar code. The old system codes 

can then be discarded.

Finally, the control units must be locked to each 

other again as described in "Locking the 

coordinator to the EDC control unit" above. 

The program will take you there automatically.

Activating immobiliser

To be able to activate the immobiliser using this 

option, the vehicle must have previously had an 

activated immobiliser that has been deactivated.

This option really does not involve anything 

other than performing certain measures that 

have been described earlier. The coordinator 

must first be reset to a basic generation 4, after 

which it must be programmed with codes again 

(either with new ones or the old ones) and then 

locked together with the EDC control unit.

Deactivating immobiliser

This option also gives only directions on which 

earlier described measures are to be carried out 

to deactivate the immobiliser.

Start by resetting the coordinator to a basic 

generation 4. As all generation 4 coordinators 

must be locked to the EDC control unit, 

irrespective of whether the vehicle has an 

immobiliser or not, you should now select 

"Programming the coordinator".

You can then select "Without immobiliser" to 

make the program lock the control units 

together using the preset standard codes that 

always apply when the immobiliser has been 

deselected.

Upgrading the coordinator

If you have changed to a basic generation 3 

coordinator in a vehicle that requires 

coordinator 4, the program will be able to 

upgrade the coordinator from 3 to 4.

If this is the case, you will not be able to access 

the measures described above until the 

coordinator has been upgraded. This is the only 

selection that can be made at this stage.

Once the coordinator has been upgraded it will 

be in its basic programmed form and at the 

same initial position as described above. 

"Programming the coordinator" is the next step.

Timed unlocking

This is an emergency function used to unlock 

the control units if the codes have been mislaid. 

This is described in the section "Codes" on 

page 23.